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1da177e4 LT |
1 | /* |
2 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the Free | |
6 | * Software Foundation; either version 2 of the License, or (at your option) | |
7 | * any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 | |
16 | * Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
1da177e4 LT |
21 | */ |
22 | ||
a4aee5c8 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 LT |
25 | #include <linux/skbuff.h> |
26 | #include <linux/if_ether.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/ethtool.h> | |
fd989c83 | 30 | #include <linux/etherdevice.h> |
1da177e4 LT |
31 | #include <linux/if_bonding.h> |
32 | #include <linux/pkt_sched.h> | |
e730c155 | 33 | #include <net/net_namespace.h> |
1da177e4 LT |
34 | #include "bonding.h" |
35 | #include "bond_3ad.h" | |
36 | ||
37 | // General definitions | |
38 | #define AD_SHORT_TIMEOUT 1 | |
39 | #define AD_LONG_TIMEOUT 0 | |
40 | #define AD_STANDBY 0x2 | |
41 | #define AD_MAX_TX_IN_SECOND 3 | |
42 | #define AD_COLLECTOR_MAX_DELAY 0 | |
43 | ||
44 | // Timer definitions(43.4.4 in the 802.3ad standard) | |
45 | #define AD_FAST_PERIODIC_TIME 1 | |
46 | #define AD_SLOW_PERIODIC_TIME 30 | |
47 | #define AD_SHORT_TIMEOUT_TIME (3*AD_FAST_PERIODIC_TIME) | |
48 | #define AD_LONG_TIMEOUT_TIME (3*AD_SLOW_PERIODIC_TIME) | |
49 | #define AD_CHURN_DETECTION_TIME 60 | |
50 | #define AD_AGGREGATE_WAIT_TIME 2 | |
51 | ||
52 | // Port state definitions(43.4.2.2 in the 802.3ad standard) | |
53 | #define AD_STATE_LACP_ACTIVITY 0x1 | |
54 | #define AD_STATE_LACP_TIMEOUT 0x2 | |
55 | #define AD_STATE_AGGREGATION 0x4 | |
56 | #define AD_STATE_SYNCHRONIZATION 0x8 | |
57 | #define AD_STATE_COLLECTING 0x10 | |
58 | #define AD_STATE_DISTRIBUTING 0x20 | |
59 | #define AD_STATE_DEFAULTED 0x40 | |
60 | #define AD_STATE_EXPIRED 0x80 | |
61 | ||
62 | // Port Variables definitions used by the State Machines(43.4.7 in the 802.3ad standard) | |
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 | ||
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 | #define AD_DUPLEX_KEY_BITS 0x1 | |
82 | #define AD_SPEED_KEY_BITS 0x3E | |
83 | #define AD_USER_KEY_BITS 0xFFC0 | |
84 | ||
85 | //dalloun | |
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 LT |
91 | //endalloun |
92 | ||
93 | // compare MAC addresses | |
94 | #define MAC_ADDRESS_COMPARE(A, B) memcmp(A, B, ETH_ALEN) | |
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 | ||
1da177e4 LT |
102 | // ================= main 802.3ad protocol functions ================== |
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); | |
1c3f0b8e MD |
116 | static void ad_marker_info_received(struct bond_marker *marker_info, struct port *port); |
117 | static void ad_marker_response_received(struct bond_marker *marker, struct port *port); | |
1da177e4 LT |
118 | |
119 | ||
120 | ///////////////////////////////////////////////////////////////////////////////// | |
121 | // ================= api to bonding and kernel code ================== | |
122 | ///////////////////////////////////////////////////////////////////////////////// | |
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. | |
144 | */ | |
145 | static inline struct aggregator *__get_first_agg(struct port *port) | |
146 | { | |
147 | struct bonding *bond = __get_bond_by_port(port); | |
dec1e90e | 148 | struct slave *first_slave; |
1da177e4 | 149 | |
be79bd04 | 150 | /* If there's no bond for this port, or bond has no slaves */ |
dec1e90e | 151 | if (bond == NULL) |
1da177e4 | 152 | return NULL; |
be79bd04 | 153 | rcu_read_lock(); |
154 | first_slave = bond_first_slave_rcu(bond); | |
155 | rcu_read_unlock(); | |
dec1e90e | 156 | return first_slave ? &(SLAVE_AD_INFO(first_slave).aggregator) : NULL; |
1da177e4 LT |
157 | } |
158 | ||
fd989c83 JV |
159 | /* |
160 | * __agg_has_partner | |
161 | * | |
162 | * Return nonzero if aggregator has a partner (denoted by a non-zero ether | |
163 | * address for the partner). Return 0 if not. | |
164 | */ | |
165 | static inline int __agg_has_partner(struct aggregator *agg) | |
166 | { | |
167 | return !is_zero_ether_addr(agg->partner_system.mac_addr_value); | |
168 | } | |
169 | ||
1da177e4 LT |
170 | /** |
171 | * __disable_port - disable the port's slave | |
172 | * @port: the port we're looking at | |
173 | * | |
174 | */ | |
175 | static inline void __disable_port(struct port *port) | |
176 | { | |
177 | bond_set_slave_inactive_flags(port->slave); | |
178 | } | |
179 | ||
180 | /** | |
181 | * __enable_port - enable the port's slave, if it's up | |
182 | * @port: the port we're looking at | |
183 | * | |
184 | */ | |
185 | static inline void __enable_port(struct port *port) | |
186 | { | |
187 | struct slave *slave = port->slave; | |
188 | ||
7bfc4753 | 189 | if ((slave->link == BOND_LINK_UP) && IS_UP(slave->dev)) |
1da177e4 | 190 | bond_set_slave_active_flags(slave); |
1da177e4 LT |
191 | } |
192 | ||
193 | /** | |
194 | * __port_is_enabled - check if the port's slave is in active state | |
195 | * @port: the port we're looking at | |
196 | * | |
197 | */ | |
198 | static inline int __port_is_enabled(struct port *port) | |
199 | { | |
e30bc066 | 200 | return bond_is_active_slave(port->slave); |
1da177e4 LT |
201 | } |
202 | ||
203 | /** | |
204 | * __get_agg_selection_mode - get the aggregator selection mode | |
205 | * @port: the port we're looking at | |
206 | * | |
fd989c83 | 207 | * Get the aggregator selection mode. Can be %STABLE, %BANDWIDTH or %COUNT. |
1da177e4 LT |
208 | */ |
209 | static inline u32 __get_agg_selection_mode(struct port *port) | |
210 | { | |
211 | struct bonding *bond = __get_bond_by_port(port); | |
212 | ||
7bfc4753 | 213 | if (bond == NULL) |
fd989c83 | 214 | return BOND_AD_STABLE; |
1da177e4 | 215 | |
1a14fbcb | 216 | return bond->params.ad_select; |
1da177e4 LT |
217 | } |
218 | ||
219 | /** | |
220 | * __check_agg_selection_timer - check if the selection timer has expired | |
221 | * @port: the port we're looking at | |
222 | * | |
223 | */ | |
224 | static inline int __check_agg_selection_timer(struct port *port) | |
225 | { | |
226 | struct bonding *bond = __get_bond_by_port(port); | |
227 | ||
7bfc4753 | 228 | if (bond == NULL) |
1da177e4 | 229 | return 0; |
1da177e4 LT |
230 | |
231 | return BOND_AD_INFO(bond).agg_select_timer ? 1 : 0; | |
232 | } | |
233 | ||
234 | /** | |
9ac3524a | 235 | * __get_state_machine_lock - lock the port's state machines |
1da177e4 LT |
236 | * @port: the port we're looking at |
237 | * | |
238 | */ | |
9ac3524a | 239 | static inline void __get_state_machine_lock(struct port *port) |
1da177e4 | 240 | { |
9ac3524a | 241 | spin_lock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
242 | } |
243 | ||
244 | /** | |
9ac3524a | 245 | * __release_state_machine_lock - unlock the port's state machines |
1da177e4 LT |
246 | * @port: the port we're looking at |
247 | * | |
248 | */ | |
9ac3524a | 249 | static inline void __release_state_machine_lock(struct port *port) |
1da177e4 | 250 | { |
9ac3524a | 251 | spin_unlock_bh(&(SLAVE_AD_INFO(port->slave).state_machine_lock)); |
1da177e4 LT |
252 | } |
253 | ||
254 | /** | |
255 | * __get_link_speed - get a port's speed | |
256 | * @port: the port we're looking at | |
257 | * | |
258 | * Return @port's speed in 802.3ad bitmask format. i.e. one of: | |
259 | * 0, | |
260 | * %AD_LINK_SPEED_BITMASK_10MBPS, | |
261 | * %AD_LINK_SPEED_BITMASK_100MBPS, | |
94dbffd5 JV |
262 | * %AD_LINK_SPEED_BITMASK_1000MBPS, |
263 | * %AD_LINK_SPEED_BITMASK_10000MBPS | |
1da177e4 LT |
264 | */ |
265 | static u16 __get_link_speed(struct port *port) | |
266 | { | |
267 | struct slave *slave = port->slave; | |
268 | u16 speed; | |
269 | ||
270 | /* this if covers only a special case: when the configuration starts with | |
271 | * link down, it sets the speed to 0. | |
272 | * This is done in spite of the fact that the e100 driver reports 0 to be | |
273 | * compatible with MVT in the future.*/ | |
7bfc4753 | 274 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 275 | speed = 0; |
7bfc4753 | 276 | else { |
1da177e4 LT |
277 | switch (slave->speed) { |
278 | case SPEED_10: | |
279 | speed = AD_LINK_SPEED_BITMASK_10MBPS; | |
280 | break; | |
281 | ||
282 | case SPEED_100: | |
283 | speed = AD_LINK_SPEED_BITMASK_100MBPS; | |
284 | break; | |
285 | ||
286 | case SPEED_1000: | |
287 | speed = AD_LINK_SPEED_BITMASK_1000MBPS; | |
288 | break; | |
289 | ||
94dbffd5 JV |
290 | case SPEED_10000: |
291 | speed = AD_LINK_SPEED_BITMASK_10000MBPS; | |
292 | break; | |
293 | ||
1da177e4 LT |
294 | default: |
295 | speed = 0; // unknown speed value from ethtool. shouldn't happen | |
296 | break; | |
297 | } | |
298 | } | |
299 | ||
a4aee5c8 JP |
300 | pr_debug("Port %d Received link speed %d update from adapter\n", |
301 | port->actor_port_number, speed); | |
1da177e4 LT |
302 | return speed; |
303 | } | |
304 | ||
305 | /** | |
306 | * __get_duplex - get a port's duplex | |
307 | * @port: the port we're looking at | |
308 | * | |
309 | * Return @port's duplex in 802.3ad bitmask format. i.e.: | |
310 | * 0x01 if in full duplex | |
311 | * 0x00 otherwise | |
312 | */ | |
313 | static u8 __get_duplex(struct port *port) | |
314 | { | |
315 | struct slave *slave = port->slave; | |
316 | ||
317 | u8 retval; | |
318 | ||
319 | // handling a special case: when the configuration starts with | |
320 | // link down, it sets the duplex to 0. | |
7bfc4753 | 321 | if (slave->link != BOND_LINK_UP) |
128ea6c3 | 322 | retval = 0x0; |
7bfc4753 | 323 | else { |
1da177e4 LT |
324 | switch (slave->duplex) { |
325 | case DUPLEX_FULL: | |
128ea6c3 | 326 | retval = 0x1; |
a4aee5c8 JP |
327 | pr_debug("Port %d Received status full duplex update from adapter\n", |
328 | port->actor_port_number); | |
1da177e4 LT |
329 | break; |
330 | case DUPLEX_HALF: | |
331 | default: | |
128ea6c3 | 332 | retval = 0x0; |
a4aee5c8 JP |
333 | pr_debug("Port %d Received status NOT full duplex update from adapter\n", |
334 | port->actor_port_number); | |
1da177e4 LT |
335 | break; |
336 | } | |
337 | } | |
338 | return retval; | |
339 | } | |
340 | ||
341 | /** | |
9ac3524a | 342 | * __initialize_port_locks - initialize a port's STATE machine spinlock |
e0809dbc | 343 | * @port: the slave of the port we're looking at |
1da177e4 LT |
344 | * |
345 | */ | |
e0809dbc | 346 | static inline void __initialize_port_locks(struct slave *slave) |
1da177e4 LT |
347 | { |
348 | // make sure it isn't called twice | |
e0809dbc | 349 | spin_lock_init(&(SLAVE_AD_INFO(slave).state_machine_lock)); |
1da177e4 LT |
350 | } |
351 | ||
352 | //conversions | |
1da177e4 LT |
353 | |
354 | /** | |
355 | * __ad_timer_to_ticks - convert a given timer type to AD module ticks | |
356 | * @timer_type: which timer to operate | |
357 | * @par: timer parameter. see below | |
358 | * | |
359 | * If @timer_type is %current_while_timer, @par indicates long/short timer. | |
360 | * If @timer_type is %periodic_timer, @par is one of %FAST_PERIODIC_TIME, | |
361 | * %SLOW_PERIODIC_TIME. | |
362 | */ | |
363 | static u16 __ad_timer_to_ticks(u16 timer_type, u16 par) | |
364 | { | |
128ea6c3 | 365 | u16 retval = 0; /* to silence the compiler */ |
1da177e4 LT |
366 | |
367 | switch (timer_type) { | |
368 | case AD_CURRENT_WHILE_TIMER: // for rx machine usage | |
7bfc4753 | 369 | if (par) |
1da177e4 | 370 | retval = (AD_SHORT_TIMEOUT_TIME*ad_ticks_per_sec); // short timeout |
7bfc4753 | 371 | else |
1da177e4 | 372 | retval = (AD_LONG_TIMEOUT_TIME*ad_ticks_per_sec); // long timeout |
1da177e4 LT |
373 | break; |
374 | case AD_ACTOR_CHURN_TIMER: // for local churn machine | |
375 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
376 | break; | |
377 | case AD_PERIODIC_TIMER: // for periodic machine | |
378 | retval = (par*ad_ticks_per_sec); // long timeout | |
379 | break; | |
380 | case AD_PARTNER_CHURN_TIMER: // for remote churn machine | |
381 | retval = (AD_CHURN_DETECTION_TIME*ad_ticks_per_sec); | |
382 | break; | |
383 | case AD_WAIT_WHILE_TIMER: // for selection machine | |
384 | retval = (AD_AGGREGATE_WAIT_TIME*ad_ticks_per_sec); | |
385 | break; | |
386 | } | |
387 | return retval; | |
388 | } | |
389 | ||
390 | ||
391 | ///////////////////////////////////////////////////////////////////////////////// | |
392 | // ================= ad_rx_machine helper functions ================== | |
393 | ///////////////////////////////////////////////////////////////////////////////// | |
394 | ||
2d6682db JV |
395 | /** |
396 | * __choose_matched - update a port's matched variable from a received lacpdu | |
397 | * @lacpdu: the lacpdu we've received | |
398 | * @port: the port we're looking at | |
399 | * | |
400 | * Update the value of the matched variable, using parameter values from a | |
401 | * newly received lacpdu. Parameter values for the partner carried in the | |
402 | * received PDU are compared with the corresponding operational parameter | |
403 | * values for the actor. Matched is set to TRUE if all of these parameters | |
404 | * match and the PDU parameter partner_state.aggregation has the same value as | |
405 | * actor_oper_port_state.aggregation and lacp will actively maintain the link | |
406 | * in the aggregation. Matched is also set to TRUE if the value of | |
