1 /* $NetBSD: ieee8023ad_impl.h,v 1.2 2005/12/10 23:21:39 elad Exp $
2 * $FreeBSD: head/sys/net/ieee8023ad_lacp.h 253687 2013-07-26 19:41:13Z adrian $
3 */
4
5 /*-
6 * Copyright (c)2005 YAMAMOTO Takashi,
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 */
31
32 /*
33 * IEEE802.3ad LACP
34 *
35 * implementation details.
36 */
37
38 #define LACP_TIMER_CURRENT_WHILE 0
39 #define LACP_TIMER_PERIODIC 1
40 #define LACP_TIMER_WAIT_WHILE 2
41 #define LACP_NTIMER 3
42
43 #define LACP_TIMER_ARM(port, timer, val) \
44 (port)->lp_timer[(timer)] = (val)
45 #define LACP_TIMER_DISARM(port, timer) \
46 (port)->lp_timer[(timer)] = 0
47 #define LACP_TIMER_ISARMED(port, timer) \
48 ((port)->lp_timer[(timer)] > 0)
49
50 /*
51 * IEEE802.3ad LACP
52 *
53 * protocol definitions.
54 */
55
56 #define LACP_STATE_ACTIVITY (1<<0)
57 #define LACP_STATE_TIMEOUT (1<<1)
58 #define LACP_STATE_AGGREGATION (1<<2)
59 #define LACP_STATE_SYNC (1<<3)
60 #define LACP_STATE_COLLECTING (1<<4)
61 #define LACP_STATE_DISTRIBUTING (1<<5)
62 #define LACP_STATE_DEFAULTED (1<<6)
63 #define LACP_STATE_EXPIRED (1<<7)
64
65 #define LACP_PORT_NTT 0x00000001
66 #define LACP_PORT_MARK 0x00000002
67
68 #define LACP_STATE_BITS \
69 "\020" \
70 "\001ACTIVITY" \
71 "\002TIMEOUT" \
72 "\003AGGREGATION" \
73 "\004SYNC" \
74 "\005COLLECTING" \
75 "\006DISTRIBUTING" \
76 "\007DEFAULTED" \
77 "\010EXPIRED"
78
79 /*
80 * IEEE802.3 slow protocols
81 *
82 * protocol (on-wire) definitions.
83 *
84 * XXX should be elsewhere.
85 */
86
87 #define SLOWPROTOCOLS_SUBTYPE_LACP 1
88 #define SLOWPROTOCOLS_SUBTYPE_MARKER 2
89
90 struct slowprothdr {
91 uint8_t sph_subtype;
92 uint8_t sph_version;
93 } __packed;
94
95 /*
96 * TLV on-wire structure.
97 */
98
99 struct tlvhdr {
100 uint8_t tlv_type;
101 uint8_t tlv_length;
102 /* uint8_t tlv_value[]; */
103 } __packed;
104
105 /*
106 * ... and our implementation.
107 */
108
109 #define TLV_SET(tlv, type, length) \
110 do { \
111 (tlv)->tlv_type = (type); \
112 (tlv)->tlv_length = sizeof(*tlv) + (length); \
113 } while (/*CONSTCOND*/0)
114
115 struct tlv_template {
116 uint8_t tmpl_type;
117 uint8_t tmpl_length;
118 };
119
120 struct lacp_systemid {
121 uint16_t lsi_prio;
122 uint8_t lsi_mac[6];
123 } __packed;
124
125 struct lacp_portid {
126 uint16_t lpi_prio;
127 uint16_t lpi_portno;
128 } __packed;
129
130 struct lacp_peerinfo {
131 struct lacp_systemid lip_systemid;
132 uint16_t lip_key;
133 struct lacp_portid lip_portid;
134 uint8_t lip_state;
135 uint8_t lip_resv[3];
136 } __packed;
137
138 struct lacp_collectorinfo {
139 uint16_t lci_maxdelay;
140 uint8_t lci_resv[12];
141 } __packed;
142
143 struct lacpdu {
144 struct ether_header ldu_eh;
145 struct slowprothdr ldu_sph;
146
147 struct tlvhdr ldu_tlv_actor;
148 struct lacp_peerinfo ldu_actor;
149 struct tlvhdr ldu_tlv_partner;
150 struct lacp_peerinfo ldu_partner;
151 struct tlvhdr ldu_tlv_collector;
152 struct lacp_collectorinfo ldu_collector;
153 struct tlvhdr ldu_tlv_term;
154 uint8_t ldu_resv[50];
155 } __packed;
156
157 /*
158 * IEEE802.3ad marker protocol
159 *
160 * protocol (on-wire) definitions.
