Commit | Line | Data |
---|---|---|
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; | |
1da177e4 LT |
300 | u8 retval; |
301 | ||
3bf2d28a VF |
302 | /* handling a special case: when the configuration starts with |
303 | * link down, it sets the duplex to 0. | |
304 | */ | |
547942ca | 305 | if (slave->link != BOND_LINK_UP) { |
128ea6c3 | 306 | retval = 0x0; |
547942ca | 307 | } else { |
1da177e4 LT |
308 | switch (slave->duplex) { |
309 | case DUPLEX_FULL: | |
128ea6c3 | 310 | retval = 0x1; |
d4471f5e VF |
311 | netdev_dbg(slave->bond->dev, "Port %d Received status full duplex update from adapter\n", |
312 | port->actor_port_number); | |
1da177e4 LT |
313 | break; |
314 | case DUPLEX_HALF: | |
315 | default: | |
128ea6c3 | 316 | retval = 0x0; |
d4471f5e VF |
317 | netdev_dbg(slave->bond->dev, "Port %d Received status NOT full duplex update from adapter\n", |
318 | port->actor_port_number); | |
1da177e4 LT |
319 | break; |
320 | } | |
321 | } | |
322 | return retval; | |
323 | } | |
324 | ||
3bf2d28a | 325 | /* Conversions */ |
1da177e4 LT |
326 | |
327 | /** | |
328 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
329 | * @timer_type: which timer to operate | |
330 | * @par: timer parameter. see below | |
331 | * | |
332 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
333 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
3bf2d28a | 334 | * %SLOW_PERIODIC_TIME. |
1da177e4 LT |
335 | */ |
336 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
337 | { | |
128ea6c3 | 338 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
339 | |
340 | switch (timer_type) { | |
3bf2d28a | 341 | case AD_CURRENT_WHILE_TIMER: /* for rx machine usage */ |
7bfc4753 | 342 | if (par) |
3bf2d28a | 343 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); |
7bfc4753 | 344 | else |
3bf2d28a | 345 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); |
1da177e4 | 346 | break; |
3bf2d28a | 347 | case AD_ACTOR_CHURN_TIMER: /* for local churn machine */ |
1da177e4 LT |
348 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
349 | break; | |
3bf2d28a VF |
350 | case AD_PERIODIC_TIMER: /* for periodic machine */ |
351 | retval = (par*ad_ticks_per_sec); /* long timeout */ | |
1da177e4 | 352 | break; |
3bf2d28a | 353 | case AD_PARTNER_CHURN_TIMER: /* for remote churn machine */ |
1da177e4 LT |
354 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); |
355 | break; | |
3bf2d28a | 356 | case AD_WAIT_WHILE_TIMER: /* for selection machine */ |
1da177e4 LT |
357 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); |
358 | break; | |
359 | } | |
3bf2d28a | 360 | |
1da177e4 LT |
361 | return retval; |
362 | } | |
363 | ||
364 | ||
3bf2d28a | 365 | /* ================= ad_rx_machine helper functions ================== */ |
1da177e4 | 366 | |
2d6682db JV |
367 | /** |
368 | * __choose_matched - update a port's matched variable from a received lacpdu | |
369 | * @lacpdu: the lacpdu we've received | |
370 | * @port: the port we're looking at | |
371 | * | |
372 | * Update the value of the matched variable, using parameter values from a | |
373 | * newly received lacpdu. Parameter values for the partner carried in the | |
374 | * received PDU are compared with the corresponding operational parameter | |
375 | * values for the actor. Matched is set to TRUE if all of these parameters | |
376 | * match and the PDU parameter partner_state.aggregation has the same value as | |
377 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
378 | * in the aggregation. Matched is also set to TRUE if the value of | |
379 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
380 | * an individual link and lacp will actively maintain the link. Otherwise, | |
381 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
382 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
383 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
384 | * partner_state.lacp_activity variables are TRUE. | |
385 | * | |
386 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
387 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
388 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
389 | */ | |
390 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
391 | { | |
815117ad | 392 | /* check if all parameters are alike |
393 | * or this is individual link(aggregation == FALSE) | |
394 | * then update the state machine Matched variable. | |
395 | */ | |
2d6682db JV |
396 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && |
397 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
815117ad | 398 | MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) && |
2d6682db JV |
399 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && |
400 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
401 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
2d6682db JV |
402 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) |
403 | ) { | |
2d6682db JV |
404 | port->sm_vars |= AD_PORT_MATCHED; |
405 | } else { | |
406 | port->sm_vars &= ~AD_PORT_MATCHED; | |
407 | } | |
408 | } | |
409 | ||
1da177e4 LT |
410 | /** |
411 | * __record_pdu - record parameters from a received lacpdu | |
412 | * @lacpdu: the lacpdu we've received | |
413 | * @port: the port we're looking at | |
414 | * | |
415 | * Record the parameter values for the Actor carried in a received lacpdu as | |
416 | * the current partner operational parameter values and sets | |
417 | * actor_oper_port_state.defaulted to FALSE. | |
418 | */ | |
419 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
420 | { | |
1da177e4 | 421 | if (lacpdu && port) { |
b99d6ba9 HE |
422 | struct port_params *partner = &port->partner_oper; |
423 | ||
2d6682db | 424 | __choose_matched(lacpdu, port); |
3bf2d28a VF |
425 | /* record the new parameter values for the partner |
426 | * operational | |
427 | */ | |
b99d6ba9 HE |
428 | partner->port_number = ntohs(lacpdu->actor_port); |
429 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
430 | partner->system = lacpdu->actor_system; | |
431 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
432 | partner->key = ntohs(lacpdu->actor_key); | |
433 | partner->port_state = lacpdu->actor_state; | |
1da177e4 | 434 | |
3bf2d28a | 435 | /* set actor_oper_port_state.defaulted to FALSE */ |
1da177e4 LT |
436 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; |
437 | ||
3bf2d28a VF |
438 | /* set the partner sync. to on if the partner is sync, |
439 | * and the port is matched | |
440 | */ | |
7bfc4753 BD |
441 | if ((port->sm_vars & AD_PORT_MATCHED) |
442 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 443 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 444 | else |
b99d6ba9 | 445 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
446 | } |
447 | } | |
448 | ||
449 | /** | |
450 | * __record_default - record default parameters | |
451 | * @port: the port we're looking at | |
452 | * | |
453 | * This function records the default parameter values for the partner carried | |
454 | * in the Partner Admin parameters as the current partner operational parameter | |
455 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
456 | */ | |
457 | static void __record_default(struct port *port) | |
458 | { | |
1da177e4 | 459 | if (port) { |
3bf2d28a | 460 | /* record the partner admin parameters */ |
5eefd1ad HE |
461 | memcpy(&port->partner_oper, &port->partner_admin, |
462 | sizeof(struct port_params)); | |
1da177e4 | 463 | |
3bf2d28a | 464 | /* set actor_oper_port_state.defaulted to true */ |
1da177e4 LT |
465 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; |
466 | } | |
467 | } | |
468 | ||
469 | /** | |
470 | * __update_selected - update a port's Selected variable from a received lacpdu | |
471 | * @lacpdu: the lacpdu we've received | |
472 | * @port: the port we're looking at | |
473 | * | |
474 | * Update the value of the selected variable, using parameter values from a | |
475 | * newly received lacpdu. The parameter values for the Actor carried in the | |
476 | * received PDU are compared with the corresponding operational parameter | |
477 | * values for the ports partner. If one or more of the comparisons shows that | |
478 | * the value(s) received in the PDU differ from the current operational values, | |
479 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
480 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
481 | */ | |
482 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
483 | { | |
1da177e4 | 484 | if (lacpdu && port) { |
ce6a49ad HE |
485 | const struct port_params *partner = &port->partner_oper; |
486 | ||
815117ad | 487 | /* check if any parameter is different then |
488 | * update the state machine selected variable. | |
489 | */ | |
8e95a202 JP |
490 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
491 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
815117ad | 492 | !MAC_ADDRESS_EQUAL(&lacpdu->actor_system, &partner->system) || |
8e95a202 JP |
493 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || |
494 | ntohs(lacpdu->actor_key) != partner->key || | |
495 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
496 | port->sm_vars &= ~AD_PORT_SELECTED; |
497 | } | |
498 | } | |
499 | } | |
500 | ||
501 | /** | |
502 | * __update_default_selected - update a port's Selected variable from Partner | |
503 | * @port: the port we're looking at | |
504 | * | |
505 | * This function updates the value of the selected variable, using the partner | |
506 | * administrative parameter values. The administrative values are compared with | |
507 | * the corresponding operational parameter values for the partner. If one or | |
508 | * more of the comparisons shows that the administrative value(s) differ from | |
509 | * the current operational values, then Selected is set to FALSE and | |
510 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
511 | * Selected remains unchanged. | |
512 | */ | |
513 | static void __update_default_selected(struct port *port) | |
514 | { | |
1da177e4 | 515 | if (port) { |
3c52065f HE |
516 | const struct port_params *admin = &port->partner_admin; |
517 | const struct port_params *oper = &port->partner_oper; | |
518 | ||
815117ad | 519 | /* check if any parameter is different then |
520 | * update the state machine selected variable. | |
521 | */ | |
8e95a202 JP |
522 | if (admin->port_number != oper->port_number || |
523 | admin->port_priority != oper->port_priority || | |
815117ad | 524 | !MAC_ADDRESS_EQUAL(&admin->system, &oper->system) || |
8e95a202 JP |
525 | admin->system_priority != oper->system_priority || |
526 | admin->key != oper->key || | |
527 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 528 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
529 | port->sm_vars &= ~AD_PORT_SELECTED; |
530 | } | |
531 | } | |
532 | } | |
533 | ||
1da177e4 LT |
534 | /** |
535 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
536 | * @lacpdu: the lacpdu we've received | |
537 | * @port: the port we're looking at | |
538 | * | |
539 | * Updates the value of the ntt variable, using parameter values from a newly | |
540 | * received lacpdu. The parameter values for the partner carried in the | |
541 | * received PDU are compared with the corresponding operational parameter | |
542 | * values for the Actor. If one or more of the comparisons shows that the | |
543 | * value(s) received in the PDU differ from the current operational values, | |
544 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
545 | */ | |