407 | * actor_state.aggregation in the received PDU is set to FALSE, i.e., indicates | |
408 | * an individual link and lacp will actively maintain the link. Otherwise, | |
409 | * matched is set to FALSE. LACP is considered to be actively maintaining the | |
410 | * link if either the PDU's actor_state.lacp_activity variable is TRUE or both | |
411 | * the actor's actor_oper_port_state.lacp_activity and the PDU's | |
412 | * partner_state.lacp_activity variables are TRUE. | |
413 | * | |
414 | * Note: the AD_PORT_MATCHED "variable" is not specified by 802.3ad; it is | |
415 | * used here to implement the language from 802.3ad 43.4.9 that requires | |
416 | * recordPDU to "match" the LACPDU parameters to the stored values. | |
417 | */ | |
418 | static void __choose_matched(struct lacpdu *lacpdu, struct port *port) | |
419 | { | |
420 | // check if all parameters are alike | |
421 | if (((ntohs(lacpdu->partner_port) == port->actor_port_number) && | |
422 | (ntohs(lacpdu->partner_port_priority) == port->actor_port_priority) && | |
423 | !MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) && | |
424 | (ntohs(lacpdu->partner_system_priority) == port->actor_system_priority) && | |
425 | (ntohs(lacpdu->partner_key) == port->actor_oper_port_key) && | |
426 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) == (port->actor_oper_port_state & AD_STATE_AGGREGATION))) || | |
427 | // or this is individual link(aggregation == FALSE) | |
428 | ((lacpdu->actor_state & AD_STATE_AGGREGATION) == 0) | |
429 | ) { | |
430 | // update the state machine Matched variable | |
431 | port->sm_vars |= AD_PORT_MATCHED; | |
432 | } else { | |
433 | port->sm_vars &= ~AD_PORT_MATCHED; | |
434 | } | |
435 | } | |
436 | ||
1da177e4 LT |
437 | /** |
438 | * __record_pdu - record parameters from a received lacpdu | |
439 | * @lacpdu: the lacpdu we've received | |
440 | * @port: the port we're looking at | |
441 | * | |
442 | * Record the parameter values for the Actor carried in a received lacpdu as | |
443 | * the current partner operational parameter values and sets | |
444 | * actor_oper_port_state.defaulted to FALSE. | |
445 | */ | |
446 | static void __record_pdu(struct lacpdu *lacpdu, struct port *port) | |
447 | { | |
1da177e4 | 448 | if (lacpdu && port) { |
b99d6ba9 HE |
449 | struct port_params *partner = &port->partner_oper; |
450 | ||
2d6682db | 451 | __choose_matched(lacpdu, port); |
1da177e4 | 452 | // record the new parameter values for the partner operational |
b99d6ba9 HE |
453 | partner->port_number = ntohs(lacpdu->actor_port); |
454 | partner->port_priority = ntohs(lacpdu->actor_port_priority); | |
455 | partner->system = lacpdu->actor_system; | |
456 | partner->system_priority = ntohs(lacpdu->actor_system_priority); | |
457 | partner->key = ntohs(lacpdu->actor_key); | |
458 | partner->port_state = lacpdu->actor_state; | |
1da177e4 LT |
459 | |
460 | // set actor_oper_port_state.defaulted to FALSE | |
461 | port->actor_oper_port_state &= ~AD_STATE_DEFAULTED; | |
462 | ||
463 | // set the partner sync. to on if the partner is sync. and the port is matched | |
7bfc4753 BD |
464 | if ((port->sm_vars & AD_PORT_MATCHED) |
465 | && (lacpdu->actor_state & AD_STATE_SYNCHRONIZATION)) | |
b99d6ba9 | 466 | partner->port_state |= AD_STATE_SYNCHRONIZATION; |
7bfc4753 | 467 | else |
b99d6ba9 | 468 | partner->port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 LT |
469 | } |
470 | } | |
471 | ||
472 | /** | |
473 | * __record_default - record default parameters | |
474 | * @port: the port we're looking at | |
475 | * | |
476 | * This function records the default parameter values for the partner carried | |
477 | * in the Partner Admin parameters as the current partner operational parameter | |
478 | * values and sets actor_oper_port_state.defaulted to TRUE. | |
479 | */ | |
480 | static void __record_default(struct port *port) | |
481 | { | |
1da177e4 LT |
482 | if (port) { |
483 | // record the partner admin parameters | |
5eefd1ad HE |
484 | memcpy(&port->partner_oper, &port->partner_admin, |
485 | sizeof(struct port_params)); | |
1da177e4 LT |
486 | |
487 | // set actor_oper_port_state.defaulted to true | |
488 | port->actor_oper_port_state |= AD_STATE_DEFAULTED; | |
489 | } | |
490 | } | |
491 | ||
492 | /** | |
493 | * __update_selected - update a port's Selected variable from a received lacpdu | |
494 | * @lacpdu: the lacpdu we've received | |
495 | * @port: the port we're looking at | |
496 | * | |
497 | * Update the value of the selected variable, using parameter values from a | |
498 | * newly received lacpdu. The parameter values for the Actor carried in the | |
499 | * received PDU are compared with the corresponding operational parameter | |
500 | * values for the ports partner. If one or more of the comparisons shows that | |
501 | * the value(s) received in the PDU differ from the current operational values, | |
502 | * then selected is set to FALSE and actor_oper_port_state.synchronization is | |
503 | * set to out_of_sync. Otherwise, selected remains unchanged. | |
504 | */ | |
505 | static void __update_selected(struct lacpdu *lacpdu, struct port *port) | |
506 | { | |
1da177e4 | 507 | if (lacpdu && port) { |
ce6a49ad HE |
508 | const struct port_params *partner = &port->partner_oper; |
509 | ||
1da177e4 | 510 | // check if any parameter is different |
8e95a202 JP |
511 | if (ntohs(lacpdu->actor_port) != partner->port_number || |
512 | ntohs(lacpdu->actor_port_priority) != partner->port_priority || | |
513 | MAC_ADDRESS_COMPARE(&lacpdu->actor_system, &partner->system) || | |
514 | ntohs(lacpdu->actor_system_priority) != partner->system_priority || | |
515 | ntohs(lacpdu->actor_key) != partner->key || | |
516 | (lacpdu->actor_state & AD_STATE_AGGREGATION) != (partner->port_state & AD_STATE_AGGREGATION)) { | |
1da177e4 LT |
517 | // update the state machine Selected variable |
518 | port->sm_vars &= ~AD_PORT_SELECTED; | |
519 | } | |
520 | } | |
521 | } | |
522 | ||
523 | /** | |
524 | * __update_default_selected - update a port's Selected variable from Partner | |
525 | * @port: the port we're looking at | |
526 | * | |
527 | * This function updates the value of the selected variable, using the partner | |
528 | * administrative parameter values. The administrative values are compared with | |
529 | * the corresponding operational parameter values for the partner. If one or | |
530 | * more of the comparisons shows that the administrative value(s) differ from | |
531 | * the current operational values, then Selected is set to FALSE and | |
532 | * actor_oper_port_state.synchronization is set to OUT_OF_SYNC. Otherwise, | |
533 | * Selected remains unchanged. | |
534 | */ | |
535 | static void __update_default_selected(struct port *port) | |
536 | { | |
1da177e4 | 537 | if (port) { |
3c52065f HE |
538 | const struct port_params *admin = &port->partner_admin; |
539 | const struct port_params *oper = &port->partner_oper; | |
540 | ||
1da177e4 | 541 | // check if any parameter is different |
8e95a202 JP |
542 | if (admin->port_number != oper->port_number || |
543 | admin->port_priority != oper->port_priority || | |
544 | MAC_ADDRESS_COMPARE(&admin->system, &oper->system) || | |
545 | admin->system_priority != oper->system_priority || | |
546 | admin->key != oper->key || | |
547 | (admin->port_state & AD_STATE_AGGREGATION) | |
3c52065f | 548 | != (oper->port_state & AD_STATE_AGGREGATION)) { |
1da177e4 LT |
549 | // update the state machine Selected variable |
550 | port->sm_vars &= ~AD_PORT_SELECTED; | |
551 | } | |
552 | } | |
553 | } | |
554 | ||
1da177e4 LT |
555 | /** |
556 | * __update_ntt - update a port's ntt variable from a received lacpdu | |
557 | * @lacpdu: the lacpdu we've received | |
558 | * @port: the port we're looking at | |
559 | * | |
560 | * Updates the value of the ntt variable, using parameter values from a newly | |
561 | * received lacpdu. The parameter values for the partner carried in the | |
562 | * received PDU are compared with the corresponding operational parameter | |
563 | * values for the Actor. If one or more of the comparisons shows that the | |
564 | * value(s) received in the PDU differ from the current operational values, | |
565 | * then ntt is set to TRUE. Otherwise, ntt remains unchanged. | |
566 | */ | |
567 | static void __update_ntt(struct lacpdu *lacpdu, struct port *port) | |
568 | { | |
569 | // validate lacpdu and port | |
570 | if (lacpdu && port) { | |
571 | // check if any parameter is different | |
89cc76f9 JV |
572 | if ((ntohs(lacpdu->partner_port) != port->actor_port_number) || |
573 | (ntohs(lacpdu->partner_port_priority) != port->actor_port_priority) || | |
1da177e4 | 574 | MAC_ADDRESS_COMPARE(&(lacpdu->partner_system), &(port->actor_system)) || |
89cc76f9 JV |
575 | (ntohs(lacpdu->partner_system_priority) != port->actor_system_priority) || |
576 | (ntohs(lacpdu->partner_key) != port->actor_oper_port_key) || | |
1da177e4 LT |
577 | ((lacpdu->partner_state & AD_STATE_LACP_ACTIVITY) != (port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY)) || |
578 | ((lacpdu->partner_state & AD_STATE_LACP_TIMEOUT) != (port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)) || | |
579 | ((lacpdu->partner_state & AD_STATE_SYNCHRONIZATION) != (port->actor_oper_port_state & AD_STATE_SYNCHRONIZATION)) || | |
580 | ((lacpdu->partner_state & AD_STATE_AGGREGATION) != (port->actor_oper_port_state & AD_STATE_AGGREGATION)) | |
581 | ) { | |
d238d458 HE |
582 | |
583 | port->ntt = true; | |
1da177e4 LT |
584 | } |
585 | } | |
586 | } | |
587 | ||
588 | /** | |
589 | * __attach_bond_to_agg | |
590 | * @port: the port we're looking at | |
591 | * | |
592 | * Handle the attaching of the port's control parser/multiplexer and the | |
593 | * aggregator. This function does nothing since the parser/multiplexer of the | |
594 | * receive and the parser/multiplexer of the aggregator are already combined. | |
595 | */ | |
596 | static void __attach_bond_to_agg(struct port *port) | |
597 | { | |
128ea6c3 | 598 | port = NULL; /* just to satisfy the compiler */ |
1da177e4 LT |
599 | // This function does nothing since the parser/multiplexer of the receive |
600 | // and the parser/multiplexer of the aggregator are already combined | |
601 | } | |
602 | ||
603 | /** | |
604 | * __detach_bond_from_agg | |
605 | * @port: the port we're looking at | |
606 | * | |
607 | * Handle the detaching of the port's control parser/multiplexer from the | |
608 | * aggregator. This function does nothing since the parser/multiplexer of the | |
609 | * receive and the parser/multiplexer of the aggregator are already combined. | |
610 | */ | |
611 | static void __detach_bond_from_agg(struct port *port) | |
612 | { | |
128ea6c3 | 613 | port = NULL; /* just to satisfy the compiler */ |
b9d6d2db | 614 | // This function does nothing since the parser/multiplexer of the receive |
1da177e4 LT |
615 | // and the parser/multiplexer of the aggregator are already combined |
616 | } | |
617 | ||
618 | /** | |
619 | * __agg_ports_are_ready - check if all ports in an aggregator are ready | |
620 | * @aggregator: the aggregator we're looking at | |
621 | * | |
622 | */ | |
623 | static int __agg_ports_are_ready(struct aggregator *aggregator) | |
624 | { | |
625 | struct port *port; | |
626 | int retval = 1; | |
627 | ||
628 | if (aggregator) { | |
629 | // scan all ports in this aggregator to verfy if they are all ready | |
128ea6c3 BD |
630 | for (port = aggregator->lag_ports; |
631 | port; | |
632 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
633 | if (!(port->sm_vars & AD_PORT_READY_N)) { |
634 | retval = 0; | |
635 | break; | |
636 | } | |
637 | } | |
638 | } | |
639 | ||
640 | return retval; | |
641 | } | |
642 | ||
643 | /** | |
644 | * __set_agg_ports_ready - set value of Ready bit in all ports of an aggregator | |
645 | * @aggregator: the aggregator we're looking at | |
646 | * @val: Should the ports' ready bit be set on or off | |
647 | * | |
648 | */ | |
649 | static void __set_agg_ports_ready(struct aggregator *aggregator, int val) | |
650 | { | |
651 | struct port *port; | |
652 | ||
128ea6c3 BD |
653 | for (port = aggregator->lag_ports; port; |
654 | port = port->next_port_in_aggregator) { | |
7bfc4753 | 655 | if (val) |
1da177e4 | 656 | port->sm_vars |= AD_PORT_READY; |
7bfc4753 | 657 | else |
1da177e4 | 658 | port->sm_vars &= ~AD_PORT_READY; |
1da177e4 LT |
659 | } |
660 | } | |
661 | ||
662 | /** | |
663 | * __get_agg_bandwidth - get the total bandwidth of an aggregator | |
664 | * @aggregator: the aggregator we're looking at | |
665 | * | |
666 | */ | |
667 | static u32 __get_agg_bandwidth(struct aggregator *aggregator) | |
668 | { | |
128ea6c3 | 669 | u32 bandwidth = 0; |
1da177e4 LT |
670 | |
671 | if (aggregator->num_of_ports) { | |
65cce19c | 672 | switch (__get_link_speed(aggregator->lag_ports)) { |
1da177e4 LT |
673 | case AD_LINK_SPEED_BITMASK_1MBPS: |
674 | bandwidth = aggregator->num_of_ports; | |
675 | break; | |
676 | case AD_LINK_SPEED_BITMASK_10MBPS: | |
677 | bandwidth = aggregator->num_of_ports * 10; | |
678 | break; | |
679 | case AD_LINK_SPEED_BITMASK_100MBPS: | |
680 | bandwidth = aggregator->num_of_ports * 100; | |
681 | break; | |
682 | case AD_LINK_SPEED_BITMASK_1000MBPS: | |
683 | bandwidth = aggregator->num_of_ports * 1000; | |
684 | break; | |
94dbffd5 JV |
685 | case AD_LINK_SPEED_BITMASK_10000MBPS: |
686 | bandwidth = aggregator->num_of_ports * 10000; | |
687 | break; | |
1da177e4 | 688 | default: |
128ea6c3 | 689 | bandwidth = 0; /*to silence the compiler ....*/ |
1da177e4 LT |
690 | } |
691 | } | |
692 | return bandwidth; | |
693 | } | |
694 | ||
695 | /** | |
696 | * __get_active_agg - get the current active aggregator | |
697 | * @aggregator: the aggregator we're looking at | |
698 | * | |
699 | */ | |
700 | static struct aggregator *__get_active_agg(struct aggregator *aggregator) | |
701 | { | |
19177e7d VF |
702 | struct bonding *bond = aggregator->slave->bond; |
703 | struct list_head *iter; | |
704 | struct slave *slave; | |
1da177e4 | 705 | |
be79bd04 | 706 | rcu_read_lock(); |
707 | bond_for_each_slave_rcu(bond, slave, iter) | |
708 | if (SLAVE_AD_INFO(slave).aggregator.is_active) { | |
709 | rcu_read_unlock(); | |
19177e7d | 710 | return &(SLAVE_AD_INFO(slave).aggregator); |
be79bd04 | 711 | } |
712 | rcu_read_unlock(); | |
1da177e4 | 713 | |
19177e7d | 714 | return NULL; |
1da177e4 LT |
715 | } |
716 | ||
717 | /** | |
718 | * __update_lacpdu_from_port - update a port's lacpdu fields | |
719 | * @port: the port we're looking at | |
720 | * | |
721 | */ | |
722 | static inline void __update_lacpdu_from_port(struct port *port) | |
723 | { | |
724 | struct lacpdu *lacpdu = &port->lacpdu; | |
3b5b35d0 | 725 | const struct port_params *partner = &port->partner_oper; |
1da177e4 LT |
726 | |
727 | /* update current actual Actor parameters */ | |
728 | /* lacpdu->subtype initialized | |
729 | * lacpdu->version_number initialized | |
730 | * lacpdu->tlv_type_actor_info initialized | |
731 | * lacpdu->actor_information_length initialized | |
732 | */ | |
733 | ||
d3bb52b0 | 734 | lacpdu->actor_system_priority = htons(port->actor_system_priority); |
1da177e4 | 735 | lacpdu->actor_system = port->actor_system; |
d3bb52b0 AV |
736 | lacpdu->actor_key = htons(port->actor_oper_port_key); |
737 | lacpdu->actor_port_priority = htons(port->actor_port_priority); | |
738 | lacpdu->actor_port = htons(port->actor_port_number); | |
1da177e4 LT |
739 | lacpdu->actor_state = port->actor_oper_port_state; |
740 | ||
741 | /* lacpdu->reserved_3_1 initialized | |
742 | * lacpdu->tlv_type_partner_info initialized | |
743 | * lacpdu->partner_information_length initialized | |
744 | */ | |
745 | ||
3b5b35d0 HE |
746 | lacpdu->partner_system_priority = htons(partner->system_priority); |
747 | lacpdu->partner_system = partner->system; | |
748 | lacpdu->partner_key = htons(partner->key); | |
749 | lacpdu->partner_port_priority = htons(partner->port_priority); | |
750 | lacpdu->partner_port = htons(partner->port_number); | |
751 | lacpdu->partner_state = partner->port_state; | |
1da177e4 LT |
752 | |
753 | /* lacpdu->reserved_3_2 initialized | |
754 | * lacpdu->tlv_type_collector_info initialized | |
755 | * lacpdu->collector_information_length initialized | |
756 | * collector_max_delay initialized | |
757 | * reserved_12[12] initialized | |
758 | * tlv_type_terminator initialized | |
759 | * terminator_length initialized | |
760 | * reserved_50[50] initialized | |
761 | */ | |
1da177e4 LT |
762 | } |
763 | ||
764 | ////////////////////////////////////////////////////////////////////////////////////// | |
765 | // ================= main 802.3ad protocol code ====================================== | |
766 | ////////////////////////////////////////////////////////////////////////////////////// | |
767 | ||
768 | /** | |
769 | * ad_lacpdu_send - send out a lacpdu packet on a given port | |
770 | * @port: the port we're looking at | |
771 | * | |
772 | * Returns: 0 on success | |
773 | * < 0 on error | |
774 | */ | |
775 | static int ad_lacpdu_send(struct port *port) | |
776 | { | |
777 | struct slave *slave = port->slave; | |
778 | struct sk_buff *skb; | |
779 | struct lacpdu_header *lacpdu_header; | |
780 | int length = sizeof(struct lacpdu_header); | |
1da177e4 LT |
781 | |
782 | skb = dev_alloc_skb(length); | |
7bfc4753 | 783 | if (!skb) |
1da177e4 | 784 | return -ENOMEM; |
1da177e4 LT |
785 | |
786 | skb->dev = slave->dev; | |
459a98ed | 787 | skb_reset_mac_header(skb); |
b0e380b1 | 788 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
789 | skb->protocol = PKT_TYPE_LACPDU; |
790 | skb->priority = TC_PRIO_CONTROL; | |
791 | ||
792 | lacpdu_header = (struct lacpdu_header *)skb_put(skb, length); | |
793 | ||
e727149e | 794 | memcpy(lacpdu_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 795 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 796 | because we use it to identify loopback lacpdus in receive. */ |
e727149e HE |
797 | memcpy(lacpdu_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
798 | lacpdu_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
799 | |
800 | lacpdu_header->lacpdu = port->lacpdu; // struct copy | |
801 | ||
802 | dev_queue_xmit(skb); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
807 | /** | |
808 | * ad_marker_send - send marker information/response on a given port | |
809 | * @port: the port we're looking at | |
810 | * @marker: marker data to send | |
811 | * | |
812 | * Returns: 0 on success | |
813 | * < 0 on error | |
814 | */ | |
1c3f0b8e | 815 | static int ad_marker_send(struct port *port, struct bond_marker *marker) |
1da177e4 LT |
816 | { |
817 | struct slave *slave = port->slave; | |
818 | struct sk_buff *skb; | |
1c3f0b8e MD |
819 | struct bond_marker_header *marker_header; |
820 | int length = sizeof(struct bond_marker_header); | |
1da177e4 LT |
821 | |
822 | skb = dev_alloc_skb(length + 16); | |
7bfc4753 | 823 | if (!skb) |
1da177e4 | 824 | return -ENOMEM; |
1da177e4 LT |
825 | |
826 | skb_reserve(skb, 16); | |
827 | ||
828 | skb->dev = slave->dev; | |
459a98ed | 829 | skb_reset_mac_header(skb); |
b0e380b1 | 830 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
831 | skb->protocol = PKT_TYPE_LACPDU; |
832 | ||
1c3f0b8e | 833 | marker_header = (struct bond_marker_header *)skb_put(skb, length); |
1da177e4 | 834 | |
e727149e | 835 | memcpy(marker_header->hdr.h_dest, lacpdu_mcast_addr, ETH_ALEN); |
b595076a | 836 | /* Note: source address is set to be the member's PERMANENT address, |
e4ac4320 | 837 | because we use it to identify loopback MARKERs in receive. */ |
e727149e HE |
838 | memcpy(marker_header->hdr.h_source, slave->perm_hwaddr, ETH_ALEN); |
839 | marker_header->hdr.h_proto = PKT_TYPE_LACPDU; | |
1da177e4 LT |
840 | |
841 | marker_header->marker = *marker; // struct copy | |
842 | ||
843 | dev_queue_xmit(skb); | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
848 | /** | |
849 | * ad_mux_machine - handle a port's mux state machine | |
850 | * @port: the port we're looking at | |
851 | * | |
852 | */ | |
853 | static void ad_mux_machine(struct port *port) | |
854 | { | |
855 | mux_states_t last_state; | |
856 | ||
857 | // keep current State Machine state to compare later if it was changed | |
858 | last_state = port->sm_mux_state; | |
859 | ||
860 | if (port->sm_vars & AD_PORT_BEGIN) { | |
861 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
862 | } else { | |
863 | switch (port->sm_mux_state) { | |
864 | case AD_MUX_DETACHED: | |
7bfc4753 BD |
865 | if ((port->sm_vars & AD_PORT_SELECTED) |
866 | || (port->sm_vars & AD_PORT_STANDBY)) | |
867 | /* if SELECTED or STANDBY */ | |
1da177e4 | 868 | port->sm_mux_state = AD_MUX_WAITING; // next state |
1da177e4 LT |
869 | break; |
870 | case AD_MUX_WAITING: | |
871 | // if SELECTED == FALSE return to DETACH state | |
872 | if (!(port->sm_vars & AD_PORT_SELECTED)) { // if UNSELECTED | |
873 | port->sm_vars &= ~AD_PORT_READY_N; | |
874 | // in order to withhold the Selection Logic to check all ports READY_N value | |
875 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
876 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
877 | port->sm_mux_state = AD_MUX_DETACHED; // next state | |
878 | break; | |
879 | } | |
880 | ||
881 | // check if the wait_while_timer expired | |
7bfc4753 BD |
882 | if (port->sm_mux_timer_counter |
883 | && !(--port->sm_mux_timer_counter)) | |
1da177e4 | 884 | port->sm_vars |= AD_PORT_READY_N; |
1da177e4 LT |
885 | |
886 | // in order to withhold the selection logic to check all ports READY_N value | |
887 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
888 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
889 | ||
890 | // if the wait_while_timer expired, and the port is in READY state, move to ATTACHED state | |
7bfc4753 BD |
891 | if ((port->sm_vars & AD_PORT_READY) |
892 | && !port->sm_mux_timer_counter) | |
1da177e4 | 893 | port->sm_mux_state = AD_MUX_ATTACHED; // next state |
1da177e4 LT |
894 | break; |
895 | case AD_MUX_ATTACHED: | |
896 | // check also if agg_select_timer expired(so the edable port will take place only after this timer) | |
1055c9ab | 897 | if ((port->sm_vars & AD_PORT_SELECTED) && (port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) && !__check_agg_selection_timer(port)) { |
1da177e4 LT |
898 | port->sm_mux_state = AD_MUX_COLLECTING_DISTRIBUTING;// next state |
899 | } else if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY)) { // if UNSELECTED or STANDBY | |
900 | port->sm_vars &= ~AD_PORT_READY_N; | |
901 | // in order to withhold the selection logic to check all ports READY_N value | |
902 | // every callback cycle to update ready variable, we check READY_N and update READY here | |
903 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
904 | port->sm_mux_state = AD_MUX_DETACHED;// next state | |
905 | } | |
906 | break; | |
907 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
908 | if (!(port->sm_vars & AD_PORT_SELECTED) || (port->sm_vars & AD_PORT_STANDBY) || | |
1055c9ab | 909 | !(port->partner_oper.port_state & AD_STATE_SYNCHRONIZATION) |
1da177e4 LT |
910 | ) { |
911 | port->sm_mux_state = AD_MUX_ATTACHED;// next state | |
912 | ||
913 | } else { | |
914 | // if port state hasn't changed make | |
915 | // sure that a collecting distributing | |
916 | // port in an active aggregator is enabled | |
917 | if (port->aggregator && | |
918 | port->aggregator->is_active && | |
919 | !__port_is_enabled(port)) { | |
920 | ||
921 | __enable_port(port); | |
922 | } | |
923 | } | |
924 | break; | |
925 | default: //to silence the compiler | |
926 | break; | |
927 | } | |
928 | } | |
929 | ||
930 | // check if the state machine was changed | |
931 | if (port->sm_mux_state != last_state) { | |
a4aee5c8 JP |
932 | pr_debug("Mux Machine: Port=%d, Last State=%d, Curr State=%d\n", |
933 | port->actor_port_number, last_state, | |
934 | port->sm_mux_state); | |
1da177e4 LT |
935 | switch (port->sm_mux_state) { |
936 | case AD_MUX_DETACHED: | |
937 | __detach_bond_from_agg(port); | |
938 | port->actor_oper_port_state &= ~AD_STATE_SYNCHRONIZATION; | |
939 | ad_disable_collecting_distributing(port); | |
940 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
941 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
d238d458 | 942 | port->ntt = true; |
1da177e4 LT |
943 | break; |
944 | case AD_MUX_WAITING: | |
945 | port->sm_mux_timer_counter = __ad_timer_to_ticks(AD_WAIT_WHILE_TIMER, 0); | |
946 | break; | |
947 | case AD_MUX_ATTACHED: | |
948 | __attach_bond_to_agg(port); | |
949 | port->actor_oper_port_state |= AD_STATE_SYNCHRONIZATION; | |
950 | port->actor_oper_port_state &= ~AD_STATE_COLLECTING; | |
951 | port->actor_oper_port_state &= ~AD_STATE_DISTRIBUTING; | |
952 | ad_disable_collecting_distributing(port); | |
d238d458 | 953 | port->ntt = true; |
1da177e4 LT |
954 | break; |
955 | case AD_MUX_COLLECTING_DISTRIBUTING: | |
956 | port->actor_oper_port_state |= AD_STATE_COLLECTING; | |
957 | port->actor_oper_port_state |= AD_STATE_DISTRIBUTING; | |
958 | ad_enable_collecting_distributing(port); | |
d238d458 | 959 | port->ntt = true; |
1da177e4 LT |
960 | break; |
961 | default: //to silence the compiler | |
962 | break; | |
963 | } | |
964 | } | |
965 | } | |
966 | ||
967 | /** | |
968 | * ad_rx_machine - handle a port's rx State Machine | |
969 | * @lacpdu: the lacpdu we've received | |
970 | * @port: the port we're looking at | |
971 | * | |
972 | * If lacpdu arrived, stop previous timer (if exists) and set the next state as | |
973 | * CURRENT. If timer expired set the state machine in the proper state. | |
974 | * In other cases, this function checks if we need to switch to other state. | |
975 | */ | |
976 | static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port) | |
977 | { | |
978 | rx_states_t last_state; | |
979 | ||
1da177e4 LT |
980 | // keep current State Machine state to compare later if it was changed |
981 | last_state = port->sm_rx_state; | |
982 | ||
983 | // check if state machine should change state | |
984 | // first, check if port was reinitialized | |
7bfc4753 BD |
985 | if (port->sm_vars & AD_PORT_BEGIN) |
986 | /* next state */ | |
987 | port->sm_rx_state = AD_RX_INITIALIZE; | |
1da177e4 | 988 | // check if port is not enabled |
7bfc4753 BD |
989 | else if (!(port->sm_vars & AD_PORT_BEGIN) |
990 | && !port->is_enabled && !(port->sm_vars & AD_PORT_MOVED)) | |
991 | /* next state */ | |
992 | port->sm_rx_state = AD_RX_PORT_DISABLED; | |