546 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
547 | { | |
815117ad | 548 | /* validate lacpdu and port */ |
1da177e4 | 549 | if (lacpdu && port) { |
815117ad | 550 | /* check if any parameter is different then |
551 | * update the port->ntt. | |
552 | */ | |
89cc76f9 JV |
553 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
554 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
815117ad | 555 | !MAC_ADDRESS_EQUAL(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
556 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
557 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
558 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
559 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
560 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
561 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
562 | ) { | |
d238d458 | 563 | port->ntt = true; |
1da177e4 LT |
564 | } |
565 | } | |
566 | } | |
567 | ||
1da177e4 LT |
568 | /** |
569 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
570 | * @aggregator: the aggregator we're looking at | |
571 | * | |
572 | */ | |
573 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
574 | { | |
575 | struct port *port; | |
576 | int retval = 1; | |
577 | ||
578 | if (aggregator) { | |
3bf2d28a VF |
579 | /* scan all ports in this aggregator to verfy if they are |
580 | * all ready. | |
581 | */ | |
128ea6c3 BD |
582 | for (port = aggregator->lag_ports; |
583 | port; | |
584 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
585 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
586 | retval = 0; | |
587 | break; | |
588 | } | |
589 | } | |
590 | } | |
591 | ||
592 | return retval; | |
593 | } | |
594 | ||
595 | /** | |
596 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
597 | * @aggregator: the aggregator we're looking at | |
598 | * @val: Should the ports' ready bit be set on or off | |
599 | * | |
600 | */ | |
601 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
602 | { | |
603 | struct port *port; | |
604 | ||
128ea6c3 BD |
605 | for (port = aggregator->lag_ports; port; |
606 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 607 | if (val) |
1da177e4 | 608 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 609 | else |
1da177e4 | 610 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
611 | } |
612 | } | |
613 | ||
614 | /** | |
615 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
616 | * @aggregator: the aggregator we're looking at | |
617 | * | |
618 | */ | |
619 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
620 | { | |
128ea6c3 | 621 | u32 bandwidth = 0; |
1da177e4 LT |
622 | |
623 | if (aggregator->num_of_ports) { | |
65cce19c | 624 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
625 | case AD_LINK_SPEED_BITMASK_1MBPS: |
626 | bandwidth = aggregator->num_of_ports; | |
627 | break; | |
628 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
629 | bandwidth = aggregator->num_of_ports * 10; | |
630 | break; | |
631 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
632 | bandwidth = aggregator->num_of_ports * 100; | |
633 | break; | |
634 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
635 | bandwidth = aggregator->num_of_ports * 1000; | |
636 | break; | |
94dbffd5 JV |
637 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
638 | bandwidth = aggregator->num_of_ports * 10000; | |
639 | break; | |
1da177e4 | 640 | default: |
3bf2d28a | 641 | bandwidth = 0; /* to silence the compiler */ |
1da177e4 LT |
642 | } |
643 | } | |
644 | return bandwidth; | |
645 | } | |
646 | ||
647 | /** | |
648 | * __get_active_agg - get the current active aggregator | |
649 | * @aggregator: the aggregator we're looking at | |
49b7624e VF |
650 | * |
651 | * Caller must hold RCU lock. | |
1da177e4 LT |
652 | */ |
653 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
654 | { | |
19177e7d VF |
655 | struct bonding *bond = aggregator->slave->bond; |
656 | struct list_head *iter; | |
657 | struct slave *slave; | |
1da177e4 | 658 | |
be79bd04 | 659 | bond_for_each_slave_rcu(bond, slave, iter) |
3fdddd85 | 660 | if (SLAVE_AD_INFO(slave)->aggregator.is_active) |
661 | return &(SLAVE_AD_INFO(slave)->aggregator); | |
1da177e4 | 662 | |
19177e7d | 663 | return NULL; |
1da177e4 LT |
664 | } |
665 | ||
666 | /** | |
667 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
668 | * @port: the port we're looking at | |
1da177e4 LT |
669 | */ |
670 | static inline void __update_lacpdu_from_port(struct port *port) | |
671 | { | |
672 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 673 | const struct port_params *partner = &port->partner_oper; |
1da177e4 | 674 | |
3bf2d28a VF |
675 | /* update current actual Actor parameters |
676 | * lacpdu->subtype initialized | |
1da177e4 LT |
677 | * lacpdu->version_number initialized |
678 | * lacpdu->tlv_type_actor_info initialized | |
679 | * lacpdu->actor_information_length initialized | |
680 | */ | |
681 | ||
d3bb52b0 | 682 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 683 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
684 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
685 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
686 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
687 | lacpdu->actor_state = port->actor_oper_port_state; |
688 | ||
689 | /* lacpdu->reserved_3_1 initialized | |
690 | * lacpdu->tlv_type_partner_info initialized | |
691 | * lacpdu->partner_information_length initialized | |
692 | */ | |
693 | ||
3b5b35d0 HE |
694 | lacpdu->partner_system_priority = htons(partner->system_priority); |
695 | lacpdu->partner_system = partner->system; | |
696 | lacpdu->partner_key = htons(partner->key); | |
697 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
698 | lacpdu->partner_port = htons(partner->port_number); | |
699 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
700 | |
701 | /* lacpdu->reserved_3_2 initialized | |
702 | * lacpdu->tlv_type_collector_info initialized | |
703 | * lacpdu->collector_information_length initialized | |
704 | * collector_max_delay initialized | |
705 | * reserved_12[12] initialized | |
706 | * tlv_type_terminator initialized | |
707 | * terminator_length initialized | |
708 | * reserved_50[50] initialized | |
709 | */ | |
1da177e4 LT |
710 | } |
711 | ||
3bf2d28a | 712 | /* ================= main 802.3ad protocol code ========================= */ |
1da177e4 LT |
713 | |
714 | /** | |
715 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
716 | * @port: the port we're looking at | |
717 | * | |
718 | * Returns: 0 on success | |
719 | * < 0 on error | |
720 | */ | |
721 | static int ad_lacpdu_send(struct port *port) | |
722 | { | |
723 | struct slave *slave = port->slave; | |
724 | struct sk_buff *skb; | |
725 | struct lacpdu_header *lacpdu_header; | |
726 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
727 | |
728 | skb = dev_alloc_skb(length); | |
7bfc4753 | 729 | if (!skb) |
1da177e4 | 730 | return -ENOMEM; |
1da177e4 LT |
731 | |
732 | skb->dev = slave->dev; | |
459a98ed | 733 | skb_reset_mac_header(skb); |
b0e380b1 | 734 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
735 | skb->protocol = PKT_TYPE_LACPDU; |
736 | skb->priority = TC_PRIO_CONTROL; | |
737 | ||
738 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
739 | ||
ada0f863 | 740 | ether_addr_copy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 741 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
742 | * because we use it to identify loopback lacpdus in receive. |
743 | */ | |
ada0f863 | 744 | ether_addr_copy(lacpdu_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 745 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 746 | |
3bf2d28a | 747 | lacpdu_header->lacpdu = port->lacpdu; |
1da177e4 LT |
748 | |
749 | dev_queue_xmit(skb); | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | /** | |
755 | * ad_marker_send - send marker information/response on a given port | |
756 | * @port: the port we're looking at | |
757 | * @marker: marker data to send | |
758 | * | |
759 | * Returns: 0 on success | |
760 | * < 0 on error | |
761 | */ | |
1c3f0b8e | 762 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
763 | { |
764 | struct slave *slave = port->slave; | |
765 | struct sk_buff *skb; | |
1c3f0b8e MD |
766 | struct bond_marker_header *marker_header; |
767 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
768 | |
769 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 770 | if (!skb) |
1da177e4 | 771 | return -ENOMEM; |
1da177e4 LT |
772 | |
773 | skb_reserve(skb, 16); | |
774 | ||
775 | skb->dev = slave->dev; | |
459a98ed | 776 | skb_reset_mac_header(skb); |
b0e380b1 | 777 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
778 | skb->protocol = PKT_TYPE_LACPDU; |
779 | ||
1c3f0b8e | 780 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 781 | |
ada0f863 | 782 | ether_addr_copy(marker_header->hdr.h_dest, lacpdu_mcast_addr); |
b595076a | 783 | /* Note: source address is set to be the member's PERMANENT address, |
3bf2d28a VF |
784 | * because we use it to identify loopback MARKERs in receive. |
785 | */ | |
ada0f863 | 786 | ether_addr_copy(marker_header->hdr.h_source, slave->perm_hwaddr); |
e727149e | 787 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; |
1da177e4 | 788 | |
3bf2d28a | 789 | marker_header->marker = *marker; |
1da177e4 LT |
790 | |
791 | dev_queue_xmit(skb); | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | /** | |
797 | * ad_mux_machine - handle a port's mux state machine | |
798 | * @port: the port we're looking at | |
1da177e4 LT |
799 | */ |
800 | static void ad_mux_machine(struct port *port) | |
801 | { | |
802 | mux_states_t last_state; | |
803 | ||
3bf2d28a VF |
804 | /* keep current State Machine state to compare later if it was |
805 | * changed | |
806 | */ | |
1da177e4 LT |
807 | last_state = port->sm_mux_state; |
808 | ||
809 | if (port->sm_vars & AD_PORT_BEGIN) { | |
3bf2d28a | 810 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
811 | } else { |
812 | switch (port->sm_mux_state) { | |
813 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
814 | if ((port->sm_vars & AD_PORT_SELECTED) |
815 | || (port->sm_vars & AD_PORT_STANDBY)) | |
816 | /* if SELECTED or STANDBY */ | |
3bf2d28a | 817 | port->sm_mux_state = AD_MUX_WAITING; |
1da177e4 LT |
818 | break; |
819 | case AD_MUX_WAITING: | |
3bf2d28a VF |
820 | /* if SELECTED == FALSE return to DETACH state */ |
821 | if (!(port->sm_vars & AD_PORT_SELECTED)) { | |
1da177e4 | 822 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
823 | /* in order to withhold the Selection Logic to |
824 | * check all ports READY_N value every callback | |
825 | * cycle to update ready variable, we check | |
826 | * READY_N and update READY here | |
827 | */ | |
1da177e4 | 828 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 829 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
830 | break; |
831 | } | |
832 | ||
3bf2d28a | 833 | /* check if the wait_while_timer expired */ |
7bfc4753 BD |
834 | if (port->sm_mux_timer_counter |
835 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 836 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 | 837 | |
3bf2d28a VF |
838 | /* in order to withhold the selection logic to check |
839 | * all ports READY_N value every callback cycle to | |
840 | * update ready variable, we check READY_N and update | |
841 | * READY here | |
842 | */ | |
1da177e4 LT |
843 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
844 | ||
3bf2d28a VF |