1da177e4 LT |
993 | // check if new lacpdu arrived |
994 | else if (lacpdu && ((port->sm_rx_state == AD_RX_EXPIRED) || (port->sm_rx_state == AD_RX_DEFAULTED) || (port->sm_rx_state == AD_RX_CURRENT))) { | |
995 | port->sm_rx_timer_counter = 0; // zero timer | |
996 | port->sm_rx_state = AD_RX_CURRENT; | |
997 | } else { | |
998 | // if timer is on, and if it is expired | |
999 | if (port->sm_rx_timer_counter && !(--port->sm_rx_timer_counter)) { | |
1000 | switch (port->sm_rx_state) { | |
1001 | case AD_RX_EXPIRED: | |
1002 | port->sm_rx_state = AD_RX_DEFAULTED; // next state | |
1003 | break; | |
1004 | case AD_RX_CURRENT: | |
1005 | port->sm_rx_state = AD_RX_EXPIRED; // next state | |
1006 | break; | |
1007 | default: //to silence the compiler | |
1008 | break; | |
1009 | } | |
1010 | } else { | |
1011 | // if no lacpdu arrived and no timer is on | |
1012 | switch (port->sm_rx_state) { | |
1013 | case AD_RX_PORT_DISABLED: | |
7bfc4753 | 1014 | if (port->sm_vars & AD_PORT_MOVED) |
1da177e4 | 1015 | port->sm_rx_state = AD_RX_INITIALIZE; // next state |
7bfc4753 BD |
1016 | else if (port->is_enabled |
1017 | && (port->sm_vars | |
1018 | & AD_PORT_LACP_ENABLED)) | |
1da177e4 | 1019 | port->sm_rx_state = AD_RX_EXPIRED; // next state |
7bfc4753 BD |
1020 | else if (port->is_enabled |
1021 | && ((port->sm_vars | |
1022 | & AD_PORT_LACP_ENABLED) == 0)) | |
1da177e4 | 1023 | port->sm_rx_state = AD_RX_LACP_DISABLED; // next state |
1da177e4 LT |
1024 | break; |
1025 | default: //to silence the compiler | |
1026 | break; | |
1027 | ||
1028 | } | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | // check if the State machine was changed or new lacpdu arrived | |
1033 | if ((port->sm_rx_state != last_state) || (lacpdu)) { | |
a4aee5c8 JP |
1034 | pr_debug("Rx Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1035 | port->actor_port_number, last_state, | |
1036 | port->sm_rx_state); | |
1da177e4 LT |
1037 | switch (port->sm_rx_state) { |
1038 | case AD_RX_INITIALIZE: | |
7bfc4753 | 1039 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1040 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
7bfc4753 | 1041 | else |
1da177e4 | 1042 | port->sm_vars |= AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1043 | port->sm_vars &= ~AD_PORT_SELECTED; |
1044 | __record_default(port); | |
1045 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1046 | port->sm_vars &= ~AD_PORT_MOVED; | |
1047 | port->sm_rx_state = AD_RX_PORT_DISABLED; // next state | |
1048 | ||
1049 | /*- Fall Through -*/ | |
1050 | ||
1051 | case AD_RX_PORT_DISABLED: | |
1052 | port->sm_vars &= ~AD_PORT_MATCHED; | |
1053 | break; | |
1054 | case AD_RX_LACP_DISABLED: | |
1055 | port->sm_vars &= ~AD_PORT_SELECTED; | |
1056 | __record_default(port); | |
1055c9ab | 1057 | port->partner_oper.port_state &= ~AD_STATE_AGGREGATION; |
1da177e4 LT |
1058 | port->sm_vars |= AD_PORT_MATCHED; |
1059 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1060 | break; | |
1061 | case AD_RX_EXPIRED: | |
1062 | //Reset of the Synchronization flag. (Standard 43.4.12) | |
1063 | //This reset cause to disable this port in the COLLECTING_DISTRIBUTING state of the | |
1064 | //mux machine in case of EXPIRED even if LINK_DOWN didn't arrive for the port. | |
1055c9ab | 1065 | port->partner_oper.port_state &= ~AD_STATE_SYNCHRONIZATION; |
1da177e4 | 1066 | port->sm_vars &= ~AD_PORT_MATCHED; |
8e321c4f JL |
1067 | port->partner_oper.port_state |= |
1068 | AD_STATE_LACP_ACTIVITY; | |
1da177e4 LT |
1069 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(AD_SHORT_TIMEOUT)); |
1070 | port->actor_oper_port_state |= AD_STATE_EXPIRED; | |
1071 | break; | |
1072 | case AD_RX_DEFAULTED: | |
1073 | __update_default_selected(port); | |
1074 | __record_default(port); | |
1075 | port->sm_vars |= AD_PORT_MATCHED; | |
1076 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1077 | break; | |
1078 | case AD_RX_CURRENT: | |
1079 | // detect loopback situation | |
1080 | if (!MAC_ADDRESS_COMPARE(&(lacpdu->actor_system), &(port->actor_system))) { | |
1081 | // INFO_RECEIVED_LOOPBACK_FRAMES | |
a4aee5c8 JP |
1082 | pr_err("%s: An illegal loopback occurred on adapter (%s).\n" |
1083 | "Check the configuration to verify that all adapters are connected to 802.3ad compliant switch ports\n", | |
471cb5a3 | 1084 | port->slave->bond->dev->name, port->slave->dev->name); |
1da177e4 LT |
1085 | return; |
1086 | } | |
1087 | __update_selected(lacpdu, port); | |
1088 | __update_ntt(lacpdu, port); | |
1089 | __record_pdu(lacpdu, port); | |
1da177e4 LT |
1090 | port->sm_rx_timer_counter = __ad_timer_to_ticks(AD_CURRENT_WHILE_TIMER, (u16)(port->actor_oper_port_state & AD_STATE_LACP_TIMEOUT)); |
1091 | port->actor_oper_port_state &= ~AD_STATE_EXPIRED; | |
1da177e4 LT |
1092 | break; |
1093 | default: //to silence the compiler | |
1094 | break; | |
1095 | } | |
1096 | } | |
1da177e4 LT |
1097 | } |
1098 | ||
1099 | /** | |
1100 | * ad_tx_machine - handle a port's tx state machine | |
1101 | * @port: the port we're looking at | |
1102 | * | |
1103 | */ | |
1104 | static void ad_tx_machine(struct port *port) | |
1105 | { | |
1106 | // check if tx timer expired, to verify that we do not send more than 3 packets per second | |
1107 | if (port->sm_tx_timer_counter && !(--port->sm_tx_timer_counter)) { | |
1108 | // check if there is something to send | |
1109 | if (port->ntt && (port->sm_vars & AD_PORT_LACP_ENABLED)) { | |
1110 | __update_lacpdu_from_port(port); | |
d238d458 | 1111 | |
1da177e4 | 1112 | if (ad_lacpdu_send(port) >= 0) { |
a4aee5c8 JP |
1113 | pr_debug("Sent LACPDU on port %d\n", |
1114 | port->actor_port_number); | |
d238d458 HE |
1115 | |
1116 | /* mark ntt as false, so it will not be sent again until | |
1117 | demanded */ | |
1118 | port->ntt = false; | |
1da177e4 LT |
1119 | } |
1120 | } | |
1121 | // restart tx timer(to verify that we will not exceed AD_MAX_TX_IN_SECOND | |
128ea6c3 BD |
1122 | port->sm_tx_timer_counter = |
1123 | ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1da177e4 LT |
1124 | } |
1125 | } | |
1126 | ||
1127 | /** | |
1128 | * ad_periodic_machine - handle a port's periodic state machine | |
1129 | * @port: the port we're looking at | |
1130 | * | |
1131 | * Turn ntt flag on priodically to perform periodic transmission of lacpdu's. | |
1132 | */ | |
1133 | static void ad_periodic_machine(struct port *port) | |
1134 | { | |
1135 | periodic_states_t last_state; | |
1136 | ||
1137 | // keep current state machine state to compare later if it was changed | |
1138 | last_state = port->sm_periodic_state; | |
1139 | ||
1140 | // check if port was reinitialized | |
1141 | if (((port->sm_vars & AD_PORT_BEGIN) || !(port->sm_vars & AD_PORT_LACP_ENABLED) || !port->is_enabled) || | |
1055c9ab | 1142 | (!(port->actor_oper_port_state & AD_STATE_LACP_ACTIVITY) && !(port->partner_oper.port_state & AD_STATE_LACP_ACTIVITY)) |
1da177e4 LT |
1143 | ) { |
1144 | port->sm_periodic_state = AD_NO_PERIODIC; // next state | |
1145 | } | |
1146 | // check if state machine should change state | |
1147 | else if (port->sm_periodic_timer_counter) { | |
1148 | // check if periodic state machine expired | |
1149 | if (!(--port->sm_periodic_timer_counter)) { | |
1150 | // if expired then do tx | |
1151 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1152 | } else { | |
1153 | // If not expired, check if there is some new timeout parameter from the partner state | |
1154 | switch (port->sm_periodic_state) { | |
1155 | case AD_FAST_PERIODIC: | |
7bfc4753 BD |
1156 | if (!(port->partner_oper.port_state |
1157 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1158 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
1da177e4 LT |
1159 | break; |
1160 | case AD_SLOW_PERIODIC: | |
1055c9ab | 1161 | if ((port->partner_oper.port_state & AD_STATE_LACP_TIMEOUT)) { |
1da177e4 LT |
1162 | // stop current timer |
1163 | port->sm_periodic_timer_counter = 0; | |
1164 | port->sm_periodic_state = AD_PERIODIC_TX; // next state | |
1165 | } | |
1166 | break; | |
1167 | default: //to silence the compiler | |
1168 | break; | |
1169 | } | |
1170 | } | |
1171 | } else { | |
1172 | switch (port->sm_periodic_state) { | |
1173 | case AD_NO_PERIODIC: | |
1174 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state | |
1175 | break; | |
1176 | case AD_PERIODIC_TX: | |
7bfc4753 BD |
1177 | if (!(port->partner_oper.port_state |
1178 | & AD_STATE_LACP_TIMEOUT)) | |
1da177e4 | 1179 | port->sm_periodic_state = AD_SLOW_PERIODIC; // next state |
7bfc4753 | 1180 | else |
1da177e4 | 1181 | port->sm_periodic_state = AD_FAST_PERIODIC; // next state |
1da177e4 LT |
1182 | break; |
1183 | default: //to silence the compiler | |
1184 | break; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | // check if the state machine was changed | |
1189 | if (port->sm_periodic_state != last_state) { | |
a4aee5c8 JP |
1190 | pr_debug("Periodic Machine: Port=%d, Last State=%d, Curr State=%d\n", |
1191 | port->actor_port_number, last_state, | |
1192 | port->sm_periodic_state); | |
1da177e4 LT |
1193 | switch (port->sm_periodic_state) { |
1194 | case AD_NO_PERIODIC: | |
1195 | port->sm_periodic_timer_counter = 0; // zero timer | |
1196 | break; | |
1197 | case AD_FAST_PERIODIC: | |
1198 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_FAST_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1199 | break; | |
1200 | case AD_SLOW_PERIODIC: | |
1201 | port->sm_periodic_timer_counter = __ad_timer_to_ticks(AD_PERIODIC_TIMER, (u16)(AD_SLOW_PERIODIC_TIME))-1; // decrement 1 tick we lost in the PERIODIC_TX cycle | |
1202 | break; | |
1203 | case AD_PERIODIC_TX: | |
d238d458 | 1204 | port->ntt = true; |
1da177e4 LT |
1205 | break; |
1206 | default: //to silence the compiler | |
1207 | break; | |
1208 | } | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /** | |
1213 | * ad_port_selection_logic - select aggregation groups | |
1214 | * @port: the port we're looking at | |
1215 | * | |
1216 | * Select aggregation groups, and assign each port for it's aggregetor. The | |
1217 | * selection logic is called in the inititalization (after all the handshkes), | |
1218 | * and after every lacpdu receive (if selected is off). | |
1219 | */ | |
1220 | static void ad_port_selection_logic(struct port *port) | |
1221 | { | |
1222 | struct aggregator *aggregator, *free_aggregator = NULL, *temp_aggregator; | |
1223 | struct port *last_port = NULL, *curr_port; | |
3e36bb75 VF |
1224 | struct list_head *iter; |
1225 | struct bonding *bond; | |
1226 | struct slave *slave; | |
1da177e4 LT |
1227 | int found = 0; |
1228 | ||
1229 | // if the port is already Selected, do nothing | |
7bfc4753 | 1230 | if (port->sm_vars & AD_PORT_SELECTED) |
1da177e4 | 1231 | return; |
1da177e4 | 1232 | |
3e36bb75 VF |
1233 | bond = __get_bond_by_port(port); |
1234 | ||
1da177e4 LT |
1235 | // if the port is connected to other aggregator, detach it |
1236 | if (port->aggregator) { | |
1237 | // detach the port from its former aggregator | |
128ea6c3 BD |
1238 | temp_aggregator = port->aggregator; |
1239 | for (curr_port = temp_aggregator->lag_ports; curr_port; | |
1240 | last_port = curr_port, | |
1241 | curr_port = curr_port->next_port_in_aggregator) { | |
1da177e4 LT |
1242 | if (curr_port == port) { |
1243 | temp_aggregator->num_of_ports--; | |
1244 | if (!last_port) {// if it is the first port attached to the aggregator | |
128ea6c3 BD |
1245 | temp_aggregator->lag_ports = |
1246 | port->next_port_in_aggregator; | |
1da177e4 | 1247 | } else {// not the first port attached to the aggregator |
128ea6c3 BD |
1248 | last_port->next_port_in_aggregator = |
1249 | port->next_port_in_aggregator; | |
1da177e4 LT |
1250 | } |
1251 | ||
1252 | // clear the port's relations to this aggregator | |
1253 | port->aggregator = NULL; | |
128ea6c3 BD |
1254 | port->next_port_in_aggregator = NULL; |
1255 | port->actor_port_aggregator_identifier = 0; | |
1da177e4 | 1256 | |
a4aee5c8 JP |
1257 | pr_debug("Port %d left LAG %d\n", |
1258 | port->actor_port_number, | |
1259 | temp_aggregator->aggregator_identifier); | |
1da177e4 | 1260 | // if the aggregator is empty, clear its parameters, and set it ready to be attached |
7bfc4753 | 1261 | if (!temp_aggregator->lag_ports) |
1da177e4 | 1262 | ad_clear_agg(temp_aggregator); |
1da177e4 LT |
1263 | break; |
1264 | } | |
1265 | } | |
1266 | if (!curr_port) { // meaning: the port was related to an aggregator but was not on the aggregator port list | |
a4aee5c8 | 1267 | pr_warning("%s: Warning: Port %d (on %s) was related to aggregator %d but was not on its port list\n", |
471cb5a3 | 1268 | port->slave->bond->dev->name, |
e5e2a8fd JP |
1269 | port->actor_port_number, |
1270 | port->slave->dev->name, | |
1271 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1272 | } |
1273 | } | |
1274 | // search on all aggregators for a suitable aggregator for this port | |
3e36bb75 VF |
1275 | bond_for_each_slave(bond, slave, iter) { |
1276 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1da177e4 LT |
1277 | |
1278 | // keep a free aggregator for later use(if needed) | |
1279 | if (!aggregator->lag_ports) { | |
7bfc4753 | 1280 | if (!free_aggregator) |
128ea6c3 | 1281 | free_aggregator = aggregator; |
1da177e4 LT |
1282 | continue; |