845 | /* if the wait_while_timer expired, and the port is |
846 | * in READY state, move to ATTACHED state | |
847 | */ | |
7bfc4753 BD |
848 | if ((port->sm_vars & AD_PORT_READY) |
849 | && !port->sm_mux_timer_counter) | |
3bf2d28a | 850 | port->sm_mux_state = AD_MUX_ATTACHED; |
1da177e4 LT |
851 | break; |
852 | case AD_MUX_ATTACHED: | |
3bf2d28a VF |
853 | /* check also if agg_select_timer expired (so the |
854 | * edable port will take place only after this timer) | |
855 | */ | |
856 | if ((port->sm_vars & AD_PORT_SELECTED) && | |
857 | (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && | |
858 | !__check_agg_selection_timer(port)) { | |
859 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING; | |
860 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || | |
861 | (port->sm_vars & AD_PORT_STANDBY)) { | |
862 | /* if UNSELECTED or STANDBY */ | |
1da177e4 | 863 | port->sm_vars &= ~AD_PORT_READY_N; |
3bf2d28a VF |
864 | /* in order to withhold the selection logic to |
865 | * check all ports READY_N value every callback | |
866 | * cycle to update ready variable, we check | |
867 | * READY_N and update READY here | |
868 | */ | |
1da177e4 | 869 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); |
3bf2d28a | 870 | port->sm_mux_state = AD_MUX_DETACHED; |
1da177e4 LT |
871 | } |
872 | break; | |
873 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
3bf2d28a VF |
874 | if (!(port->sm_vars & AD_PORT_SELECTED) || |
875 | (port->sm_vars & AD_PORT_STANDBY) || | |
876 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION)) { | |
877 | port->sm_mux_state = AD_MUX_ATTACHED; | |
1da177e4 | 878 | } else { |
3bf2d28a VF |
879 | /* if port state hasn't changed make |
880 | * sure that a collecting distributing | |
881 | * port in an active aggregator is enabled | |
882 | */ | |
1da177e4 LT |
883 | if (port->aggregator && |
884 | port->aggregator->is_active && | |
885 | !__port_is_enabled(port)) { | |
886 | ||
887 | __enable_port(port); | |
888 | } | |
889 | } | |
890 | break; | |
3bf2d28a | 891 | default: |
1da177e4 LT |
892 | break; |
893 | } | |
894 | } | |
895 | ||
3bf2d28a | 896 | /* check if the state machine was changed */ |
1da177e4 | 897 | if (port->sm_mux_state != last_state) { |
a4aee5c8 JP |
898 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
899 | port->actor_port_number, last_state, | |
900 | port->sm_mux_state); | |
1da177e4 LT |
901 | switch (port->sm_mux_state) { |
902 | case AD_MUX_DETACHED: | |
1da177e4 LT |
903 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; |
904 | ad_disable_collecting_distributing(port); | |
905 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
906 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 907 | port->ntt = true; |
1da177e4 LT |
908 | break; |
909 | case AD_MUX_WAITING: | |
910 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
911 | break; | |
912 | case AD_MUX_ATTACHED: | |
1da177e4 LT |
913 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; |
914 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
915 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
916 | ad_disable_collecting_distributing(port); | |
d238d458 | 917 | port->ntt = true; |
1da177e4 LT |
918 | break; |
919 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
920 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
921 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
922 | ad_enable_collecting_distributing(port); | |
d238d458 | 923 | port->ntt = true; |
1da177e4 | 924 | break; |
3bf2d28a | 925 | default: |
1da177e4 LT |
926 | break; |
927 | } | |
928 | } | |
929 | } | |
930 | ||
931 | /** | |
932 | * ad_rx_machine - handle a port's rx State Machine | |
933 | * @lacpdu: the lacpdu we've received | |
934 | * @port: the port we're looking at | |
935 | * | |
936 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
937 | * CURRENT. If timer expired set the state machine in the proper state. | |
938 | * In other cases, this function checks if we need to switch to other state. | |
939 | */ | |
940 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
941 | { | |
942 | rx_states_t last_state; | |
943 | ||
3bf2d28a VF |
944 | /* keep current State Machine state to compare later if it was |
945 | * changed | |
946 | */ | |
1da177e4 LT |
947 | last_state = port->sm_rx_state; |
948 | ||
3bf2d28a VF |
949 | /* check if state machine should change state */ |
950 | ||
951 | /* first, check if port was reinitialized */ | |
7bfc4753 | 952 | if (port->sm_vars & AD_PORT_BEGIN) |
7bfc4753 | 953 | port->sm_rx_state = AD_RX_INITIALIZE; |
3bf2d28a | 954 | /* check if port is not enabled */ |
7bfc4753 BD |
955 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
956 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
7bfc4753 | 957 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
3bf2d28a VF |
958 | /* check if new lacpdu arrived */ |
959 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || | |
960 | (port->sm_rx_state == AD_RX_DEFAULTED) || | |
961 | (port->sm_rx_state == AD_RX_CURRENT))) { | |
962 | port->sm_rx_timer_counter = 0; | |
1da177e4 LT |
963 | port->sm_rx_state = AD_RX_CURRENT; |
964 | } else { | |
3bf2d28a VF |
965 | /* if timer is on, and if it is expired */ |
966 | if (port->sm_rx_timer_counter && | |
967 | !(--port->sm_rx_timer_counter)) { | |
1da177e4 LT |
968 | switch (port->sm_rx_state) { |
969 | case AD_RX_EXPIRED: | |
3bf2d28a | 970 | port->sm_rx_state = AD_RX_DEFAULTED; |
1da177e4 LT |
971 | break; |
972 | case AD_RX_CURRENT: | |
3bf2d28a | 973 | port->sm_rx_state = AD_RX_EXPIRED; |
1da177e4 | 974 | break; |
3bf2d28a | 975 | default: |
1da177e4 LT |
976 | break; |
977 | } | |
978 | } else { | |
3bf2d28a | 979 | /* if no lacpdu arrived and no timer is on */ |
1da177e4 LT |
980 | switch (port->sm_rx_state) { |
981 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 982 | if (port->sm_vars & AD_PORT_MOVED) |
3bf2d28a | 983 | port->sm_rx_state = AD_RX_INITIALIZE; |
7bfc4753 BD |
984 | else if (port->is_enabled |
985 | && (port->sm_vars | |
986 | & AD_PORT_LACP_ENABLED)) | |
3bf2d28a | 987 | port->sm_rx_state = AD_RX_EXPIRED; |
7bfc4753 BD |
988 | else if (port->is_enabled |
989 | && ((port->sm_vars | |
990 | & AD_PORT_LACP_ENABLED) == 0)) | |
3bf2d28a | 991 | port->sm_rx_state = AD_RX_LACP_DISABLED; |
1da177e4 | 992 | break; |
3bf2d28a | 993 | default: |
1da177e4 LT |
994 | break; |
995 | ||
996 | } | |
997 | } | |
998 | } | |
999 | ||
3bf2d28a | 1000 | /* check if the State machine was changed or new lacpdu arrived */ |
1da177e4 | 1001 | if ((port->sm_rx_state != last_state) || (lacpdu)) { |
a4aee5c8 JP |
1002 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1003 | port->actor_port_number, last_state, | |
1004 | port->sm_rx_state); | |
1da177e4 LT |
1005 | switch (port->sm_rx_state) { |
1006 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1007 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1008 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1009 | else |
1da177e4 | 1010 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1011 | port->sm_vars &= ~AD_PORT_SELECTED; |
1012 | __record_default(port); | |
1013 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1014 | port->sm_vars &= ~AD_PORT_MOVED; | |
3bf2d28a | 1015 | port->sm_rx_state = AD_RX_PORT_DISABLED; |
1da177e4 | 1016 | |
3bf2d28a | 1017 | /* Fall Through */ |
1da177e4 LT |
1018 | case AD_RX_PORT_DISABLED: |
1019 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1020 | break; | |
1021 | case AD_RX_LACP_DISABLED: | |
1022 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1023 | __record_default(port); | |
1055c9ab | 1024 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1025 | port->sm_vars |= AD_PORT_MATCHED; |
1026 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1027 | break; | |
1028 | case AD_RX_EXPIRED: | |
3bf2d28a VF |
1029 | /* Reset of the Synchronization flag (Standard 43.4.12) |
1030 | * This reset cause to disable this port in the | |
1031 | * COLLECTING_DISTRIBUTING state of the mux machine in | |
1032 | * case of EXPIRED even if LINK_DOWN didn't arrive for | |
1033 | * the port. | |
1034 | */ | |
1055c9ab | 1035 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1036 | port->sm_vars &= ~AD_PORT_MATCHED; |
3bf2d28a | 1037 | port->partner_oper.port_state |= AD_STATE_LACP_ACTIVITY; |
1da177e4 LT |
1038 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1039 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1040 | break; | |
1041 | case AD_RX_DEFAULTED: | |
1042 | __update_default_selected(port); | |
1043 | __record_default(port); | |
1044 | port->sm_vars |= AD_PORT_MATCHED; | |
1045 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1046 | break; | |
1047 | case AD_RX_CURRENT: | |
815117ad | 1048 | /* detect loopback situation */ |
3bf2d28a VF |
1049 | if (MAC_ADDRESS_EQUAL(&(lacpdu->actor_system), |
1050 | &(port->actor_system))) { | |
d4471f5e | 1051 | netdev_err(port->slave->bond->dev, "An illegal loopback occurred on adapter (%s)\n" |
90194264 | 1052 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", |
3bf2d28a | 1053 | port->slave->dev->name); |
1da177e4 LT |
1054 | return; |
1055 | } | |
1056 | __update_selected(lacpdu, port); | |
1057 | __update_ntt(lacpdu, port); | |
1058 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1059 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1060 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 | 1061 | break; |
3bf2d28a | 1062 | default: |
1da177e4 LT |
1063 | break; |
1064 | } | |
1065 | } | |
1da177e4 LT |
1066 | } |
1067 | ||
1068 | /** | |
1069 | * ad_tx_machine - handle a port's tx state machine | |
1070 | * @port: the port we're looking at | |
1da177e4 LT |
1071 | */ |
1072 | static void ad_tx_machine(struct port *port) | |
1073 | { | |
3bf2d28a VF |
1074 | /* check if tx timer expired, to verify that we do not send more than |
1075 | * 3 packets per second | |
1076 | */ | |
1da177e4 | 1077 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { |
3bf2d28a | 1078 | /* check if there is something to send */ |
1da177e4 LT |
1079 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { |
1080 | __update_lacpdu_from_port(port); | |
d238d458 | 1081 | |
1da177e4 | 1082 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1083 | pr_debug("Sent LACPDU on port %d\n", |
1084 | port->actor_port_number); | |
d238d458 | 1085 | |
3bf2d28a VF |
1086 | /* mark ntt as false, so it will not be sent |
1087 | * again until demanded | |
1088 | */ | |
d238d458 | 1089 | port->ntt = false; |
1da177e4 LT |
1090 | } |
1091 | } | |
3bf2d28a VF |
1092 | /* restart tx timer(to verify that we will not exceed |
1093 | * AD_MAX_TX_IN_SECOND | |
1094 | */ | |
1095 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1096 | } |
1097 | } | |
1098 | ||
1099 | /** | |
1100 | * ad_periodic_machine - handle a port's periodic state machine | |
1101 | * @port: the port we're looking at | |
1102 | * | |
1103 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1104 | */ | |
1105 | static void ad_periodic_machine(struct port *port) | |
1106 | { | |
1107 | periodic_states_t last_state; | |
1108 | ||
3bf2d28a | 1109 | /* keep current state machine state to compare later if it was changed */ |
1da177e4 LT |
1110 | last_state = port->sm_periodic_state; |
1111 | ||
3bf2d28a | 1112 | /* check if port was reinitialized */ |
1da177e4 | 1113 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || |
1055c9ab | 1114 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 | 1115 | ) { |
3bf2d28a | 1116 | port->sm_periodic_state = AD_NO_PERIODIC; |
1da177e4 | 1117 | } |
3bf2d28a | 1118 | /* check if state machine should change state */ |
1da177e4 | 1119 | else if (port->sm_periodic_timer_counter) { |
3bf2d28a | 1120 | /* check if periodic state machine expired */ |
1da177e4 | 1121 | if (!(--port->sm_periodic_timer_counter)) { |
3bf2d28a VF |
1122 | /* if expired then do tx */ |
1123 | port->sm_periodic_state = AD_PERIODIC_TX; | |
1da177e4 | 1124 | } else { |
3bf2d28a VF |
1125 | /* If not expired, check if there is some new timeout |
1126 | * parameter from the partner state | |
1127 | */ | |
1da177e4 LT |
1128 | switch (port->sm_periodic_state) { |
1129 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1130 | if (!(port->partner_oper.port_state |
1131 | & AD_STATE_LACP_TIMEOUT)) | |
3bf2d28a | 1132 | port->sm_periodic_state = AD_SLOW_PERIODIC; |
1da177e4 LT |
1133 | break; |
1134 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1135 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 | 1136 | port->sm_periodic_timer_counter = 0; |
3bf2d28a | 1137 | port->sm_periodic_state = AD_PERIODIC_TX; |
1da177e4 LT |
1138 | } |
1139 | break; | |
3bf2d28a | 1140 | default: |
1da177e4 LT |
1141 | break; |
1142 | } | |
1143 | } | |
1144 | } else { | |
1145 | switch (port->sm_periodic_state) { | |
1146 | case AD_NO_PERIODIC: | |
3bf2d28a | 1147 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 LT |
1148 | break; |
1149 | case AD_PERIODIC_TX: | |
3bf2d28a VF |
1150 | if (!(port->partner_oper.port_state & |
1151 | AD_STATE_LACP_TIMEOUT)) | |
1152 | port->sm_periodic_state = AD_SLOW_PERIODIC; | |
7bfc4753 | 1153 | else |
3bf2d28a | 1154 | port->sm_periodic_state = AD_FAST_PERIODIC; |
1da177e4 | 1155 | break; |
3bf2d28a | 1156 | default: |
1da177e4 LT |
1157 | break; |
1158 | } | |
1159 | } | |
1160 | ||
3bf2d28a | 1161 | /* check if the state machine was changed */ |
1da177e4 | 1162 | if (port->sm_periodic_state != last_state) { |
a4aee5c8 JP |
1163 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1164 | port->actor_port_number, last_state, | |
1165 | port->sm_periodic_state); | |
1da177e4 LT |
1166 | switch (port->sm_periodic_state) { |
1167 | case AD_NO_PERIODIC: | |
3bf2d28a | 1168 | port->sm_periodic_timer_counter = 0; |
1da177e4 LT |
1169 | break; |
1170 | case AD_FAST_PERIODIC: | |
3bf2d28a VF |
1171 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1172 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; | |
1da177e4 LT |
1173 | break; |
1174 | case AD_SLOW_PERIODIC: | |
3bf2d28a VF |
1175 | /* decrement 1 tick we lost in the PERIODIC_TX cycle */ |
1176 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; | |
1da177e4 LT |
1177 | break; |
1178 | case AD_PERIODIC_TX: | |
d238d458 | 1179 | port->ntt = true; |
1da177e4 | 1180 | break; |
3bf2d28a | 1181 | default: |
1da177e4 LT |
1182 | break; |
1183 | } | |
1184 | } | |
1185 | } | |
1186 | ||
1187 | /** | |
1188 | * ad_port_selection_logic - select aggregation groups | |
1189 | * @port: the port we're looking at | |
1190 | * | |
1191 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1192 | * selection logic is called in the inititalization (after all the handshkes), | |
1193 | * and after every lacpdu receive (if selected is off). | |
1194 | */ | |
1195 | static void ad_port_selection_logic(struct port *port) | |
1196 | { | |
1197 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1198 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1199 | struct list_head *iter; |
1200 | struct bonding *bond; | |
1201 | struct slave *slave; | |
1da177e4 LT |
1202 | int found = 0; |
1203 | ||
3bf2d28a | 1204 | /* if the port is already Selected, do nothing */ |
7bfc4753 | 1205 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1206 | return; |
1da177e4 | 1207 | |
3e36bb75 VF |
1208 | bond = __get_bond_by_port(port); |
1209 | ||
3bf2d28a | 1210 | /* if the port is connected to other aggregator, detach it */ |
1da177e4 | 1211 | if (port->aggregator) { |
3bf2d28a | 1212 | /* detach the port from its former aggregator */ |
128ea6c3 BD |
1213 | temp_aggregator = port->aggregator; |
1214 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1215 | last_port = curr_port, | |
3bf2d28a | 1216 | curr_port = curr_port->next_port_in_aggregator) { |
1da177e4 LT |
1217 | if (curr_port == port) { |
1218 | temp_aggregator->num_of_ports--; | |
3bf2d28a VF |
1219 | /* if it is the first port attached to the |
1220 | * aggregator | |
1221 | */ | |
1222 | if (!last_port) { | |
128ea6c3 BD |
1223 | temp_aggregator->lag_ports = |
1224 | port->next_port_in_aggregator; | |
3bf2d28a VF |
1225 | } else { |
1226 | /* not the first port attached to the | |
1227 | * aggregator | |
1228 | */ | |
128ea6c3 BD |
1229 | last_port->next_port_in_aggregator = |
1230 | port->next_port_in_aggregator; | |
1da177e4 LT |
1231 | } |
1232 | ||
3bf2d28a VF |
1233 | /* clear the port's relations to this |
1234 | * aggregator | |
1235 | */ | |
1da177e4 | 1236 | port->aggregator = NULL; |
128ea6c3 BD |
1237 | port->next_port_in_aggregator = NULL; |
1238 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1239 | |
d4471f5e VF |
1240 | netdev_dbg(bond->dev, "Port %d left LAG %d\n", |
1241 | port->actor_port_number, | |
1242 | temp_aggregator->aggregator_identifier); | |
3bf2d28a VF |
1243 | /* if the aggregator is empty, clear its |
1244 | * parameters, and set it ready to be attached | |
1245 | */ | |
7bfc4753 | 1246 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1247 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1248 | break; |
1249 | } | |
1250 | } | |
3bf2d28a VF |
1251 | if (!curr_port) { |
1252 | /* meaning: the port was related to an aggregator | |
1253 | * but was not on the aggregator port list | |
1254 | */ | |
d4471f5e VF |
1255 | net_warn_ratelimited("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
1256 | port->slave->bond->dev->name, | |
1257 | port->actor_port_number, | |
1258 | port->slave->dev->name, | |
1259 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1260 | } |
1261 | } | |
3bf2d28a | 1262 | /* search on all aggregators for a suitable aggregator for this port */ |
3e36bb75 | 1263 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 1264 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 | 1265 | |
3bf2d28a | 1266 | /* keep a free aggregator for later use(if needed) */ |
1da177e4 | 1267 | if (!aggregator->lag_ports) { |
7bfc4753 | 1268 | if (!free_aggregator) |
128ea6c3 | 1269 | free_aggregator = aggregator; |
1da177e4 LT |
1270 | continue; |
1271 | } | |
815117ad | 1272 | /* check if current aggregator suits us */ |
1273 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && /* if all parameters match AND */ | |
1274 | MAC_ADDRESS_EQUAL(&(aggregator->partner_system), &(port->partner_oper.system)) && | |
1055c9ab HE |
1275 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && |
1276 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1277 | ) && |
815117ad | 1278 | ((!MAC_ADDRESS_EQUAL(&(port->partner_oper.system), &(null_mac_addr)) && /* partner answers */ |
1279 | !aggregator->is_individual) /* but is not individual OR */ | |
1da177e4 LT |
1280 | ) |
1281 | ) { | |
815117ad | 1282 | /* attach to the founded aggregator */ |
1da177e4 | 1283 | port->aggregator = aggregator; |
128ea6c3 BD |
1284 | port->actor_port_aggregator_identifier = |
1285 | port->aggregator->aggregator_identifier; | |
1286 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1287 | port->aggregator->num_of_ports++; |
128ea6c3 | 1288 | aggregator->lag_ports = port; |
d4471f5e VF |
1289 | netdev_dbg(bond->dev, "Port %d joined LAG %d(existing LAG)\n", |
1290 | port->actor_port_number, | |
1291 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1292 | |
3bf2d28a | 1293 | /* mark this port as selected */ |
1da177e4 LT |
1294 | port->sm_vars |= AD_PORT_SELECTED; |
1295 | found = 1; | |
1296 | break; | |
1297 | } | |
1298 | } | |
1299 | ||
3bf2d28a VF |
1300 | /* the port couldn't find an aggregator - attach it to a new |
1301 | * aggregator | |
1302 | */ | |
1da177e4 LT |
1303 | if (!found) { |
1304 | if (free_aggregator) { | |
3bf2d28a | 1305 | /* assign port a new aggregator */ |
1da177e4 | 1306 | port->aggregator = free_aggregator; |
128ea6c3 BD |
1307 | port->actor_port_aggregator_identifier = |
1308 | port->aggregator->aggregator_identifier; | |
1da177e4 | 1309 | |
3bf2d28a VF |
1310 | /* update the new aggregator's parameters |
1311 | * if port was responsed from the end-user | |
1312 | */ | |
7bfc4753 BD |
1313 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1314 | /* if port is full duplex */ | |
1624db7b | 1315 | port->aggregator->is_individual = false; |
7bfc4753 | 1316 | else |
1624db7b | 1317 | port->aggregator->is_individual = true; |
1da177e4 LT |
1318 | |
1319 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1320 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1321 | port->aggregator->partner_system = |
1322 | port->partner_oper.system; | |
1323 | port->aggregator->partner_system_priority = | |
1324 | port->partner_oper.system_priority; | |
1055c9ab | 1325 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1326 | port->aggregator->receive_state = 1; |
1327 | port->aggregator->transmit_state = 1; | |
1328 | port->aggregator->lag_ports = port; | |
1329 | port->aggregator->num_of_ports++; | |
1330 | ||
3bf2d28a | 1331 | /* mark this port as selected */ |
1da177e4 LT |
1332 | port->sm_vars |= AD_PORT_SELECTED; |
1333 | ||
d4471f5e VF |
1334 | netdev_dbg(bond->dev, "Port %d joined LAG %d(new LAG)\n", |
1335 | port->actor_port_number, | |
1336 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1337 | } else { |
d4471f5e | 1338 | netdev_err(bond->dev, "Port %d (on %s) did not find a suitable aggregator\n", |
1da177e4 LT |
1339 | port->actor_port_number, port->slave->dev->name); |
1340 | } | |
1341 | } | |
3bf2d28a VF |
1342 | /* if all aggregator's ports are READY_N == TRUE, set ready=TRUE |
1343 | * in all aggregator's ports, else set ready=FALSE in all | |
1344 | * aggregator's ports | |
1345 | */ | |
1346 | __set_agg_ports_ready(port->aggregator, | |
1347 | __agg_ports_are_ready(port->aggregator)); | |
1da177e4 | 1348 | |
fd989c83 JV |
1349 | aggregator = __get_first_agg(port); |
1350 | ad_agg_selection_logic(aggregator); | |
1351 | } | |
1352 | ||
3bf2d28a | 1353 | /* Decide if "agg" is a better choice for the new active aggregator that |
fd989c83 JV |
1354 | * the current best, according to the ad_select policy. |
1355 | */ | |
1356 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1357 | struct aggregator *curr) | |
1358 | { | |
3bf2d28a | 1359 | /* 0. If no best, select current. |
fd989c83 JV |
1360 | * |
1361 | * 1. If the current agg is not individual, and the best is | |
1362 | * individual, select current. | |
1363 | * | |
1364 | * 2. If current agg is individual and the best is not, keep best. | |
1365 | * | |
1366 | * 3. Therefore, current and best are both individual or both not | |
1367 | * individual, so: | |
1368 | * | |
1369 | * 3a. If current agg partner replied, and best agg partner did not, | |
1370 | * select current. | |
1371 | * | |
1372 | * 3b. If current agg partner did not reply and best agg partner | |
1373 | * did reply, keep best. | |
1374 | * | |
1375 | * 4. Therefore, current and best both have partner replies or | |
1376 | * both do not, so perform selection policy: | |
1377 | * | |
1378 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1379 | * select by bandwidth. | |