1283 | } | |
1284 | // check if current aggregator suits us | |
1285 | if (((aggregator->actor_oper_aggregator_key == port->actor_oper_port_key) && // if all parameters match AND | |
1055c9ab HE |
1286 | !MAC_ADDRESS_COMPARE(&(aggregator->partner_system), &(port->partner_oper.system)) && |
1287 | (aggregator->partner_system_priority == port->partner_oper.system_priority) && | |
1288 | (aggregator->partner_oper_aggregator_key == port->partner_oper.key) | |
1da177e4 | 1289 | ) && |
1055c9ab | 1290 | ((MAC_ADDRESS_COMPARE(&(port->partner_oper.system), &(null_mac_addr)) && // partner answers |
1da177e4 LT |
1291 | !aggregator->is_individual) // but is not individual OR |
1292 | ) | |
1293 | ) { | |
1294 | // attach to the founded aggregator | |
1295 | port->aggregator = aggregator; | |
128ea6c3 BD |
1296 | port->actor_port_aggregator_identifier = |
1297 | port->aggregator->aggregator_identifier; | |
1298 | port->next_port_in_aggregator = aggregator->lag_ports; | |
1da177e4 | 1299 | port->aggregator->num_of_ports++; |
128ea6c3 | 1300 | aggregator->lag_ports = port; |
a4aee5c8 JP |
1301 | pr_debug("Port %d joined LAG %d(existing LAG)\n", |
1302 | port->actor_port_number, | |
1303 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1304 | |
1305 | // mark this port as selected | |
1306 | port->sm_vars |= AD_PORT_SELECTED; | |
1307 | found = 1; | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | // the port couldn't find an aggregator - attach it to a new aggregator | |
1313 | if (!found) { | |
1314 | if (free_aggregator) { | |
1315 | // assign port a new aggregator | |
1316 | port->aggregator = free_aggregator; | |
128ea6c3 BD |
1317 | port->actor_port_aggregator_identifier = |
1318 | port->aggregator->aggregator_identifier; | |
1da177e4 LT |
1319 | |
1320 | // update the new aggregator's parameters | |
1321 | // if port was responsed from the end-user | |
7bfc4753 BD |
1322 | if (port->actor_oper_port_key & AD_DUPLEX_KEY_BITS) |
1323 | /* if port is full duplex */ | |
1624db7b | 1324 | port->aggregator->is_individual = false; |
7bfc4753 | 1325 | else |
1624db7b | 1326 | port->aggregator->is_individual = true; |
1da177e4 LT |
1327 | |
1328 | port->aggregator->actor_admin_aggregator_key = port->actor_admin_port_key; | |
1329 | port->aggregator->actor_oper_aggregator_key = port->actor_oper_port_key; | |
128ea6c3 BD |
1330 | port->aggregator->partner_system = |
1331 | port->partner_oper.system; | |
1332 | port->aggregator->partner_system_priority = | |
1333 | port->partner_oper.system_priority; | |
1055c9ab | 1334 | port->aggregator->partner_oper_aggregator_key = port->partner_oper.key; |
1da177e4 LT |
1335 | port->aggregator->receive_state = 1; |
1336 | port->aggregator->transmit_state = 1; | |
1337 | port->aggregator->lag_ports = port; | |
1338 | port->aggregator->num_of_ports++; | |
1339 | ||
1340 | // mark this port as selected | |
1341 | port->sm_vars |= AD_PORT_SELECTED; | |
1342 | ||
a4aee5c8 JP |
1343 | pr_debug("Port %d joined LAG %d(new LAG)\n", |
1344 | port->actor_port_number, | |
1345 | port->aggregator->aggregator_identifier); | |
1da177e4 | 1346 | } else { |
a4aee5c8 | 1347 | pr_err("%s: Port %d (on %s) did not find a suitable aggregator\n", |
471cb5a3 | 1348 | port->slave->bond->dev->name, |
1da177e4 LT |
1349 | port->actor_port_number, port->slave->dev->name); |
1350 | } | |
1351 | } | |
1352 | // if all aggregator's ports are READY_N == TRUE, set ready=TRUE in all aggregator's ports | |
1353 | // else set ready=FALSE in all aggregator's ports | |
1354 | __set_agg_ports_ready(port->aggregator, __agg_ports_are_ready(port->aggregator)); | |
1355 | ||
fd989c83 JV |
1356 | aggregator = __get_first_agg(port); |
1357 | ad_agg_selection_logic(aggregator); | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * Decide if "agg" is a better choice for the new active aggregator that | |
1362 | * the current best, according to the ad_select policy. | |
1363 | */ | |
1364 | static struct aggregator *ad_agg_selection_test(struct aggregator *best, | |
1365 | struct aggregator *curr) | |
1366 | { | |
1367 | /* | |
1368 | * 0. If no best, select current. | |
1369 | * | |
1370 | * 1. If the current agg is not individual, and the best is | |
1371 | * individual, select current. | |
1372 | * | |
1373 | * 2. If current agg is individual and the best is not, keep best. | |
1374 | * | |
1375 | * 3. Therefore, current and best are both individual or both not | |
1376 | * individual, so: | |
1377 | * | |
1378 | * 3a. If current agg partner replied, and best agg partner did not, | |
1379 | * select current. | |
1380 | * | |
1381 | * 3b. If current agg partner did not reply and best agg partner | |
1382 | * did reply, keep best. | |
1383 | * | |
1384 | * 4. Therefore, current and best both have partner replies or | |
1385 | * both do not, so perform selection policy: | |
1386 | * | |
1387 | * BOND_AD_COUNT: Select by count of ports. If count is equal, | |
1388 | * select by bandwidth. | |
1389 | * | |
1390 | * BOND_AD_STABLE, BOND_AD_BANDWIDTH: Select by bandwidth. | |
1391 | */ | |
1392 | if (!best) | |
1393 | return curr; | |
1394 | ||
1395 | if (!curr->is_individual && best->is_individual) | |
1396 | return curr; | |
1397 | ||
1398 | if (curr->is_individual && !best->is_individual) | |
1399 | return best; | |
1400 | ||
1401 | if (__agg_has_partner(curr) && !__agg_has_partner(best)) | |
1402 | return curr; | |
1403 | ||
1404 | if (!__agg_has_partner(curr) && __agg_has_partner(best)) | |
1405 | return best; | |
1406 | ||
1407 | switch (__get_agg_selection_mode(curr->lag_ports)) { | |
1408 | case BOND_AD_COUNT: | |
1409 | if (curr->num_of_ports > best->num_of_ports) | |
1410 | return curr; | |
1411 | ||
1412 | if (curr->num_of_ports < best->num_of_ports) | |
1413 | return best; | |
1414 | ||
1415 | /*FALLTHROUGH*/ | |
1416 | case BOND_AD_STABLE: | |
1417 | case BOND_AD_BANDWIDTH: | |
1418 | if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best)) | |
1419 | return curr; | |
1420 | ||
1421 | break; | |
1422 | ||
1423 | default: | |
a4aee5c8 | 1424 | pr_warning("%s: Impossible agg select mode %d\n", |
471cb5a3 | 1425 | curr->slave->bond->dev->name, |
e5e2a8fd | 1426 | __get_agg_selection_mode(curr->lag_ports)); |
fd989c83 | 1427 | break; |
1da177e4 | 1428 | } |
fd989c83 JV |
1429 | |
1430 | return best; | |
1da177e4 LT |
1431 | } |
1432 | ||
4cd6fe1c SH |
1433 | static int agg_device_up(const struct aggregator *agg) |
1434 | { | |
2430af8b JB |
1435 | struct port *port = agg->lag_ports; |
1436 | if (!port) | |
1437 | return 0; | |
1438 | return (netif_running(port->slave->dev) && | |
1439 | netif_carrier_ok(port->slave->dev)); | |
4cd6fe1c SH |
1440 | } |
1441 | ||
1da177e4 LT |
1442 | /** |
1443 | * ad_agg_selection_logic - select an aggregation group for a team | |
1444 | * @aggregator: the aggregator we're looking at | |
1445 | * | |
1446 | * It is assumed that only one aggregator may be selected for a team. | |
fd989c83 JV |
1447 | * |
1448 | * The logic of this function is to select the aggregator according to | |
1449 | * the ad_select policy: | |
1450 | * | |
1451 | * BOND_AD_STABLE: select the aggregator with the most ports attached to | |
1452 | * it, and to reselect the active aggregator only if the previous | |
1453 | * aggregator has no more ports related to it. | |
1454 | * | |
1455 | * BOND_AD_BANDWIDTH: select the aggregator with the highest total | |
1456 | * bandwidth, and reselect whenever a link state change takes place or the | |
1457 | * set of slaves in the bond changes. | |
1458 | * | |
1459 | * BOND_AD_COUNT: select the aggregator with largest number of ports | |
1460 | * (slaves), and reselect whenever a link state change takes place or the | |
1461 | * set of slaves in the bond changes. | |
1da177e4 LT |
1462 | * |
1463 | * FIXME: this function MUST be called with the first agg in the bond, or | |
1464 | * __get_active_agg() won't work correctly. This function should be better | |
1465 | * called with the bond itself, and retrieve the first agg from it. | |
1466 | */ | |
fd989c83 | 1467 | static void ad_agg_selection_logic(struct aggregator *agg) |
1da177e4 | 1468 | { |
fd989c83 | 1469 | struct aggregator *best, *active, *origin; |
bef1fcce VF |
1470 | struct bonding *bond = agg->slave->bond; |
1471 | struct list_head *iter; | |
1472 | struct slave *slave; | |
1da177e4 | 1473 | struct port *port; |
1da177e4 | 1474 | |
fd989c83 | 1475 | origin = agg; |
fd989c83 | 1476 | active = __get_active_agg(agg); |
4cd6fe1c | 1477 | best = (active && agg_device_up(active)) ? active : NULL; |
1da177e4 | 1478 | |
be79bd04 | 1479 | rcu_read_lock(); |
1480 | bond_for_each_slave_rcu(bond, slave, iter) { | |
bef1fcce VF |
1481 | agg = &(SLAVE_AD_INFO(slave).aggregator); |
1482 | ||
fd989c83 JV |
1483 | agg->is_active = 0; |
1484 | ||
4cd6fe1c | 1485 | if (agg->num_of_ports && agg_device_up(agg)) |
fd989c83 | 1486 | best = ad_agg_selection_test(best, agg); |
bef1fcce | 1487 | } |
fd989c83 JV |
1488 | |
1489 | if (best && | |
1490 | __get_agg_selection_mode(best->lag_ports) == BOND_AD_STABLE) { | |
1491 | /* | |
1492 | * For the STABLE policy, don't replace the old active | |
1493 | * aggregator if it's still active (it has an answering | |
1494 | * partner) or if both the best and active don't have an | |
1495 | * answering partner. | |
1496 | */ | |
1497 | if (active && active->lag_ports && | |
1498 | active->lag_ports->is_enabled && | |
1499 | (__agg_has_partner(active) || | |
1500 | (!__agg_has_partner(active) && !__agg_has_partner(best)))) { | |
1501 | if (!(!active->actor_oper_aggregator_key && | |
1502 | best->actor_oper_aggregator_key)) { | |
1503 | best = NULL; | |
1504 | active->is_active = 1; | |
1da177e4 LT |
1505 | } |
1506 | } | |
fd989c83 | 1507 | } |
1da177e4 | 1508 | |
fd989c83 JV |
1509 | if (best && (best == active)) { |
1510 | best = NULL; | |
1511 | active->is_active = 1; | |
1da177e4 LT |
1512 | } |
1513 | ||
be79bd04 | 1514 | /* if there is new best aggregator, activate it */ |
fd989c83 | 1515 | if (best) { |
5a03cdb7 | 1516 | pr_debug("best Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1517 | best->aggregator_identifier, best->num_of_ports, |
1518 | best->actor_oper_aggregator_key, | |
1519 | best->partner_oper_aggregator_key, | |
1520 | best->is_individual, best->is_active); | |
5a03cdb7 | 1521 | pr_debug("best ports %p slave %p %s\n", |
a4aee5c8 JP |
1522 | best->lag_ports, best->slave, |
1523 | best->slave ? best->slave->dev->name : "NULL"); | |
fd989c83 | 1524 | |
be79bd04 | 1525 | bond_for_each_slave_rcu(bond, slave, iter) { |
bef1fcce | 1526 | agg = &(SLAVE_AD_INFO(slave).aggregator); |
fd989c83 | 1527 | |
5a03cdb7 | 1528 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1529 | agg->aggregator_identifier, agg->num_of_ports, |
1530 | agg->actor_oper_aggregator_key, | |
1531 | agg->partner_oper_aggregator_key, | |
1532 | agg->is_individual, agg->is_active); | |
1da177e4 LT |
1533 | } |
1534 | ||
be79bd04 | 1535 | /* check if any partner replys */ |
fd989c83 | 1536 | if (best->is_individual) { |
a4aee5c8 | 1537 | pr_warning("%s: Warning: No 802.3ad response from the link partner for any adapters in the bond\n", |
be79bd04 | 1538 | best->slave ? |
1539 | best->slave->bond->dev->name : "NULL"); | |
1da177e4 LT |
1540 | } |
1541 | ||
fd989c83 | 1542 | best->is_active = 1; |
5a03cdb7 | 1543 | pr_debug("LAG %d chosen as the active LAG\n", |
a4aee5c8 | 1544 | best->aggregator_identifier); |
5a03cdb7 | 1545 | pr_debug("Agg=%d; P=%d; a k=%d; p k=%d; Ind=%d; Act=%d\n", |
a4aee5c8 JP |
1546 | best->aggregator_identifier, best->num_of_ports, |
1547 | best->actor_oper_aggregator_key, | |
1548 | best->partner_oper_aggregator_key, | |
1549 | best->is_individual, best->is_active); | |
1da177e4 | 1550 | |
be79bd04 | 1551 | /* disable the ports that were related to the former active_aggregator */ |
fd989c83 JV |
1552 | if (active) { |
1553 | for (port = active->lag_ports; port; | |
1554 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1555 | __disable_port(port); |
1556 | } | |
1557 | } | |
1558 | } | |
1559 | ||
fd989c83 JV |
1560 | /* |
1561 | * if the selected aggregator is of join individuals | |
1562 | * (partner_system is NULL), enable their ports | |
1563 | */ | |
1564 | active = __get_active_agg(origin); | |
1da177e4 | 1565 | |
fd989c83 JV |
1566 | if (active) { |
1567 | if (!__agg_has_partner(active)) { | |
1568 | for (port = active->lag_ports; port; | |
1569 | port = port->next_port_in_aggregator) { | |
1da177e4 LT |
1570 | __enable_port(port); |
1571 | } | |
1572 | } | |
1573 | } | |
fd989c83 | 1574 | |
be79bd04 | 1575 | rcu_read_unlock(); |
1576 | ||
bef1fcce | 1577 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
1578 | } |
1579 | ||
1580 | /** | |
1581 | * ad_clear_agg - clear a given aggregator's parameters | |
1582 | * @aggregator: the aggregator we're looking at | |
1583 | * | |
1584 | */ | |
1585 | static void ad_clear_agg(struct aggregator *aggregator) | |
1586 | { | |
1587 | if (aggregator) { | |
1624db7b | 1588 | aggregator->is_individual = false; |
1da177e4 LT |
1589 | aggregator->actor_admin_aggregator_key = 0; |
1590 | aggregator->actor_oper_aggregator_key = 0; | |
1591 | aggregator->partner_system = null_mac_addr; | |
1592 | aggregator->partner_system_priority = 0; | |