1380 | * | |
1381 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1382 | */ | |
1383 | if (!best) | |
1384 | return curr; | |
1385 | ||
1386 | if (!curr->is_individual && best->is_individual) | |
1387 | return curr; | |
1388 | ||
1389 | if (curr->is_individual && !best->is_individual) | |
1390 | return best; | |
1391 | ||
1392 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1393 | return curr; | |
1394 | ||
1395 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1396 | return best; | |
1397 | ||
1398 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1399 | case BOND_AD_COUNT: | |
1400 | if (curr->num_of_ports > best->num_of_ports) | |
1401 | return curr; | |
1402 | ||
1403 | if (curr->num_of_ports < best->num_of_ports) | |
1404 | return best; | |
1405 | ||
1406 | /*FALLTHROUGH*/ | |
1407 | case BOND_AD_STABLE: | |
1408 | case BOND_AD_BANDWIDTH: | |
1409 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1410 | return curr; | |
1411 | ||
1412 | break; | |
1413 | ||
1414 | default: | |
d4471f5e VF |
1415 | net_warn_ratelimited("%s: Impossible agg select mode %d\n", |
1416 | curr->slave->bond->dev->name, | |
1417 | __get_agg_selection_mode(curr->lag_ports)); | |
fd989c83 | 1418 | break; |
1da177e4 | 1419 | } |
fd989c83 JV |
1420 | |
1421 | return best; | |
1da177e4 LT |
1422 | } |
1423 | ||
4cd6fe1c SH |
1424 | static int agg_device_up(const struct aggregator *agg) |
1425 | { | |
2430af8b | 1426 | struct port *port = agg->lag_ports; |
3bf2d28a | 1427 | |
2430af8b JB |
1428 | if (!port) |
1429 | return 0; | |
3bf2d28a VF |
1430 | |
1431 | return netif_running(port->slave->dev) && | |
1432 | netif_carrier_ok(port->slave->dev); | |
4cd6fe1c SH |
1433 | } |
1434 | ||
1da177e4 LT |
1435 | /** |
1436 | * ad_agg_selection_logic - select an aggregation group for a team | |
1437 | * @aggregator: the aggregator we're looking at | |
1438 | * | |
1439 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1440 | * |
1441 | * The logic of this function is to select the aggregator according to | |
1442 | * the ad_select policy: | |
1443 | * | |
1444 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1445 | * it, and to reselect the active aggregator only if the previous | |
1446 | * aggregator has no more ports related to it. | |
1447 | * | |
1448 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1449 | * bandwidth, and reselect whenever a link state change takes place or the | |
1450 | * set of slaves in the bond changes. | |
1451 | * | |
1452 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1453 | * (slaves), and reselect whenever a link state change takes place or the | |
1454 | * set of slaves in the bond changes. | |
1da177e4 LT |
1455 | * |
1456 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1457 | * __get_active_agg() won't work correctly. This function should be better | |
1458 | * called with the bond itself, and retrieve the first agg from it. | |
1459 | */ | |
fd989c83 | 1460 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1461 | { |
fd989c83 | 1462 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1463 | struct bonding *bond = agg->slave->bond; |
1464 | struct list_head *iter; | |
1465 | struct slave *slave; | |
1da177e4 | 1466 | struct port *port; |
1da177e4 | 1467 | |
49b7624e | 1468 | rcu_read_lock(); |
fd989c83 | 1469 | origin = agg; |
fd989c83 | 1470 | active = __get_active_agg(agg); |
4cd6fe1c | 1471 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1472 | |
be79bd04 | 1473 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1474 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
bef1fcce | 1475 | |
fd989c83 JV |
1476 | agg->is_active = 0; |
1477 | ||
4cd6fe1c | 1478 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1479 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1480 | } |
fd989c83 JV |
1481 | |
1482 | if (best && | |
1483 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
3bf2d28a | 1484 | /* For the STABLE policy, don't replace the old active |
fd989c83 JV |
1485 | * aggregator if it's still active (it has an answering |
1486 | * partner) or if both the best and active don't have an | |
1487 | * answering partner. | |
1488 | */ | |
1489 | if (active && active->lag_ports && | |
1490 | active->lag_ports->is_enabled && | |
1491 | (__agg_has_partner(active) || | |
3bf2d28a VF |
1492 | (!__agg_has_partner(active) && |
1493 | !__agg_has_partner(best)))) { | |
fd989c83 JV |
1494 | if (!(!active->actor_oper_aggregator_key && |
1495 | best->actor_oper_aggregator_key)) { | |
1496 | best = NULL; | |
1497 | active->is_active = 1; | |
1da177e4 LT |
1498 | } |
1499 | } | |
fd989c83 | 1500 | } |
1da177e4 | 1501 | |
fd989c83 JV |
1502 | if (best && (best == active)) { |
1503 | best = NULL; | |
1504 | active->is_active = 1; | |
1da177e4 LT |
1505 | } |
1506 | ||
be79bd04 | 1507 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1508 | if (best) { |
d4471f5e VF |
1509 | netdev_dbg(bond->dev, "best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1510 | best->aggregator_identifier, best->num_of_ports, | |
1511 | best->actor_oper_aggregator_key, | |
1512 | best->partner_oper_aggregator_key, | |
1513 | best->is_individual, best->is_active); | |
1514 | netdev_dbg(bond->dev, "best ports %p slave %p %s\n", | |
1515 | best->lag_ports, best->slave, | |
1516 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1517 | |
be79bd04 | 1518 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 1519 | agg = &(SLAVE_AD_INFO(slave)->aggregator); |
fd989c83 | 1520 | |
d4471f5e VF |
1521 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
1522 | agg->aggregator_identifier, agg->num_of_ports, | |
1523 | agg->actor_oper_aggregator_key, | |
1524 | agg->partner_oper_aggregator_key, | |
1525 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1526 | } |
1527 | ||
be79bd04 | 1528 | /* check if any partner replys */ |
fd989c83 | 1529 | if (best->is_individual) { |
d4471f5e VF |
1530 | net_warn_ratelimited("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
1531 | best->slave ? | |
1532 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1533 | } |
1534 | ||
fd989c83 | 1535 | best->is_active = 1; |
d4471f5e VF |
1536 | netdev_dbg(bond->dev, "LAG %d chosen as the active LAG\n", |
1537 | best->aggregator_identifier); | |
1538 | netdev_dbg(bond->dev, "Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", | |
1539 | best->aggregator_identifier, best->num_of_ports, | |
1540 | best->actor_oper_aggregator_key, | |
1541 | best->partner_oper_aggregator_key, | |
1542 | best->is_individual, best->is_active); | |
1da177e4 | 1543 | |
3bf2d28a VF |
1544 | /* disable the ports that were related to the former |
1545 | * active_aggregator | |
1546 | */ | |
fd989c83 JV |
1547 | if (active) { |
1548 | for (port = active->lag_ports; port; | |
1549 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1550 | __disable_port(port); |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | ||
3bf2d28a | 1555 | /* if the selected aggregator is of join individuals |
fd989c83 JV |
1556 | * (partner_system is NULL), enable their ports |
1557 | */ | |
1558 | active = __get_active_agg(origin); | |
1da177e4 | 1559 | |
fd989c83 JV |
1560 | if (active) { |
1561 | if (!__agg_has_partner(active)) { | |
1562 | for (port = active->lag_ports; port; | |
1563 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1564 | __enable_port(port); |
1565 | } | |
1566 | } | |
1567 | } | |
fd989c83 | 1568 | |
be79bd04 | 1569 | rcu_read_unlock(); |
1570 | ||
bef1fcce | 1571 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1572 | } |
1573 | ||
1574 | /** | |
1575 | * ad_clear_agg - clear a given aggregator's parameters | |
1576 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1577 | */ |
1578 | static void ad_clear_agg(struct aggregator *aggregator) | |
1579 | { | |
1580 | if (aggregator) { | |
1624db7b | 1581 | aggregator->is_individual = false; |
1da177e4 LT |
1582 | aggregator->actor_admin_aggregator_key = 0; |
1583 | aggregator->actor_oper_aggregator_key = 0; | |
1584 | aggregator->partner_system = null_mac_addr; | |
1585 | aggregator->partner_system_priority = 0; | |
1586 | aggregator->partner_oper_aggregator_key = 0; | |
1587 | aggregator->receive_state = 0; | |
1588 | aggregator->transmit_state = 0; | |
1589 | aggregator->lag_ports = NULL; | |
1590 | aggregator->is_active = 0; | |
1591 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1592 | pr_debug("LAG %d was cleared\n", |
1593 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1594 | } |
1595 | } | |
1596 | ||
1597 | /** | |
1598 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1599 | * @aggregator: the aggregator we're looking at | |
1da177e4 LT |
1600 | */ |
1601 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1602 | { | |
1603 | if (aggregator) { | |
1604 | ad_clear_agg(aggregator); | |
1605 | ||
1606 | aggregator->aggregator_mac_address = null_mac_addr; | |
1607 | aggregator->aggregator_identifier = 0; | |
1608 | aggregator->slave = NULL; | |
1609 | } | |
1610 | } | |
1611 | ||
1612 | /** | |
1613 | * ad_initialize_port - initialize a given port's parameters | |
1614 | * @aggregator: the aggregator we're looking at | |
1615 | * @lacp_fast: boolean. whether fast periodic should be used | |
1da177e4 LT |
1616 | */ |
1617 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1618 | { | |
c7e703d0 HE |
1619 | static const struct port_params tmpl = { |
1620 | .system_priority = 0xffff, | |
1621 | .key = 1, | |
1622 | .port_number = 1, | |
1623 | .port_priority = 0xff, | |
1624 | .port_state = 1, | |
1625 | }; | |
7addeef6 HE |
1626 | static const struct lacpdu lacpdu = { |
1627 | .subtype = 0x01, | |
1628 | .version_number = 0x01, | |
1629 | .tlv_type_actor_info = 0x01, | |
1630 | .actor_information_length = 0x14, | |
1631 | .tlv_type_partner_info = 0x02, | |
1632 | .partner_information_length = 0x14, | |
1633 | .tlv_type_collector_info = 0x03, | |
1634 | .collector_information_length = 0x10, | |
1635 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1636 | }; | |
c7e703d0 | 1637 | |
1da177e4 LT |
1638 | if (port) { |
1639 | port->actor_port_number = 1; | |
1640 | port->actor_port_priority = 0xff; | |
1641 | port->actor_system = null_mac_addr; | |
1642 | port->actor_system_priority = 0xffff; | |
1643 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1644 | port->ntt = false; |
1da177e4 LT |
1645 | port->actor_admin_port_key = 1; |
1646 | port->actor_oper_port_key = 1; | |
3bf2d28a VF |
1647 | port->actor_admin_port_state = AD_STATE_AGGREGATION | |
1648 | AD_STATE_LACP_ACTIVITY; | |
1649 | port->actor_oper_port_state = AD_STATE_AGGREGATION | | |
1650 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 | 1651 | |
7bfc4753 | 1652 | if (lacp_fast) |
1da177e4 | 1653 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1654 | |
c7e703d0 HE |
1655 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1656 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1657 | ||
f48127b6 | 1658 | port->is_enabled = true; |
3bf2d28a | 1659 | /* private parameters */ |
1da177e4 LT |
1660 | port->sm_vars = 0x3; |
1661 | port->sm_rx_state = 0; | |
1662 | port->sm_rx_timer_counter = 0; | |
1663 | port->sm_periodic_state = 0; | |
1664 | port->sm_periodic_timer_counter = 0; | |
1665 | port->sm_mux_state = 0; | |
1666 | port->sm_mux_timer_counter = 0; | |
1667 | port->sm_tx_state = 0; | |
1668 | port->sm_tx_timer_counter = 0; | |
1669 | port->slave = NULL; | |
1670 | port->aggregator = NULL; | |
1671 | port->next_port_in_aggregator = NULL; | |
1672 | port->transaction_id = 0; | |
1673 | ||
7addeef6 | 1674 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1675 | } |
1676 | } | |
1677 | ||
1678 | /** | |
1679 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1680 | * @port: the port we're looking at | |
1681 | * | |
1682 | * Enable @port if it's in an active aggregator | |
1683 | */ | |
1684 | static void ad_enable_collecting_distributing(struct port *port) | |
1685 | { | |
1686 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1687 | pr_debug("Enabling port %d(LAG %d)\n", |
1688 | port->actor_port_number, | |
1689 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1690 | __enable_port(port); |
1691 | } | |
1692 | } | |
1693 | ||
1694 | /** | |
1695 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1696 | * @port: the port we're looking at | |
1da177e4 LT |
1697 | */ |
1698 | static void ad_disable_collecting_distributing(struct port *port) | |
1699 | { | |
3bf2d28a VF |
1700 | if (port->aggregator && |
1701 | !MAC_ADDRESS_EQUAL(&(port->aggregator->partner_system), | |
1702 | &(null_mac_addr))) { | |
a4aee5c8 JP |
1703 | pr_debug("Disabling port %d(LAG %d)\n", |
1704 | port->actor_port_number, | |
1705 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1706 | __disable_port(port); |
1707 | } | |
1708 | } | |
1709 | ||
1da177e4 LT |
1710 | /** |
1711 | * ad_marker_info_received - handle receive of a Marker information frame | |
1712 | * @marker_info: Marker info received | |
1713 | * @port: the port we're looking at | |
1da177e4 | 1714 | */ |
1c3f0b8e MD |
1715 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1716 | struct port *port) | |
1da177e4 | 1717 | { |
1c3f0b8e | 1718 | struct bond_marker marker; |
1da177e4 | 1719 | |
3bf2d28a | 1720 | /* copy the received marker data to the response marker */ |
1c3f0b8e | 1721 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
3bf2d28a | 1722 | /* change the marker subtype to marker response */ |
128ea6c3 | 1723 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 | 1724 | |
3bf2d28a | 1725 | /* send the marker response */ |
1da177e4 | 1726 | if (ad_marker_send(port, &marker) >= 0) { |
a4aee5c8 JP |
1727 | pr_debug("Sent Marker Response on port %d\n", |
1728 | port->actor_port_number); | |
1da177e4 LT |
1729 | } |
1730 | } | |
1731 | ||
1732 | /** | |
1733 | * ad_marker_response_received - handle receive of a marker response frame | |
1734 | * @marker: marker PDU received | |
1735 | * @port: the port we're looking at | |
1736 | * | |
1737 | * This function does nothing since we decided not to implement send and handle | |
1738 | * response for marker PDU's, in this stage, but only to respond to marker | |
1739 | * information. | |
1740 | */ | |
1c3f0b8e | 1741 | static void ad_marker_response_received(struct bond_marker *marker, |
3bf2d28a | 1742 | struct port *port) |
1da177e4 | 1743 | { |
3bf2d28a VF |
1744 | marker = NULL; |
1745 | port = NULL; | |
1746 | /* DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW */ | |
1da177e4 LT |
1747 | } |
1748 | ||
3bf2d28a | 1749 | /* ========= AD exported functions to the main bonding code ========= */ |
1da177e4 | 1750 | |
3bf2d28a | 1751 | /* Check aggregators status in team every T seconds */ |
1da177e4 LT |
1752 | #define AD_AGGREGATOR_SELECTION_TIMER 8 |
1753 | ||
3bf2d28a VF |
1754 | /** |
1755 | * bond_3ad_initiate_agg_selection - initate aggregator selection | |
1756 | * @bond: bonding struct | |
fd989c83 JV |
1757 | * |
1758 | * Set the aggregation selection timer, to initiate an agg selection in | |
1759 | * the very near future. Called during first initialization, and during | |
1760 | * any down to up transitions of the bond. | |
1761 | */ | |
1762 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1763 | { | |
1764 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1765 | } |
1766 | ||
1da177e4 LT |
1767 | /** |
1768 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1769 | * @bond: bonding struct to work on | |
1770 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1771 | * |
1772 | * Can be called only after the mac address of the bond is set. | |
1773 | */ | |
56d00c67 | 1774 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1775 | { |
815117ad | 1776 | /* check that the bond is not initialized yet */ |
1777 | if (!MAC_ADDRESS_EQUAL(&(BOND_AD_INFO(bond).system.sys_mac_addr), | |
3a6d54c5 | 1778 | bond->dev->dev_addr)) { |
1da177e4 | 1779 | |
163c8ff3 | 1780 | BOND_AD_INFO(bond).aggregator_identifier = 0; |
1da177e4 | 1781 | |
1da177e4 LT |
1782 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1783 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1784 | ||
3bf2d28a VF |
1785 | /* initialize how many times this module is called in one |
1786 | * second (should be about every 100ms) | |
1787 | */ | |
1da177e4 LT |
1788 | ad_ticks_per_sec = tick_resolution; |
1789 | ||
fd989c83 JV |
1790 | bond_3ad_initiate_agg_selection(bond, |
1791 | AD_AGGREGATOR_SELECTION_TIMER * | |
1792 | ad_ticks_per_sec); | |
1da177e4 LT |
1793 | } |
1794 | } | |
1795 | ||
1796 | /** | |
1797 | * bond_3ad_bind_slave - initialize a slave's port | |
1798 | * @slave: slave struct to work on | |
1799 | * | |
1800 | * Returns: 0 on success | |
1801 | * < 0 on error | |
1802 | */ | |
359632e5 | 1803 | void bond_3ad_bind_slave(struct slave *slave) |
1da177e4 LT |
1804 | { |
1805 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1806 | struct port *port; | |
1807 | struct aggregator *aggregator; | |
1808 | ||
359632e5 | 1809 | /* check that the slave has not been initialized yet. */ |
3fdddd85 | 1810 | if (SLAVE_AD_INFO(slave)->port.slave != slave) { |
1da177e4 | 1811 | |
359632e5 | 1812 | /* port initialization */ |
3fdddd85 | 1813 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 1814 | |
bf0239a9 | 1815 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 LT |
1816 | |
1817 | port->slave = slave; | |
3fdddd85 | 1818 | port->actor_port_number = SLAVE_AD_INFO(slave)->id; |
359632e5 | 1819 | /* key is determined according to the link speed, duplex and user key(which |
1820 | * is yet not supported) | |
359632e5 | 1821 | */ |
3bf2d28a | 1822 | port->actor_admin_port_key = 0; |
1da177e4 LT |
1823 | port->actor_admin_port_key |= __get_duplex(port); |
1824 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1825 | port->actor_oper_port_key = port->actor_admin_port_key; | |
3bf2d28a VF |
1826 | /* if the port is not full duplex, then the port should be not |
1827 | * lacp Enabled | |
1828 | */ | |
7bfc4753 | 1829 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1830 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
359632e5 | 1831 | /* actor system is the bond's system */ |
1da177e4 | 1832 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; |
3bf2d28a VF |
1833 | /* tx timer(to verify that no more than MAX_TX_IN_SECOND |
1834 | * lacpdu's are sent in one second) | |
1835 | */ | |
1da177e4 LT |
1836 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; |
1837 | port->aggregator = NULL; | |
1838 | port->next_port_in_aggregator = NULL; | |
1839 | ||
1840 | __disable_port(port); | |
1da177e4 | 1841 | |
359632e5 | 1842 | /* aggregator initialization */ |
3fdddd85 | 1843 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1da177e4 LT |
1844 | |
1845 | ad_initialize_agg(aggregator); | |
1846 | ||
1847 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
163c8ff3 | 1848 | aggregator->aggregator_identifier = ++BOND_AD_INFO(bond).aggregator_identifier; |
1da177e4 LT |
1849 | aggregator->slave = slave; |
1850 | aggregator->is_active = 0; | |
1851 | aggregator->num_of_ports = 0; | |
1852 | } | |
1da177e4 LT |
1853 | } |
1854 | ||
1855 | /** | |
1856 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1857 | * @slave: slave struct to work on | |
1858 | * | |
1859 | * Search for the aggregator that is related to this port, remove the | |
1860 | * aggregator and assign another aggregator for other port related to it | |
1861 | * (if any), and remove the port. | |
1862 | */ | |
1863 | void bond_3ad_unbind_slave(struct slave *slave) | |
1864 | { | |
1865 | struct port *port, *prev_port, *temp_port; | |
1866 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1867 | int select_new_active_agg = 0; | |
0b088264 VF |
1868 | struct bonding *bond = slave->bond; |
1869 | struct slave *slave_iter; | |
1870 | struct list_head *iter; | |
a361c83c | 1871 | |
e470259f NA |
1872 | /* Sync against bond_3ad_state_machine_handler() */ |
1873 | spin_lock_bh(&bond->mode_lock); | |
3fdddd85 | 1874 | aggregator = &(SLAVE_AD_INFO(slave)->aggregator); |
1875 | port = &(SLAVE_AD_INFO(slave)->port); | |
1da177e4 | 1876 | |
3bf2d28a | 1877 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 1878 | if (!port->slave) { |
d4471f5e VF |
1879 | netdev_warn(bond->dev, "Trying to unbind an uninitialized port on %s\n", |
1880 | slave->dev->name); | |
e470259f | 1881 | goto out; |
1da177e4 LT |
1882 | } |
1883 | ||
d4471f5e VF |
1884 | netdev_dbg(bond->dev, "Unbinding Link Aggregation Group %d\n", |
1885 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1886 | |
1887 | /* Tell the partner that this port is not suitable for aggregation */ | |
1888 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1889 | __update_lacpdu_from_port(port); | |
1890 | ad_lacpdu_send(port); | |
1891 | ||
3bf2d28a | 1892 | /* check if this aggregator is occupied */ |
1da177e4 | 1893 | if (aggregator->lag_ports) { |
3bf2d28a VF |
1894 | /* check if there are other ports related to this aggregator |
1895 | * except the port related to this slave(thats ensure us that | |
1896 | * there is a reason to search for new aggregator, and that we | |
1897 | * will find one | |
1898 | */ | |
1899 | if ((aggregator->lag_ports != port) || | |
1900 | (aggregator->lag_ports->next_port_in_aggregator)) { | |
1901 | /* find new aggregator for the related port(s) */ | |
0b088264 | 1902 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1903 | new_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
3bf2d28a VF |
1904 | /* if the new aggregator is empty, or it is |
1905 | * connected to our port only | |
1906 | */ | |
1907 | if (!new_aggregator->lag_ports || | |
1908 | ((new_aggregator->lag_ports == port) && | |
1909 | !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1910 | break; |
1da177e4 | 1911 | } |
0b088264 VF |
1912 | if (!slave_iter) |
1913 | new_aggregator = NULL; | |
3bf2d28a VF |
1914 | |
1915 | /* if new aggregator found, copy the aggregator's | |
1916 | * parameters and connect the related lag_ports to the | |
1917 | * new aggregator | |
1918 | */ | |
1da177e4 | 1919 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { |
d4471f5e VF |
1920 | netdev_dbg(bond->dev, "Some port(s) related to LAG %d - replacing with LAG %d\n", |
1921 | aggregator->aggregator_identifier, | |
1922 | new_aggregator->aggregator_identifier); | |
1da177e4 | 1923 | |
3bf2d28a VF |
1924 | if ((new_aggregator->lag_ports == port) && |
1925 | new_aggregator->is_active) { | |
d4471f5e | 1926 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
1da177e4 LT |
1927 | select_new_active_agg = 1; |
1928 | } | |
1929 | ||
1930 | new_aggregator->is_individual = aggregator->is_individual; | |
1931 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1932 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1933 | new_aggregator->partner_system = aggregator->partner_system; | |