1593 | aggregator->partner_oper_aggregator_key = 0; | |
1594 | aggregator->receive_state = 0; | |
1595 | aggregator->transmit_state = 0; | |
1596 | aggregator->lag_ports = NULL; | |
1597 | aggregator->is_active = 0; | |
1598 | aggregator->num_of_ports = 0; | |
a4aee5c8 JP |
1599 | pr_debug("LAG %d was cleared\n", |
1600 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1601 | } |
1602 | } | |
1603 | ||
1604 | /** | |
1605 | * ad_initialize_agg - initialize a given aggregator's parameters | |
1606 | * @aggregator: the aggregator we're looking at | |
1607 | * | |
1608 | */ | |
1609 | static void ad_initialize_agg(struct aggregator *aggregator) | |
1610 | { | |
1611 | if (aggregator) { | |
1612 | ad_clear_agg(aggregator); | |
1613 | ||
1614 | aggregator->aggregator_mac_address = null_mac_addr; | |
1615 | aggregator->aggregator_identifier = 0; | |
1616 | aggregator->slave = NULL; | |
1617 | } | |
1618 | } | |
1619 | ||
1620 | /** | |
1621 | * ad_initialize_port - initialize a given port's parameters | |
1622 | * @aggregator: the aggregator we're looking at | |
1623 | * @lacp_fast: boolean. whether fast periodic should be used | |
1624 | * | |
1625 | */ | |
1626 | static void ad_initialize_port(struct port *port, int lacp_fast) | |
1627 | { | |
c7e703d0 HE |
1628 | static const struct port_params tmpl = { |
1629 | .system_priority = 0xffff, | |
1630 | .key = 1, | |
1631 | .port_number = 1, | |
1632 | .port_priority = 0xff, | |
1633 | .port_state = 1, | |
1634 | }; | |
7addeef6 HE |
1635 | static const struct lacpdu lacpdu = { |
1636 | .subtype = 0x01, | |
1637 | .version_number = 0x01, | |
1638 | .tlv_type_actor_info = 0x01, | |
1639 | .actor_information_length = 0x14, | |
1640 | .tlv_type_partner_info = 0x02, | |
1641 | .partner_information_length = 0x14, | |
1642 | .tlv_type_collector_info = 0x03, | |
1643 | .collector_information_length = 0x10, | |
1644 | .collector_max_delay = htons(AD_COLLECTOR_MAX_DELAY), | |
1645 | }; | |
c7e703d0 | 1646 | |
1da177e4 LT |
1647 | if (port) { |
1648 | port->actor_port_number = 1; | |
1649 | port->actor_port_priority = 0xff; | |
1650 | port->actor_system = null_mac_addr; | |
1651 | port->actor_system_priority = 0xffff; | |
1652 | port->actor_port_aggregator_identifier = 0; | |
d238d458 | 1653 | port->ntt = false; |
1da177e4 LT |
1654 | port->actor_admin_port_key = 1; |
1655 | port->actor_oper_port_key = 1; | |
1656 | port->actor_admin_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1657 | port->actor_oper_port_state = AD_STATE_AGGREGATION | AD_STATE_LACP_ACTIVITY; | |
1658 | ||
7bfc4753 | 1659 | if (lacp_fast) |
1da177e4 | 1660 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; |
1da177e4 | 1661 | |
c7e703d0 HE |
1662 | memcpy(&port->partner_admin, &tmpl, sizeof(tmpl)); |
1663 | memcpy(&port->partner_oper, &tmpl, sizeof(tmpl)); | |
1664 | ||
f48127b6 | 1665 | port->is_enabled = true; |
1da177e4 LT |
1666 | // ****** private parameters ****** |
1667 | port->sm_vars = 0x3; | |
1668 | port->sm_rx_state = 0; | |
1669 | port->sm_rx_timer_counter = 0; | |
1670 | port->sm_periodic_state = 0; | |
1671 | port->sm_periodic_timer_counter = 0; | |
1672 | port->sm_mux_state = 0; | |
1673 | port->sm_mux_timer_counter = 0; | |
1674 | port->sm_tx_state = 0; | |
1675 | port->sm_tx_timer_counter = 0; | |
1676 | port->slave = NULL; | |
1677 | port->aggregator = NULL; | |
1678 | port->next_port_in_aggregator = NULL; | |
1679 | port->transaction_id = 0; | |
1680 | ||
7addeef6 | 1681 | memcpy(&port->lacpdu, &lacpdu, sizeof(lacpdu)); |
1da177e4 LT |
1682 | } |
1683 | } | |
1684 | ||
1685 | /** | |
1686 | * ad_enable_collecting_distributing - enable a port's transmit/receive | |
1687 | * @port: the port we're looking at | |
1688 | * | |
1689 | * Enable @port if it's in an active aggregator | |
1690 | */ | |
1691 | static void ad_enable_collecting_distributing(struct port *port) | |
1692 | { | |
1693 | if (port->aggregator->is_active) { | |
a4aee5c8 JP |
1694 | pr_debug("Enabling port %d(LAG %d)\n", |
1695 | port->actor_port_number, | |
1696 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1697 | __enable_port(port); |
1698 | } | |
1699 | } | |
1700 | ||
1701 | /** | |
1702 | * ad_disable_collecting_distributing - disable a port's transmit/receive | |
1703 | * @port: the port we're looking at | |
1704 | * | |
1705 | */ | |
1706 | static void ad_disable_collecting_distributing(struct port *port) | |
1707 | { | |
1708 | if (port->aggregator && MAC_ADDRESS_COMPARE(&(port->aggregator->partner_system), &(null_mac_addr))) { | |
a4aee5c8 JP |
1709 | pr_debug("Disabling port %d(LAG %d)\n", |
1710 | port->actor_port_number, | |
1711 | port->aggregator->aggregator_identifier); | |
1da177e4 LT |
1712 | __disable_port(port); |
1713 | } | |
1714 | } | |
1715 | ||
1716 | #if 0 | |
1717 | /** | |
1718 | * ad_marker_info_send - send a marker information frame | |
1719 | * @port: the port we're looking at | |
1720 | * | |
1721 | * This function does nothing since we decided not to implement send and handle | |
1722 | * response for marker PDU's, in this stage, but only to respond to marker | |
1723 | * information. | |
1724 | */ | |
1725 | static void ad_marker_info_send(struct port *port) | |
1726 | { | |
1c3f0b8e | 1727 | struct bond_marker marker; |
1da177e4 LT |
1728 | u16 index; |
1729 | ||
1730 | // fill the marker PDU with the appropriate values | |
1731 | marker.subtype = 0x02; | |
1732 | marker.version_number = 0x01; | |
1733 | marker.tlv_type = AD_MARKER_INFORMATION_SUBTYPE; | |
1734 | marker.marker_length = 0x16; | |
1735 | // convert requester_port to Big Endian | |
1736 | marker.requester_port = (((port->actor_port_number & 0xFF) << 8) |((u16)(port->actor_port_number & 0xFF00) >> 8)); | |
1737 | marker.requester_system = port->actor_system; | |
1738 | // convert requester_port(u32) to Big Endian | |
128ea6c3 BD |
1739 | marker.requester_transaction_id = |
1740 | (((++port->transaction_id & 0xFF) << 24) | |
1741 | | ((port->transaction_id & 0xFF00) << 8) | |
1742 | | ((port->transaction_id & 0xFF0000) >> 8) | |
1743 | | ((port->transaction_id & 0xFF000000) >> 24)); | |
1da177e4 LT |
1744 | marker.pad = 0; |
1745 | marker.tlv_type_terminator = 0x00; | |
1746 | marker.terminator_length = 0x00; | |
128ea6c3 BD |
1747 | for (index = 0; index < 90; index++) |
1748 | marker.reserved_90[index] = 0; | |
1da177e4 LT |
1749 | |
1750 | // send the marker information | |
1751 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1752 | pr_debug("Sent Marker Information on port %d\n", |
1753 | port->actor_port_number); | |
1da177e4 LT |
1754 | } |
1755 | } | |
1756 | #endif | |
1757 | ||
1758 | /** | |
1759 | * ad_marker_info_received - handle receive of a Marker information frame | |
1760 | * @marker_info: Marker info received | |
1761 | * @port: the port we're looking at | |
1762 | * | |
1763 | */ | |
1c3f0b8e MD |
1764 | static void ad_marker_info_received(struct bond_marker *marker_info, |
1765 | struct port *port) | |
1da177e4 | 1766 | { |
1c3f0b8e | 1767 | struct bond_marker marker; |
1da177e4 LT |
1768 | |
1769 | // copy the received marker data to the response marker | |
1770 | //marker = *marker_info; | |
1c3f0b8e | 1771 | memcpy(&marker, marker_info, sizeof(struct bond_marker)); |
1da177e4 | 1772 | // change the marker subtype to marker response |
128ea6c3 | 1773 | marker.tlv_type = AD_MARKER_RESPONSE_SUBTYPE; |
1da177e4 LT |
1774 | // send the marker response |
1775 | ||
1776 | if (ad_marker_send(port, &marker) >= 0) { | |
a4aee5c8 JP |
1777 | pr_debug("Sent Marker Response on port %d\n", |
1778 | port->actor_port_number); | |
1da177e4 LT |
1779 | } |
1780 | } | |
1781 | ||
1782 | /** | |
1783 | * ad_marker_response_received - handle receive of a marker response frame | |
1784 | * @marker: marker PDU received | |
1785 | * @port: the port we're looking at | |
1786 | * | |
1787 | * This function does nothing since we decided not to implement send and handle | |
1788 | * response for marker PDU's, in this stage, but only to respond to marker | |
1789 | * information. | |
1790 | */ | |
1c3f0b8e MD |
1791 | static void ad_marker_response_received(struct bond_marker *marker, |
1792 | struct port *port) | |
1da177e4 | 1793 | { |
128ea6c3 BD |
1794 | marker = NULL; /* just to satisfy the compiler */ |
1795 | port = NULL; /* just to satisfy the compiler */ | |
1da177e4 LT |
1796 | // DO NOTHING, SINCE WE DECIDED NOT TO IMPLEMENT THIS FEATURE FOR NOW |
1797 | } | |
1798 | ||
1da177e4 LT |
1799 | ////////////////////////////////////////////////////////////////////////////////////// |
1800 | // ================= AD exported functions to the main bonding code ================== | |
1801 | ////////////////////////////////////////////////////////////////////////////////////// | |
1802 | ||
1803 | // Check aggregators status in team every T seconds | |
1804 | #define AD_AGGREGATOR_SELECTION_TIMER 8 | |
1805 | ||
fd989c83 JV |
1806 | /* |
1807 | * bond_3ad_initiate_agg_selection(struct bonding *bond) | |
1808 | * | |
1809 | * Set the aggregation selection timer, to initiate an agg selection in | |
1810 | * the very near future. Called during first initialization, and during | |
1811 | * any down to up transitions of the bond. | |
1812 | */ | |
1813 | void bond_3ad_initiate_agg_selection(struct bonding *bond, int timeout) | |
1814 | { | |
1815 | BOND_AD_INFO(bond).agg_select_timer = timeout; | |
fd989c83 JV |
1816 | } |
1817 | ||
1da177e4 LT |
1818 | static u16 aggregator_identifier; |
1819 | ||
1820 | /** | |
1821 | * bond_3ad_initialize - initialize a bond's 802.3ad parameters and structures | |
1822 | * @bond: bonding struct to work on | |
1823 | * @tick_resolution: tick duration (millisecond resolution) | |
1da177e4 LT |
1824 | * |
1825 | * Can be called only after the mac address of the bond is set. | |
1826 | */ | |
56d00c67 | 1827 | void bond_3ad_initialize(struct bonding *bond, u16 tick_resolution) |
3a6d54c5 | 1828 | { |
1da177e4 | 1829 | // check that the bond is not initialized yet |
3a6d54c5 JP |
1830 | if (MAC_ADDRESS_COMPARE(&(BOND_AD_INFO(bond).system.sys_mac_addr), |
1831 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1832 | |
1833 | aggregator_identifier = 0; | |
1834 | ||
1da177e4 LT |
1835 | BOND_AD_INFO(bond).system.sys_priority = 0xFFFF; |
1836 | BOND_AD_INFO(bond).system.sys_mac_addr = *((struct mac_addr *)bond->dev->dev_addr); | |
1837 | ||
1838 | // initialize how many times this module is called in one second(should be about every 100ms) | |
1839 | ad_ticks_per_sec = tick_resolution; | |
1840 | ||
fd989c83 JV |
1841 | bond_3ad_initiate_agg_selection(bond, |
1842 | AD_AGGREGATOR_SELECTION_TIMER * | |
1843 | ad_ticks_per_sec); | |
1da177e4 LT |
1844 | } |
1845 | } | |
1846 | ||
1847 | /** | |
1848 | * bond_3ad_bind_slave - initialize a slave's port | |
1849 | * @slave: slave struct to work on | |
1850 | * | |
1851 | * Returns: 0 on success | |
1852 | * < 0 on error | |
1853 | */ | |
1854 | int bond_3ad_bind_slave(struct slave *slave) | |
1855 | { | |
1856 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
1857 | struct port *port; | |
1858 | struct aggregator *aggregator; | |
1859 | ||
1860 | if (bond == NULL) { | |
a4aee5c8 | 1861 | pr_err("%s: The slave %s is not attached to its bond\n", |
471cb5a3 | 1862 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
1863 | return -1; |
1864 | } | |
1865 | ||
b595076a | 1866 | //check that the slave has not been initialized yet. |
1da177e4 LT |
1867 | if (SLAVE_AD_INFO(slave).port.slave != slave) { |
1868 | ||
1869 | // port initialization | |
1870 | port = &(SLAVE_AD_INFO(slave).port); | |
1871 | ||
bf0239a9 | 1872 | ad_initialize_port(port, bond->params.lacp_fast); |
1da177e4 | 1873 | |
e0809dbc | 1874 | __initialize_port_locks(slave); |
1da177e4 LT |
1875 | port->slave = slave; |
1876 | port->actor_port_number = SLAVE_AD_INFO(slave).id; | |
1877 | // key is determined according to the link speed, duplex and user key(which is yet not supported) | |
1878 | // ------------------------------------------------------------ | |
1879 | // Port key : | User key | Speed |Duplex| | |
1880 | // ------------------------------------------------------------ | |
1881 | // 16 6 1 0 | |
1882 | port->actor_admin_port_key = 0; // initialize this parameter | |
1883 | port->actor_admin_port_key |= __get_duplex(port); | |
1884 | port->actor_admin_port_key |= (__get_link_speed(port) << 1); | |
1885 | port->actor_oper_port_key = port->actor_admin_port_key; | |
1886 | // if the port is not full duplex, then the port should be not lacp Enabled | |
7bfc4753 | 1887 | if (!(port->actor_oper_port_key & AD_DUPLEX_KEY_BITS)) |
1da177e4 | 1888 | port->sm_vars &= ~AD_PORT_LACP_ENABLED; |
1da177e4 LT |
1889 | // actor system is the bond's system |
1890 | port->actor_system = BOND_AD_INFO(bond).system.sys_mac_addr; | |
1891 | // tx timer(to verify that no more than MAX_TX_IN_SECOND lacpdu's are sent in one second) | |
1892 | port->sm_tx_timer_counter = ad_ticks_per_sec/AD_MAX_TX_IN_SECOND; | |
1893 | port->aggregator = NULL; | |
1894 | port->next_port_in_aggregator = NULL; | |
1895 | ||
1896 | __disable_port(port); | |
1da177e4 LT |
1897 | |
1898 | // aggregator initialization | |
1899 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1900 | ||
1901 | ad_initialize_agg(aggregator); | |
1902 | ||
1903 | aggregator->aggregator_mac_address = *((struct mac_addr *)bond->dev->dev_addr); | |
1904 | aggregator->aggregator_identifier = (++aggregator_identifier); | |
1905 | aggregator->slave = slave; | |
1906 | aggregator->is_active = 0; | |
1907 | aggregator->num_of_ports = 0; | |
1908 | } | |
1909 | ||
1910 | return 0; | |
1911 | } | |
1912 | ||
1913 | /** | |
1914 | * bond_3ad_unbind_slave - deinitialize a slave's port | |
1915 | * @slave: slave struct to work on | |
1916 | * | |
1917 | * Search for the aggregator that is related to this port, remove the | |
1918 | * aggregator and assign another aggregator for other port related to it | |
1919 | * (if any), and remove the port. | |
1920 | */ | |
1921 | void bond_3ad_unbind_slave(struct slave *slave) | |
1922 | { | |
1923 | struct port *port, *prev_port, *temp_port; | |
1924 | struct aggregator *aggregator, *new_aggregator, *temp_aggregator; | |
1925 | int select_new_active_agg = 0; | |
0b088264 VF |
1926 | struct bonding *bond = slave->bond; |
1927 | struct slave *slave_iter; | |
1928 | struct list_head *iter; | |
a361c83c | 1929 | |
1da177e4 LT |
1930 | // find the aggregator related to this slave |
1931 | aggregator = &(SLAVE_AD_INFO(slave).aggregator); | |
1932 | ||
1933 | // find the port related to this slave | |
1934 | port = &(SLAVE_AD_INFO(slave).port); | |
1935 | ||
1936 | // if slave is null, the whole port is not initialized | |
1937 | if (!port->slave) { | |
a4aee5c8 | 1938 | pr_warning("Warning: %s: Trying to unbind an uninitialized port on %s\n", |
471cb5a3 | 1939 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
1940 | return; |
1941 | } | |
1942 | ||
a4aee5c8 JP |
1943 | pr_debug("Unbinding Link Aggregation Group %d\n", |
1944 | aggregator->aggregator_identifier); | |
1da177e4 LT |
1945 | |
1946 | /* Tell the partner that this port is not suitable for aggregation */ | |
1947 | port->actor_oper_port_state &= ~AD_STATE_AGGREGATION; | |
1948 | __update_lacpdu_from_port(port); | |
1949 | ad_lacpdu_send(port); | |
1950 | ||
1951 | // check if this aggregator is occupied | |
1952 | if (aggregator->lag_ports) { | |
1953 | // check if there are other ports related to this aggregator except | |
1954 | // the port related to this slave(thats ensure us that there is a | |
1955 | // reason to search for new aggregator, and that we will find one | |
1956 | if ((aggregator->lag_ports != port) || (aggregator->lag_ports->next_port_in_aggregator)) { | |
1957 | // find new aggregator for the related port(s) | |
0b088264 VF |
1958 | bond_for_each_slave(bond, slave_iter, iter) { |
1959 | new_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
fd589a8f | 1960 | // if the new aggregator is empty, or it is connected to our port only |
7bfc4753 BD |
1961 | if (!new_aggregator->lag_ports |
1962 | || ((new_aggregator->lag_ports == port) | |
1963 | && !new_aggregator->lag_ports->next_port_in_aggregator)) | |
1da177e4 | 1964 | break; |
1da177e4 | 1965 | } |
0b088264 VF |
1966 | if (!slave_iter) |
1967 | new_aggregator = NULL; | |
1da177e4 LT |
1968 | // if new aggregator found, copy the aggregator's parameters |
1969 | // and connect the related lag_ports to the new aggregator | |
1970 | if ((new_aggregator) && ((!new_aggregator->lag_ports) || ((new_aggregator->lag_ports == port) && !new_aggregator->lag_ports->next_port_in_aggregator))) { | |
a4aee5c8 JP |
1971 | pr_debug("Some port(s) related to LAG %d - replaceing with LAG %d\n", |
1972 | aggregator->aggregator_identifier, | |
1973 | new_aggregator->aggregator_identifier); | |
1da177e4 LT |
1974 | |
1975 | if ((new_aggregator->lag_ports == port) && new_aggregator->is_active) { | |
a4aee5c8 | 1976 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 1977 | aggregator->slave->bond->dev->name); |
1da177e4 LT |
1978 | // select new active aggregator |
1979 | select_new_active_agg = 1; | |
1980 | } | |
1981 | ||
1982 | new_aggregator->is_individual = aggregator->is_individual; | |
1983 | new_aggregator->actor_admin_aggregator_key = aggregator->actor_admin_aggregator_key; | |
1984 | new_aggregator->actor_oper_aggregator_key = aggregator->actor_oper_aggregator_key; | |
1985 | new_aggregator->partner_system = aggregator->partner_system; | |
1986 | new_aggregator->partner_system_priority = aggregator->partner_system_priority; | |
1987 | new_aggregator->partner_oper_aggregator_key = aggregator->partner_oper_aggregator_key; | |
1988 | new_aggregator->receive_state = aggregator->receive_state; | |
1989 | new_aggregator->transmit_state = aggregator->transmit_state; | |
1990 | new_aggregator->lag_ports = aggregator->lag_ports; | |
1991 | new_aggregator->is_active = aggregator->is_active; | |
1992 | new_aggregator->num_of_ports = aggregator->num_of_ports; | |
1993 | ||
1994 | // update the information that is written on the ports about the aggregator | |
128ea6c3 BD |
1995 | for (temp_port = aggregator->lag_ports; temp_port; |
1996 | temp_port = temp_port->next_port_in_aggregator) { | |
1997 | temp_port->aggregator = new_aggregator; | |
1da177e4 LT |
1998 | temp_port->actor_port_aggregator_identifier = new_aggregator->aggregator_identifier; |
1999 | } | |
2000 | ||
2001 | // clear the aggregator | |
2002 | ad_clear_agg(aggregator); | |
a361c83c | 2003 | |
7bfc4753 | 2004 | if (select_new_active_agg) |
1da177e4 | 2005 | ad_agg_selection_logic(__get_first_agg(port)); |
1da177e4 | 2006 | } else { |
a4aee5c8 | 2007 | pr_warning("%s: Warning: unbinding aggregator, and could not find a new aggregator for its ports\n", |
471cb5a3 | 2008 | slave->bond->dev->name); |
1da177e4 LT |
2009 | } |
2010 | } else { // in case that the only port related to this aggregator is the one we want to remove | |
2011 | select_new_active_agg = aggregator->is_active; | |
2012 | // clear the aggregator | |
2013 | ad_clear_agg(aggregator); | |
2014 | if (select_new_active_agg) { | |
a4aee5c8 | 2015 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2016 | slave->bond->dev->name); |
1da177e4 | 2017 | // select new active aggregator |
74684493 VF |
2018 | temp_aggregator = __get_first_agg(port); |
2019 | if (temp_aggregator) | |
2020 | ad_agg_selection_logic(temp_aggregator); | |
1da177e4 LT |
2021 | } |
2022 | } | |
2023 | } | |
2024 | ||
5a03cdb7 | 2025 | pr_debug("Unbinding port %d\n", port->actor_port_number); |
1da177e4 | 2026 | // find the aggregator that this port is connected to |
0b088264 VF |
2027 | bond_for_each_slave(bond, slave_iter, iter) { |
2028 | temp_aggregator = &(SLAVE_AD_INFO(slave_iter).aggregator); | |
1da177e4 LT |
2029 | prev_port = NULL; |
2030 | // search the port in the aggregator's related ports | |
128ea6c3 BD |
2031 | for (temp_port = temp_aggregator->lag_ports; temp_port; |
2032 | prev_port = temp_port, | |
2033 | temp_port = temp_port->next_port_in_aggregator) { | |
1da177e4 | 2034 | if (temp_port == port) { // the aggregator found - detach the port from this aggregator |
7bfc4753 | 2035 | if (prev_port) |
1da177e4 | 2036 | prev_port->next_port_in_aggregator = temp_port->next_port_in_aggregator; |
7bfc4753 | 2037 | else |
1da177e4 | 2038 | temp_aggregator->lag_ports = temp_port->next_port_in_aggregator; |
1da177e4 | 2039 | temp_aggregator->num_of_ports--; |
128ea6c3 | 2040 | if (temp_aggregator->num_of_ports == 0) { |
1da177e4 LT |
2041 | select_new_active_agg = temp_aggregator->is_active; |
2042 | // clear the aggregator | |
2043 | ad_clear_agg(temp_aggregator); | |
2044 | if (select_new_active_agg) { | |
a4aee5c8 | 2045 | pr_info("%s: Removing an active aggregator\n", |
471cb5a3 | 2046 | slave->bond->dev->name); |
1da177e4 LT |
2047 | // select new active aggregator |
2048 | ad_agg_selection_logic(__get_first_agg(port)); | |
2049 | } | |
2050 | } | |
2051 | break; | |
2052 | } | |
2053 | } | |
2054 | } | |
128ea6c3 | 2055 | port->slave = NULL; |
1da177e4 LT |
2056 | } |
2057 | ||
2058 | /** | |
2059 | * bond_3ad_state_machine_handler - handle state machines timeout | |
2060 | * @bond: bonding struct to work on | |
2061 | * | |
2062 | * The state machine handling concept in this module is to check every tick | |
2063 | * which state machine should operate any function. The execution order is | |
2064 | * round robin, so when we have an interaction between state machines, the | |
2065 | * reply of one to each other might be delayed until next tick. | |
2066 | * | |
2067 | * This function also complete the initialization when the agg_select_timer | |
2068 | * times out, and it selects an aggregator for the ports that are yet not | |
2069 | * related to any aggregator, and selects the active aggregator for a bond. | |
2070 | */ | |
1b76b316 | 2071 | void bond_3ad_state_machine_handler(struct work_struct *work) |
1da177e4 | 2072 | { |
1b76b316 JV |
2073 | struct bonding *bond = container_of(work, struct bonding, |
2074 | ad_work.work); | |
1da177e4 | 2075 | struct aggregator *aggregator; |
3c4c88a1 VF |
2076 | struct list_head *iter; |
2077 | struct slave *slave; | |
2078 | struct port *port; | |
1da177e4 | 2079 | |
1f2cd845 | 2080 | read_lock(&bond->lock); |
be79bd04 | 2081 | rcu_read_lock(); |
1f2cd845 | 2082 | |
be79bd04 | 2083 | /* check if there are any slaves */ |
0965a1f3 | 2084 | if (!bond_has_slaves(bond)) |
1da177e4 | 2085 | goto re_arm; |
1da177e4 | 2086 | |
be79bd04 | 2087 | /* check if agg_select_timer timer after initialize is timed out */ |
1da177e4 | 2088 | if (BOND_AD_INFO(bond).agg_select_timer && !(--BOND_AD_INFO(bond).agg_select_timer)) { |
be79bd04 | 2089 | slave = bond_first_slave_rcu(bond); |
fe9323da VF |
2090 | port = slave ? &(SLAVE_AD_INFO(slave).port) : NULL; |
2091 | ||
be79bd04 | 2092 | /* select the active aggregator for the bond */ |
fe9323da | 2093 | if (port) { |
1da177e4 | 2094 | if (!port->slave) { |
a4aee5c8 JP |
2095 | pr_warning("%s: Warning: bond's first port is uninitialized\n", |
2096 | bond->dev->name); | |
1da177e4 LT |
2097 | goto re_arm; |
2098 | } | |
2099 | ||
2100 | aggregator = __get_first_agg(port); | |
2101 | ad_agg_selection_logic(aggregator); | |
2102 | } | |
f0c76d61 | 2103 | bond_3ad_set_carrier(bond); |
1da177e4 LT |
2104 | } |
2105 | ||
be79bd04 | 2106 | /* for each port run the state machines */ |
2107 | bond_for_each_slave_rcu(bond, slave, iter) { | |
3c4c88a1 | 2108 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 | 2109 | if (!port->slave) { |
a4aee5c8 JP |
2110 | pr_warning("%s: Warning: Found an uninitialized port\n", |
2111 | bond->dev->name); | |
1da177e4 LT |
2112 | goto re_arm; |
2113 | } | |
2114 | ||
16d79d7d NC |
2115 | /* Lock around state machines to protect data accessed |
2116 | * by all (e.g., port->sm_vars). ad_rx_machine may run | |
2117 | * concurrently due to incoming LACPDU. | |
2118 | */ | |
9ac3524a | 2119 | __get_state_machine_lock(port); |
16d79d7d | 2120 | |
1da177e4 LT |
2121 | ad_rx_machine(NULL, port); |
2122 | ad_periodic_machine(port); | |
2123 | ad_port_selection_logic(port); | |
2124 | ad_mux_machine(port); | |
2125 | ad_tx_machine(port); | |
2126 | ||
be79bd04 | 2127 | /* turn off the BEGIN bit, since we already handled it */ |
7bfc4753 | 2128 | if (port->sm_vars & AD_PORT_BEGIN) |
1da177e4 | 2129 | port->sm_vars &= ~AD_PORT_BEGIN; |
16d79d7d | 2130 | |
9ac3524a | 2131 | __release_state_machine_lock(port); |
1da177e4 LT |
2132 | } |
2133 | ||
2134 | re_arm: | |
be79bd04 | 2135 | rcu_read_unlock(); |
1f2cd845 | 2136 | read_unlock(&bond->lock); |
be79bd04 | 2137 | queue_delayed_work(bond->wq, &bond->ad_work, ad_delta_in_ticks); |
1da177e4 LT |
2138 | } |
2139 | ||
2140 | /** | |
2141 | * bond_3ad_rx_indication - handle a received frame | |
2142 | * @lacpdu: received lacpdu | |
2143 | * @slave: slave struct to work on | |
2144 | * @length: length of the data received | |
2145 | * | |
2146 | * It is assumed that frames that were sent on this NIC don't returned as new | |
2147 | * received frames (loopback). Since only the payload is given to this | |
2148 | * function, it check for loopback. | |
2149 | */ | |
13a8e0c8 | 2150 | static int bond_3ad_rx_indication(struct lacpdu *lacpdu, struct slave *slave, u16 length) |
1da177e4 LT |
2151 | { |
2152 | struct port *port; | |
13a8e0c8 | 2153 | int ret = RX_HANDLER_ANOTHER; |
1da177e4 LT |
2154 | |
2155 | if (length >= sizeof(struct lacpdu)) { | |
2156 | ||
2157 | port = &(SLAVE_AD_INFO(slave).port); | |
2158 | ||
2159 | if (!port->slave) { | |
a4aee5c8 | 2160 | pr_warning("%s: Warning: port of slave %s is uninitialized\n", |
471cb5a3 | 2161 | slave->dev->name, slave->bond->dev->name); |
13a8e0c8 | 2162 | return ret; |
1da177e4 LT |
2163 | } |
2164 | ||
2165 | switch (lacpdu->subtype) { | |
2166 | case AD_TYPE_LACPDU: | |
13a8e0c8 | 2167 | ret = RX_HANDLER_CONSUMED; |
a4aee5c8 JP |
2168 | pr_debug("Received LACPDU on port %d\n", |
2169 | port->actor_port_number); | |
16d79d7d | 2170 | /* Protect against concurrent state machines */ |
9ac3524a | 2171 | __get_state_machine_lock(port); |
1da177e4 | 2172 | ad_rx_machine(lacpdu, port); |
9ac3524a | 2173 | __release_state_machine_lock(port); |
1da177e4 LT |
2174 | break; |
2175 | ||
2176 | case AD_TYPE_MARKER: | |
13a8e0c8 | 2177 | ret = RX_HANDLER_CONSUMED; |
1da177e4 LT |
2178 | // No need to convert fields to Little Endian since we don't use the marker's fields. |