1934 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1935 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1936 | new_aggregator->receive_state = aggregator->receive_state; | |
1937 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1938 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1939 | new_aggregator->is_active = aggregator->is_active; | |
1940 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1941 | ||
3bf2d28a VF |
1942 | /* update the information that is written on |
1943 | * the ports about the aggregator | |
1944 | */ | |
128ea6c3 BD |
1945 | for (temp_port = aggregator->lag_ports; temp_port; |
1946 | temp_port = temp_port->next_port_in_aggregator) { | |
1947 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1948 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1949 | } | |
1950 | ||
1da177e4 | 1951 | ad_clear_agg(aggregator); |
a361c83c | 1952 | |
7bfc4753 | 1953 | if (select_new_active_agg) |
1da177e4 | 1954 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 1955 | } else { |
d4471f5e | 1956 | netdev_warn(bond->dev, "unbinding aggregator, and could not find a new aggregator for its ports\n"); |
1da177e4 | 1957 | } |
3bf2d28a VF |
1958 | } else { |
1959 | /* in case that the only port related to this | |
1960 | * aggregator is the one we want to remove | |
1961 | */ | |
1da177e4 | 1962 | select_new_active_agg = aggregator->is_active; |
1da177e4 LT |
1963 | ad_clear_agg(aggregator); |
1964 | if (select_new_active_agg) { | |
d4471f5e | 1965 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1966 | /* select new active aggregator */ |
74684493 VF |
1967 | temp_aggregator = __get_first_agg(port); |
1968 | if (temp_aggregator) | |
1969 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
1970 | } |
1971 | } | |
1972 | } | |
1973 | ||
d4471f5e | 1974 | netdev_dbg(bond->dev, "Unbinding port %d\n", port->actor_port_number); |
3bf2d28a VF |
1975 | |
1976 | /* find the aggregator that this port is connected to */ | |
0b088264 | 1977 | bond_for_each_slave(bond, slave_iter, iter) { |
3fdddd85 | 1978 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter)->aggregator); |
1da177e4 | 1979 | prev_port = NULL; |
3bf2d28a | 1980 | /* search the port in the aggregator's related ports */ |
128ea6c3 BD |
1981 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
1982 | prev_port = temp_port, | |
3bf2d28a VF |
1983 | temp_port = temp_port->next_port_in_aggregator) { |
1984 | if (temp_port == port) { | |
1985 | /* the aggregator found - detach the port from | |
1986 | * this aggregator | |
1987 | */ | |
7bfc4753 | 1988 | if (prev_port) |
1da177e4 | 1989 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 1990 | else |
1da177e4 | 1991 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 1992 | temp_aggregator->num_of_ports--; |
128ea6c3 | 1993 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 | 1994 | select_new_active_agg = temp_aggregator->is_active; |
1da177e4 LT |
1995 | ad_clear_agg(temp_aggregator); |
1996 | if (select_new_active_agg) { | |
d4471f5e | 1997 | netdev_info(bond->dev, "Removing an active aggregator\n"); |
3bf2d28a | 1998 | /* select new active aggregator */ |
1da177e4 LT |
1999 | ad_agg_selection_logic(__get_first_agg(port)); |
2000 | } | |
2001 | } | |
2002 | break; | |
2003 | } | |
2004 | } | |
2005 | } | |
128ea6c3 | 2006 | port->slave = NULL; |
e470259f NA |
2007 | |
2008 | out: | |
2009 | spin_unlock_bh(&bond->mode_lock); | |
1da177e4 LT |
2010 | } |
2011 | ||
2012 | /** | |
2013 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2014 | * @bond: bonding struct to work on | |
2015 | * | |
2016 | * The state machine handling concept in this module is to check every tick | |
2017 | * which state machine should operate any function. The execution order is | |
2018 | * round robin, so when we have an interaction between state machines, the | |
2019 | * reply of one to each other might be delayed until next tick. | |
2020 | * | |
2021 | * This function also complete the initialization when the agg_select_timer | |
2022 | * times out, and it selects an aggregator for the ports that are yet not | |
2023 | * related to any aggregator, and selects the active aggregator for a bond. | |
2024 | */ | |
1b76b316 | 2025 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2026 | { |
1b76b316 JV |
2027 | struct bonding *bond = container_of(work, struct bonding, |
2028 | ad_work.work); | |
1da177e4 | 2029 | struct aggregator *aggregator; |
3c4c88a1 VF |
2030 | struct list_head *iter; |
2031 | struct slave *slave; | |
2032 | struct port *port; | |
5e5b0665 | 2033 | bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER; |
1da177e4 | 2034 | |
e470259f NA |
2035 | /* Lock to protect data accessed by all (e.g., port->sm_vars) and |
2036 | * against running with bond_3ad_unbind_slave. ad_rx_machine may run | |
2037 | * concurrently due to incoming LACPDU as well. | |
2038 | */ | |
b7435628 | 2039 | spin_lock_bh(&bond->mode_lock); |
be79bd04 | 2040 | rcu_read_lock(); |
1f2cd845 | 2041 | |
be79bd04 | 2042 | /* check if there are any slaves */ |
0965a1f3 | 2043 | if (!bond_has_slaves(bond)) |
1da177e4 | 2044 | goto re_arm; |
1da177e4 | 2045 | |
be79bd04 | 2046 | /* check if agg_select_timer timer after initialize is timed out */ |
3bf2d28a VF |
2047 | if (BOND_AD_INFO(bond).agg_select_timer && |
2048 | !(--BOND_AD_INFO(bond).agg_select_timer)) { | |
be79bd04 | 2049 | slave = bond_first_slave_rcu(bond); |
3fdddd85 | 2050 | port = slave ? &(SLAVE_AD_INFO(slave)->port) : NULL; |
fe9323da | 2051 | |
be79bd04 | 2052 | /* select the active aggregator for the bond */ |
fe9323da | 2053 | if (port) { |
1da177e4 | 2054 | if (!port->slave) { |
d4471f5e VF |
2055 | net_warn_ratelimited("%s: Warning: bond's first port is uninitialized\n", |
2056 | bond->dev->name); | |
1da177e4 LT |
2057 | goto re_arm; |
2058 | } | |
2059 | ||
2060 | aggregator = __get_first_agg(port); | |
2061 | ad_agg_selection_logic(aggregator); | |
2062 | } | |
f0c76d61 | 2063 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2064 | } |
2065 | ||
be79bd04 | 2066 | /* for each port run the state machines */ |
2067 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3fdddd85 | 2068 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2069 | if (!port->slave) { |
d4471f5e | 2070 | net_warn_ratelimited("%s: Warning: Found an uninitialized port\n", |
86a2b9cf | 2071 | bond->dev->name); |
1da177e4 LT |
2072 | goto re_arm; |
2073 | } | |
2074 | ||
2075 | ad_rx_machine(NULL, port); | |
2076 | ad_periodic_machine(port); | |
2077 | ad_port_selection_logic(port); | |
2078 | ad_mux_machine(port); | |
2079 | ad_tx_machine(port); | |
2080 | ||
be79bd04 | 2081 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2082 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2083 | port->sm_vars &= ~AD_PORT_BEGIN; |
1da177e4 LT |
2084 | } |
2085 | ||
2086 | re_arm: | |
5e5b0665 | 2087 | bond_for_each_slave_rcu(bond, slave, iter) { |
2088 | if (slave->should_notify) { | |
2089 | should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW; | |
2090 | break; | |
2091 | } | |
2092 | } | |
be79bd04 | 2093 | rcu_read_unlock(); |
b7435628 | 2094 | spin_unlock_bh(&bond->mode_lock); |
5e5b0665 | 2095 | |
2096 | if (should_notify_rtnl && rtnl_trylock()) { | |
b0929915 | 2097 | bond_slave_state_notify(bond); |
5e5b0665 | 2098 | rtnl_unlock(); |
2099 | } | |
be79bd04 | 2100 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2101 | } |
2102 | ||
2103 | /** | |
2104 | * bond_3ad_rx_indication - handle a received frame | |
2105 | * @lacpdu: received lacpdu | |
2106 | * @slave: slave struct to work on | |
2107 | * @length: length of the data received | |
2108 | * | |
2109 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2110 | * received frames (loopback). Since only the payload is given to this | |
2111 | * function, it check for loopback. | |
2112 | */ | |
3bf2d28a VF |
2113 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, |
2114 | u16 length) | |
1da177e4 LT |
2115 | { |
2116 | struct port *port; | |
13a8e0c8 | 2117 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2118 | |
2119 | if (length >= sizeof(struct lacpdu)) { | |
2120 | ||
3fdddd85 | 2121 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2122 | |
2123 | if (!port->slave) { | |
d4471f5e VF |
2124 | net_warn_ratelimited("%s: Warning: port of slave %s is uninitialized\n", |
2125 | slave->dev->name, slave->bond->dev->name); | |
13a8e0c8 | 2126 | return ret; |
1da177e4 LT |
2127 | } |
2128 | ||
2129 | switch (lacpdu->subtype) { | |
2130 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2131 | ret = RX_HANDLER_CONSUMED; |
d4471f5e VF |
2132 | netdev_dbg(slave->bond->dev, "Received LACPDU on port %d\n", |
2133 | port->actor_port_number); | |
16d79d7d | 2134 | /* Protect against concurrent state machines */ |
e470259f | 2135 | spin_lock(&slave->bond->mode_lock); |
1da177e4 | 2136 | ad_rx_machine(lacpdu, port); |
e470259f | 2137 | spin_unlock(&slave->bond->mode_lock); |
1da177e4 LT |
2138 | break; |
2139 | ||
2140 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2141 | ret = RX_HANDLER_CONSUMED; |
3bf2d28a VF |
2142 | /* No need to convert fields to Little Endian since we |
2143 | * don't use the marker's fields. | |
2144 | */ | |
1da177e4 | 2145 | |
1c3f0b8e | 2146 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2147 | case AD_MARKER_INFORMATION_SUBTYPE: |
d4471f5e VF |
2148 | netdev_dbg(slave->bond->dev, "Received Marker Information on port %d\n", |
2149 | port->actor_port_number); | |
1c3f0b8e | 2150 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2151 | break; |
2152 | ||
2153 | case AD_MARKER_RESPONSE_SUBTYPE: | |
d4471f5e VF |
2154 | netdev_dbg(slave->bond->dev, "Received Marker Response on port %d\n", |
2155 | port->actor_port_number); | |
1c3f0b8e | 2156 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2157 | break; |
2158 | ||
2159 | default: | |
d4471f5e VF |
2160 | netdev_dbg(slave->bond->dev, "Received an unknown Marker subtype on slot %d\n", |
2161 | port->actor_port_number); | |
1da177e4 LT |
2162 | } |
2163 | } | |
2164 | } | |
13a8e0c8 | 2165 | return ret; |
1da177e4 LT |
2166 | } |
2167 | ||
2168 | /** | |
2169 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2170 | * @slave: slave struct to work on | |
2171 | * | |
2172 | * Handle reselection of aggregator (if needed) for this port. | |
2173 | */ | |
2174 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2175 | { | |
2176 | struct port *port; | |
2177 | ||
3fdddd85 | 2178 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2179 | |
71a06c59 | 2180 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2181 | if (!port->slave) { |
d4471f5e VF |
2182 | netdev_warn(slave->bond->dev, "speed changed for uninitialized port on %s\n", |
2183 | slave->dev->name); | |
1da177e4 LT |
2184 | return; |
2185 | } | |
2186 | ||
e470259f | 2187 | spin_lock_bh(&slave->bond->mode_lock); |
71a06c59 | 2188 | |
1da177e4 | 2189 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2190 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2191 | (__get_link_speed(port) << 1); | |
d4471f5e | 2192 | netdev_dbg(slave->bond->dev, "Port %d changed speed\n", port->actor_port_number); |
71a06c59 | 2193 | /* there is no need to reselect a new aggregator, just signal the |
2194 | * state machines to reinitialize | |
2195 | */ | |
1da177e4 | 2196 | port->sm_vars |= AD_PORT_BEGIN; |
71a06c59 | 2197 | |
e470259f | 2198 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2199 | } |
2200 | ||
2201 | /** | |
2202 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2203 | * @slave: slave struct to work on | |
2204 | * | |
2205 | * Handle reselection of aggregator (if needed) for this port. | |
2206 | */ | |
2207 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2208 | { | |
2209 | struct port *port; | |
2210 | ||
3fdddd85 | 2211 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2212 | |
bca44a73 | 2213 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2214 | if (!port->slave) { |
d4471f5e VF |
2215 | netdev_warn(slave->bond->dev, "duplex changed for uninitialized port on %s\n", |
2216 | slave->dev->name); | |
1da177e4 LT |
2217 | return; |
2218 | } | |
2219 | ||
e470259f | 2220 | spin_lock_bh(&slave->bond->mode_lock); |
bca44a73 | 2221 | |
1da177e4 | 2222 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2223 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2224 | __get_duplex(port); | |
d4471f5e | 2225 | netdev_dbg(slave->bond->dev, "Port %d changed duplex\n", port->actor_port_number); |
bca44a73 | 2226 | /* there is no need to reselect a new aggregator, just signal the |
2227 | * state machines to reinitialize | |
2228 | */ | |
1da177e4 | 2229 | port->sm_vars |= AD_PORT_BEGIN; |
bca44a73 | 2230 | |
e470259f | 2231 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2232 | } |
2233 | ||
2234 | /** | |
2235 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2236 | * @slave: slave struct to work on | |
2237 | * @status: whether the link is now up or down | |
2238 | * | |
2239 | * Handle reselection of aggregator (if needed) for this port. | |
2240 | */ | |
2241 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2242 | { | |
2243 | struct port *port; | |
2244 | ||
3fdddd85 | 2245 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 | 2246 | |
108db736 | 2247 | /* if slave is null, the whole port is not initialized */ |
1da177e4 | 2248 | if (!port->slave) { |
d4471f5e VF |
2249 | netdev_warn(slave->bond->dev, "link status changed for uninitialized port on %s\n", |
2250 | slave->dev->name); | |
1da177e4 LT |
2251 | return; |
2252 | } | |
2253 | ||
e470259f | 2254 | spin_lock_bh(&slave->bond->mode_lock); |
108db736 | 2255 | /* on link down we are zeroing duplex and speed since |
2256 | * some of the adaptors(ce1000.lan) report full duplex/speed | |
2257 | * instead of N/A(duplex) / 0(speed). | |
2258 | * | |
2259 | * on link up we are forcing recheck on the duplex and speed since | |
2260 | * some of he adaptors(ce1000.lan) report. | |
2261 | */ | |
1da177e4 | 2262 | if (link == BOND_LINK_UP) { |
f48127b6 | 2263 | port->is_enabled = true; |
1da177e4 | 2264 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2265 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2266 | __get_duplex(port); | |
1da177e4 | 2267 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2268 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2269 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2270 | } else { |
2271 | /* link has failed */ | |
f48127b6 | 2272 | port->is_enabled = false; |
1da177e4 | 2273 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2274 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2275 | ~AD_SPEED_KEY_BITS); | |
1da177e4 | 2276 | } |
d4471f5e VF |
2277 | netdev_dbg(slave->bond->dev, "Port %d changed link status to %s\n", |
2278 | port->actor_port_number, | |
2279 | link == BOND_LINK_UP ? "UP" : "DOWN"); | |
108db736 | 2280 | /* there is no need to reselect a new aggregator, just signal the |
2281 | * state machines to reinitialize | |
2282 | */ | |
1da177e4 | 2283 | port->sm_vars |= AD_PORT_BEGIN; |
108db736 | 2284 | |
e470259f | 2285 | spin_unlock_bh(&slave->bond->mode_lock); |
1da177e4 LT |
2286 | } |
2287 | ||
3bf2d28a VF |
2288 | /** |
2289 | * bond_3ad_set_carrier - set link state for bonding master | |
2290 | * @bond - bonding structure | |
2291 | * | |
2292 | * if we have an active aggregator, we're up, if not, we're down. | |
2293 | * Presumes that we cannot have an active aggregator if there are | |
2294 | * no slaves with link up. | |
ff59c456 | 2295 | * |
031ae4de JV |
2296 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2297 | * | |
ff59c456 JV |
2298 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2299 | * change, nonzero if it does. | |
2300 | */ | |
2301 | int bond_3ad_set_carrier(struct bonding *bond) | |
2302 | { | |
655f8919 | 2303 | struct aggregator *active; |
dec1e90e | 2304 | struct slave *first_slave; |
c1bc9644 | 2305 | int ret = 1; |
655f8919 | 2306 | |
be79bd04 | 2307 | rcu_read_lock(); |
2308 | first_slave = bond_first_slave_rcu(bond); | |
c1bc9644 VF |
2309 | if (!first_slave) { |
2310 | ret = 0; | |
2311 | goto out; | |
2312 | } | |
3fdddd85 | 2313 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave)->aggregator)); |
655f8919 | 2314 | if (active) { |
2315 | /* are enough slaves available to consider link up? */ | |
2316 | if (active->num_of_ports < bond->params.min_links) { | |
2317 | if (netif_carrier_ok(bond->dev)) { | |
2318 | netif_carrier_off(bond->dev); | |
c1bc9644 | 2319 | goto out; |
655f8919 | 2320 | } |
2321 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 | 2322 | netif_carrier_on(bond->dev); |
c1bc9644 | 2323 | goto out; |
ff59c456 | 2324 | } |
c1bc9644 | 2325 | } else if (netif_carrier_ok(bond->dev)) { |
ff59c456 | 2326 | netif_carrier_off(bond->dev); |
ff59c456 | 2327 | } |
c1bc9644 VF |
2328 | out: |
2329 | rcu_read_unlock(); | |
2330 | return ret; | |
ff59c456 JV |
2331 | } |
2332 | ||
1da177e4 | 2333 | /** |
318debd8 | 2334 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2335 | * @bond: bonding struct to work on |
2336 | * @ad_info: ad_info struct to fill with the bond's info | |
2337 | * | |
2338 | * Returns: 0 on success | |
2339 | * < 0 on error | |
2340 | */ | |
318debd8 | 2341 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2342 | struct ad_info *ad_info) | |
1da177e4 LT |
2343 | { |
2344 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2345 | struct list_head *iter; |
2346 | struct slave *slave; | |
1da177e4 LT |
2347 | struct port *port; |
2348 | ||
47e91f56 | 2349 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2350 | port = &(SLAVE_AD_INFO(slave)->port); |
1da177e4 LT |
2351 | if (port->aggregator && port->aggregator->is_active) { |
2352 | aggregator = port->aggregator; | |
2353 | break; | |
2354 | } | |
2355 | } | |
2356 | ||
21f374c6 JP |
2357 | if (!aggregator) |
2358 | return -1; | |
2359 | ||
2360 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2361 | ad_info->ports = aggregator->num_of_ports; | |
2362 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2363 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2364 | ether_addr_copy(ad_info->partner_system, | |
2365 | aggregator->partner_system.mac_addr_value); | |
2366 | return 0; | |
1da177e4 LT |
2367 | } |
2368 | ||
318debd8 | 2369 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) |
2370 | { | |
2371 | int ret; | |
2372 | ||
47e91f56 | 2373 | rcu_read_lock(); |
318debd8 | 2374 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2375 | rcu_read_unlock(); |
318debd8 | 2376 | |
2377 | return ret; | |
2378 | } | |
2379 | ||
1da177e4 LT |
2380 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2381 | { | |
454d7c9b | 2382 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2383 | struct slave *slave, *first_ok_slave; |
2384 | struct aggregator *agg; | |
2385 | struct ad_info ad_info; | |
9caff1e7 | 2386 | struct list_head *iter; |
1da177e4 | 2387 | int slaves_in_agg; |
c33d7887 | 2388 | int slave_agg_no; |
c33d7887 | 2389 | int agg_id; |
1da177e4 | 2390 | |
318debd8 | 2391 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
d4471f5e | 2392 | netdev_dbg(dev, "__bond_3ad_get_active_agg_info failed\n"); |
a742e1f5 | 2393 | goto err_free; |
1da177e4 LT |
2394 | } |
2395 | ||
2396 | slaves_in_agg = ad_info.ports; | |
2397 | agg_id = ad_info.aggregator_id; | |
2398 | ||
2399 | if (slaves_in_agg == 0) { | |
d4471f5e | 2400 | netdev_dbg(dev, "active aggregator is empty\n"); |
a742e1f5 | 2401 | goto err_free; |
1da177e4 LT |
2402 | } |
2403 | ||
ee62e868 | 2404 | slave_agg_no = bond_xmit_hash(bond, skb) % slaves_in_agg; |
c33d7887 | 2405 | first_ok_slave = NULL; |
1da177e4 | 2406 | |
47e91f56 | 2407 | bond_for_each_slave_rcu(bond, slave, iter) { |
3fdddd85 | 2408 | agg = SLAVE_AD_INFO(slave)->port.aggregator; |
c33d7887 VF |
2409 | if (!agg || agg->aggregator_identifier != agg_id) |
2410 | continue; | |
1da177e4 | 2411 | |
c33d7887 | 2412 | if (slave_agg_no >= 0) { |
8557cd74 | 2413 | if (!first_ok_slave && bond_slave_can_tx(slave)) |
c33d7887 | 2414 | first_ok_slave = slave; |
1da177e4 | 2415 | slave_agg_no--; |
c33d7887 VF |
2416 | continue; |
2417 | } | |
2418 | ||
8557cd74 | 2419 | if (bond_slave_can_tx(slave)) { |
a742e1f5 | 2420 | bond_dev_queue_xmit(bond, skb, slave->dev); |
c33d7887 | 2421 | goto out; |
1da177e4 LT |
2422 | } |
2423 | } | |
2424 | ||
2425 | if (slave_agg_no >= 0) { | |
d4471f5e VF |
2426 | netdev_err(dev, "Couldn't find a slave to tx on for aggregator ID %d\n", |
2427 | agg_id); | |
a742e1f5 | 2428 | goto err_free; |
1da177e4 LT |
2429 | } |
2430 | ||
c33d7887 | 2431 | /* we couldn't find any suitable slave after the agg_no, so use the |
3bf2d28a VF |
2432 | * first suitable found, if found. |
2433 | */ | |
c33d7887 | 2434 | if (first_ok_slave) |
a742e1f5 | 2435 | bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); |
2436 | else | |
2437 | goto err_free; | |
1da177e4 LT |
2438 | |
2439 | out: | |
ec634fe3 | 2440 | return NETDEV_TX_OK; |
a742e1f5 | 2441 | err_free: |
2442 | /* no suitable interface, frame not sent */ | |
2bb77ab4 | 2443 | dev_kfree_skb_any(skb); |
a742e1f5 | 2444 | goto out; |
1da177e4 LT |
2445 | } |
2446 | ||
de063b70 ED |
2447 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2448 | struct slave *slave) | |
1da177e4 | 2449 | { |
de063b70 ED |
2450 | struct lacpdu *lacpdu, _lacpdu; |
2451 | ||
3aba891d | 2452 | if (skb->protocol != PKT_TYPE_LACPDU) |
86e74986 | 2453 | return RX_HANDLER_ANOTHER; |
b3053251 | 2454 | |
de063b70 ED |
2455 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2456 | if (!lacpdu) | |
86e74986 | 2457 | return RX_HANDLER_ANOTHER; |
ab12811c | 2458 | |
86e74986 | 2459 | return bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2460 | } |
ba824a8b | 2461 | |
3bf2d28a VF |
2462 | /** |
2463 | * bond_3ad_update_lacp_rate - change the lacp rate | |
2464 | * @bond - bonding struct | |
2465 | * | |
ba824a8b PP |
2466 | * When modify lacp_rate parameter via sysfs, |
2467 | * update actor_oper_port_state of each port. | |
2468 | * | |
e470259f | 2469 | * Hold bond->mode_lock, |
ba824a8b PP |
2470 | * so we can modify port->actor_oper_port_state, |
2471 | * no matter bond is up or down. | |
2472 | */ | |
2473 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2474 | { | |
ba824a8b | 2475 | struct port *port = NULL; |
9caff1e7 | 2476 | struct list_head *iter; |
c509316b | 2477 | struct slave *slave; |
ba824a8b PP |
2478 | int lacp_fast; |
2479 | ||
ba824a8b | 2480 | lacp_fast = bond->params.lacp_fast; |
e470259f | 2481 | spin_lock_bh(&bond->mode_lock); |
9caff1e7 | 2482 | bond_for_each_slave(bond, slave, iter) { |
3fdddd85 | 2483 | port = &(SLAVE_AD_INFO(slave)->port); |
ba824a8b PP |
2484 | if (lacp_fast) |
2485 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2486 | else | |
2487 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
ba824a8b | 2488 | } |
e470259f | 2489 | spin_unlock_bh(&bond->mode_lock); |
ba824a8b | 2490 | } |