2179 | ||
1c3f0b8e | 2180 | switch (((struct bond_marker *)lacpdu)->tlv_type) { |
1da177e4 | 2181 | case AD_MARKER_INFORMATION_SUBTYPE: |
a4aee5c8 JP |
2182 | pr_debug("Received Marker Information on port %d\n", |
2183 | port->actor_port_number); | |
1c3f0b8e | 2184 | ad_marker_info_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2185 | break; |
2186 | ||
2187 | case AD_MARKER_RESPONSE_SUBTYPE: | |
a4aee5c8 JP |
2188 | pr_debug("Received Marker Response on port %d\n", |
2189 | port->actor_port_number); | |
1c3f0b8e | 2190 | ad_marker_response_received((struct bond_marker *)lacpdu, port); |
1da177e4 LT |
2191 | break; |
2192 | ||
2193 | default: | |
a4aee5c8 JP |
2194 | pr_debug("Received an unknown Marker subtype on slot %d\n", |
2195 | port->actor_port_number); | |
1da177e4 LT |
2196 | } |
2197 | } | |
2198 | } | |
13a8e0c8 | 2199 | return ret; |
1da177e4 LT |
2200 | } |
2201 | ||
2202 | /** | |
2203 | * bond_3ad_adapter_speed_changed - handle a slave's speed change indication | |
2204 | * @slave: slave struct to work on | |
2205 | * | |
2206 | * Handle reselection of aggregator (if needed) for this port. | |
2207 | */ | |
2208 | void bond_3ad_adapter_speed_changed(struct slave *slave) | |
2209 | { | |
2210 | struct port *port; | |
2211 | ||
2212 | port = &(SLAVE_AD_INFO(slave).port); | |
2213 | ||
2214 | // if slave is null, the whole port is not initialized | |
2215 | if (!port->slave) { | |
a4aee5c8 | 2216 | pr_warning("Warning: %s: speed changed for uninitialized port on %s\n", |
471cb5a3 | 2217 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2218 | return; |
2219 | } | |
2220 | ||
2221 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; | |
128ea6c3 BD |
2222 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2223 | (__get_link_speed(port) << 1); | |
5a03cdb7 | 2224 | pr_debug("Port %d changed speed\n", port->actor_port_number); |
1da177e4 LT |
2225 | // there is no need to reselect a new aggregator, just signal the |
2226 | // state machines to reinitialize | |
2227 | port->sm_vars |= AD_PORT_BEGIN; | |
2228 | } | |
2229 | ||
2230 | /** | |
2231 | * bond_3ad_adapter_duplex_changed - handle a slave's duplex change indication | |
2232 | * @slave: slave struct to work on | |
2233 | * | |
2234 | * Handle reselection of aggregator (if needed) for this port. | |
2235 | */ | |
2236 | void bond_3ad_adapter_duplex_changed(struct slave *slave) | |
2237 | { | |
2238 | struct port *port; | |
2239 | ||
128ea6c3 | 2240 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2241 | |
2242 | // if slave is null, the whole port is not initialized | |
2243 | if (!port->slave) { | |
a4aee5c8 | 2244 | pr_warning("%s: Warning: duplex changed for uninitialized port on %s\n", |
471cb5a3 | 2245 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2246 | return; |
2247 | } | |
2248 | ||
2249 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; | |
128ea6c3 BD |
2250 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2251 | __get_duplex(port); | |
5a03cdb7 | 2252 | pr_debug("Port %d changed duplex\n", port->actor_port_number); |
1da177e4 LT |
2253 | // there is no need to reselect a new aggregator, just signal the |
2254 | // state machines to reinitialize | |
2255 | port->sm_vars |= AD_PORT_BEGIN; | |
2256 | } | |
2257 | ||
2258 | /** | |
2259 | * bond_3ad_handle_link_change - handle a slave's link status change indication | |
2260 | * @slave: slave struct to work on | |
2261 | * @status: whether the link is now up or down | |
2262 | * | |
2263 | * Handle reselection of aggregator (if needed) for this port. | |
2264 | */ | |
2265 | void bond_3ad_handle_link_change(struct slave *slave, char link) | |
2266 | { | |
2267 | struct port *port; | |
2268 | ||
2269 | port = &(SLAVE_AD_INFO(slave).port); | |
2270 | ||
2271 | // if slave is null, the whole port is not initialized | |
2272 | if (!port->slave) { | |
a4aee5c8 | 2273 | pr_warning("Warning: %s: link status changed for uninitialized port on %s\n", |
471cb5a3 | 2274 | slave->bond->dev->name, slave->dev->name); |
1da177e4 LT |
2275 | return; |
2276 | } | |
2277 | ||
2278 | // on link down we are zeroing duplex and speed since some of the adaptors(ce1000.lan) report full duplex/speed instead of N/A(duplex) / 0(speed) | |
2279 | // on link up we are forcing recheck on the duplex and speed since some of he adaptors(ce1000.lan) report | |
2280 | if (link == BOND_LINK_UP) { | |
f48127b6 | 2281 | port->is_enabled = true; |
1da177e4 | 2282 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2283 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2284 | __get_duplex(port); | |
1da177e4 | 2285 | port->actor_admin_port_key &= ~AD_SPEED_KEY_BITS; |
128ea6c3 BD |
2286 | port->actor_oper_port_key = port->actor_admin_port_key |= |
2287 | (__get_link_speed(port) << 1); | |
1da177e4 LT |
2288 | } else { |
2289 | /* link has failed */ | |
f48127b6 | 2290 | port->is_enabled = false; |
1da177e4 | 2291 | port->actor_admin_port_key &= ~AD_DUPLEX_KEY_BITS; |
128ea6c3 BD |
2292 | port->actor_oper_port_key = (port->actor_admin_port_key &= |
2293 | ~AD_SPEED_KEY_BITS); | |
1da177e4 LT |
2294 | } |
2295 | //BOND_PRINT_DBG(("Port %d changed link status to %s", port->actor_port_number, ((link == BOND_LINK_UP)?"UP":"DOWN"))); | |
2296 | // there is no need to reselect a new aggregator, just signal the | |
2297 | // state machines to reinitialize | |
2298 | port->sm_vars |= AD_PORT_BEGIN; | |
2299 | } | |
2300 | ||
ff59c456 | 2301 | /* |
a361c83c | 2302 | * set link state for bonding master: if we have an active |
ff59c456 JV |
2303 | * aggregator, we're up, if not, we're down. Presumes that we cannot |
2304 | * have an active aggregator if there are no slaves with link up. | |
2305 | * | |
031ae4de JV |
2306 | * This behavior complies with IEEE 802.3 section 43.3.9. |
2307 | * | |
ff59c456 JV |
2308 | * Called by bond_set_carrier(). Return zero if carrier state does not |
2309 | * change, nonzero if it does. | |
2310 | */ | |
2311 | int bond_3ad_set_carrier(struct bonding *bond) | |
2312 | { | |
655f8919 | 2313 | struct aggregator *active; |
dec1e90e | 2314 | struct slave *first_slave; |
655f8919 | 2315 | |
be79bd04 | 2316 | rcu_read_lock(); |
2317 | first_slave = bond_first_slave_rcu(bond); | |
2318 | rcu_read_unlock(); | |
dec1e90e | 2319 | if (!first_slave) |
2320 | return 0; | |
2321 | active = __get_active_agg(&(SLAVE_AD_INFO(first_slave).aggregator)); | |
655f8919 | 2322 | if (active) { |
2323 | /* are enough slaves available to consider link up? */ | |
2324 | if (active->num_of_ports < bond->params.min_links) { | |
2325 | if (netif_carrier_ok(bond->dev)) { | |
2326 | netif_carrier_off(bond->dev); | |
2327 | return 1; | |
2328 | } | |
2329 | } else if (!netif_carrier_ok(bond->dev)) { | |
ff59c456 JV |
2330 | netif_carrier_on(bond->dev); |
2331 | return 1; | |
2332 | } | |
2333 | return 0; | |
2334 | } | |
2335 | ||
2336 | if (netif_carrier_ok(bond->dev)) { | |
2337 | netif_carrier_off(bond->dev); | |
2338 | return 1; | |
2339 | } | |
2340 | return 0; | |
2341 | } | |
2342 | ||
1da177e4 | 2343 | /** |
318debd8 | 2344 | * __bond_3ad_get_active_agg_info - get information of the active aggregator |
1da177e4 LT |
2345 | * @bond: bonding struct to work on |
2346 | * @ad_info: ad_info struct to fill with the bond's info | |
2347 | * | |
2348 | * Returns: 0 on success | |
2349 | * < 0 on error | |
2350 | */ | |
318debd8 | 2351 | int __bond_3ad_get_active_agg_info(struct bonding *bond, |
2352 | struct ad_info *ad_info) | |
1da177e4 LT |
2353 | { |
2354 | struct aggregator *aggregator = NULL; | |
3c4c88a1 VF |
2355 | struct list_head *iter; |
2356 | struct slave *slave; | |
1da177e4 LT |
2357 | struct port *port; |
2358 | ||
47e91f56 | 2359 | bond_for_each_slave_rcu(bond, slave, iter) { |
3c4c88a1 | 2360 | port = &(SLAVE_AD_INFO(slave).port); |
1da177e4 LT |
2361 | if (port->aggregator && port->aggregator->is_active) { |
2362 | aggregator = port->aggregator; | |
2363 | break; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | if (aggregator) { | |
2368 | ad_info->aggregator_id = aggregator->aggregator_identifier; | |
2369 | ad_info->ports = aggregator->num_of_ports; | |
2370 | ad_info->actor_key = aggregator->actor_oper_aggregator_key; | |
2371 | ad_info->partner_key = aggregator->partner_oper_aggregator_key; | |
2372 | memcpy(ad_info->partner_system, aggregator->partner_system.mac_addr_value, ETH_ALEN); | |
2373 | return 0; | |
2374 | } | |
2375 | ||
2376 | return -1; | |
2377 | } | |
2378 | ||
318debd8 | 2379 | /* Wrapper used to hold bond->lock so no slave manipulation can occur */ |
2380 | int bond_3ad_get_active_agg_info(struct bonding *bond, struct ad_info *ad_info) | |
2381 | { | |
2382 | int ret; | |
2383 | ||
47e91f56 | 2384 | rcu_read_lock(); |
318debd8 | 2385 | ret = __bond_3ad_get_active_agg_info(bond, ad_info); |
47e91f56 | 2386 | rcu_read_unlock(); |
318debd8 | 2387 | |
2388 | return ret; | |
2389 | } | |
2390 | ||
1da177e4 LT |
2391 | int bond_3ad_xmit_xor(struct sk_buff *skb, struct net_device *dev) |
2392 | { | |
454d7c9b | 2393 | struct bonding *bond = netdev_priv(dev); |
c33d7887 VF |
2394 | struct slave *slave, *first_ok_slave; |
2395 | struct aggregator *agg; | |
2396 | struct ad_info ad_info; | |
9caff1e7 | 2397 | struct list_head *iter; |
1da177e4 | 2398 | int slaves_in_agg; |
c33d7887 | 2399 | int slave_agg_no; |
1da177e4 | 2400 | int res = 1; |
c33d7887 | 2401 | int agg_id; |
1da177e4 | 2402 | |
318debd8 | 2403 | if (__bond_3ad_get_active_agg_info(bond, &ad_info)) { |
2404 | pr_debug("%s: Error: __bond_3ad_get_active_agg_info failed\n", | |
a4aee5c8 | 2405 | dev->name); |
1da177e4 LT |
2406 | goto out; |
2407 | } | |
2408 | ||
2409 | slaves_in_agg = ad_info.ports; | |
2410 | agg_id = ad_info.aggregator_id; | |
2411 | ||
2412 | if (slaves_in_agg == 0) { | |
a4aee5c8 | 2413 | pr_debug("%s: Error: active aggregator is empty\n", dev->name); |
1da177e4 LT |
2414 | goto out; |
2415 | } | |
2416 | ||
32819dc1 | 2417 | slave_agg_no = bond_xmit_hash(bond, skb, slaves_in_agg); |
c33d7887 | 2418 | first_ok_slave = NULL; |
1da177e4 | 2419 | |
47e91f56 | 2420 | bond_for_each_slave_rcu(bond, slave, iter) { |
c33d7887 VF |
2421 | agg = SLAVE_AD_INFO(slave).port.aggregator; |
2422 | if (!agg || agg->aggregator_identifier != agg_id) | |
2423 | continue; | |
1da177e4 | 2424 | |
c33d7887 VF |
2425 | if (slave_agg_no >= 0) { |
2426 | if (!first_ok_slave && SLAVE_IS_OK(slave)) | |
2427 | first_ok_slave = slave; | |
1da177e4 | 2428 | slave_agg_no--; |
c33d7887 VF |
2429 | continue; |
2430 | } | |
2431 | ||
2432 | if (SLAVE_IS_OK(slave)) { | |
2433 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
2434 | goto out; | |
1da177e4 LT |
2435 | } |
2436 | } | |
2437 | ||
2438 | if (slave_agg_no >= 0) { | |
a4aee5c8 JP |
2439 | pr_err("%s: Error: Couldn't find a slave to tx on for aggregator ID %d\n", |
2440 | dev->name, agg_id); | |
1da177e4 LT |
2441 | goto out; |
2442 | } | |
2443 | ||
c33d7887 VF |
2444 | /* we couldn't find any suitable slave after the agg_no, so use the |
2445 | * first suitable found, if found. */ | |
2446 | if (first_ok_slave) | |
2447 | res = bond_dev_queue_xmit(bond, skb, first_ok_slave->dev); | |
1da177e4 LT |
2448 | |
2449 | out: | |
2450 | if (res) { | |
2451 | /* no suitable interface, frame not sent */ | |
04502430 | 2452 | kfree_skb(skb); |
1da177e4 | 2453 | } |
0693e88e | 2454 | |
ec634fe3 | 2455 | return NETDEV_TX_OK; |
1da177e4 LT |
2456 | } |
2457 | ||
de063b70 ED |
2458 | int bond_3ad_lacpdu_recv(const struct sk_buff *skb, struct bonding *bond, |
2459 | struct slave *slave) | |
1da177e4 | 2460 | { |
13a8e0c8 | 2461 | int ret = RX_HANDLER_ANOTHER; |
de063b70 ED |
2462 | struct lacpdu *lacpdu, _lacpdu; |
2463 | ||
3aba891d | 2464 | if (skb->protocol != PKT_TYPE_LACPDU) |
13a8e0c8 | 2465 | return ret; |
b3053251 | 2466 | |
de063b70 ED |
2467 | lacpdu = skb_header_pointer(skb, 0, sizeof(_lacpdu), &_lacpdu); |
2468 | if (!lacpdu) | |
13a8e0c8 | 2469 | return ret; |
ab12811c | 2470 | |
1da177e4 | 2471 | read_lock(&bond->lock); |
de063b70 | 2472 | ret = bond_3ad_rx_indication(lacpdu, slave, skb->len); |
1da177e4 | 2473 | read_unlock(&bond->lock); |
13a8e0c8 | 2474 | return ret; |
1da177e4 | 2475 | } |
ba824a8b PP |
2476 | |
2477 | /* | |
2478 | * When modify lacp_rate parameter via sysfs, | |
2479 | * update actor_oper_port_state of each port. | |
2480 | * | |
2481 | * Hold slave->state_machine_lock, | |
2482 | * so we can modify port->actor_oper_port_state, | |
2483 | * no matter bond is up or down. | |
2484 | */ | |
2485 | void bond_3ad_update_lacp_rate(struct bonding *bond) | |
2486 | { | |
ba824a8b | 2487 | struct port *port = NULL; |
9caff1e7 | 2488 | struct list_head *iter; |
c509316b | 2489 | struct slave *slave; |
ba824a8b PP |
2490 | int lacp_fast; |
2491 | ||
ba824a8b | 2492 | lacp_fast = bond->params.lacp_fast; |
9caff1e7 | 2493 | bond_for_each_slave(bond, slave, iter) { |
ba824a8b PP |
2494 | port = &(SLAVE_AD_INFO(slave).port); |
2495 | __get_state_machine_lock(port); | |
2496 | if (lacp_fast) | |
2497 | port->actor_oper_port_state |= AD_STATE_LACP_TIMEOUT; | |
2498 | else | |
2499 | port->actor_oper_port_state &= ~AD_STATE_LACP_TIMEOUT; | |
2500 | __release_state_machine_lock(port); | |
2501 | } | |
ba824a8b | 2502 | } |