161 */
162 struct lacp_markerinfo {
163 uint16_t mi_rq_port;
164 uint8_t mi_rq_system[ETHER_ADDR_LEN];
165 uint32_t mi_rq_xid;
166 uint8_t mi_pad[2];
167 } __packed;
168
169 struct markerdu {
170 struct ether_header mdu_eh;
171 struct slowprothdr mdu_sph;
172
173 struct tlvhdr mdu_tlv;
174 struct lacp_markerinfo mdu_info;
175 struct tlvhdr mdu_tlv_term;
176 uint8_t mdu_resv[90];
177 } __packed;
178
179 #define MARKER_TYPE_INFO 0x01
180 #define MARKER_TYPE_RESPONSE 0x02
181
182 enum lacp_selected {
183 LACP_UNSELECTED,
184 LACP_STANDBY, /* not used in this implementation */
185 LACP_SELECTED,
186 };
187
188 enum lacp_mux_state {
189 LACP_MUX_DETACHED,
190 LACP_MUX_WAITING,
191 LACP_MUX_ATTACHED,
192 LACP_MUX_COLLECTING,
193 LACP_MUX_DISTRIBUTING,
194 };
195
196 #define LACP_MAX_PORTS 32
197
198 struct lacp_portmap {
199 int pm_count;
200 struct lacp_port *pm_map[LACP_MAX_PORTS];
201 };
202
203 struct lacp_port {
204 TAILQ_ENTRY(lacp_port) lp_dist_q;
205 LIST_ENTRY(lacp_port) lp_next;
206 struct lacp_softc *lp_lsc;
207 struct lagg_port *lp_lagg;
208 struct ifnet *lp_ifp;
209 struct lacp_peerinfo lp_partner;
210 struct lacp_peerinfo lp_actor;
211 struct lacp_markerinfo lp_marker;
212 #define lp_state lp_actor.lip_state
213 #define lp_key lp_actor.lip_key
214 #define lp_systemid lp_actor.lip_systemid
215 struct timeval lp_last_lacpdu;
216 int lp_lacpdu_sent;
217 enum lacp_mux_state lp_mux_state;
218 enum lacp_selected lp_selected;
219 int lp_flags;
220 u_int lp_media; /* XXX redundant */
221 int lp_timer[LACP_NTIMER];
222 struct ifmultiaddr *lp_ifma;
223
224 struct lacp_aggregator *lp_aggregator;
225 };
226
227 struct lacp_aggregator {
228 TAILQ_ENTRY(lacp_aggregator) la_q;
229 int la_refcnt; /* num of ports which selected us */
230 int la_nports; /* num of distributing ports */
231 TAILQ_HEAD(, lacp_port) la_ports; /* distributing ports */
232 struct lacp_peerinfo la_partner;
233 struct lacp_peerinfo la_actor;
234 int la_pending; /* number of ports in wait_while */
235 };
236
237 struct lacp_softc {
238 struct lagg_softc *lsc_softc;
239 struct lock lsc_lock;
240 struct lacp_aggregator *lsc_active_aggregator;
241 TAILQ_HEAD(, lacp_aggregator) lsc_aggregators;
242 boolean_t lsc_suppress_distributing;
243 struct callout lsc_transit_callout;
244 struct callout lsc_callout;
245 LIST_HEAD(, lacp_port) lsc_ports;
246 struct lacp_portmap lsc_pmap[2];
247 volatile u_int lsc_activemap;
248 u_int32_t lsc_hashkey;
249 struct {
250 u_int32_t lsc_rx_test;
251 u_int32_t lsc_tx_test;
252 } lsc_debug;
253 u_int32_t lsc_strict_mode;
254 };
255
256 #define LACP_TYPE_ACTORINFO 1
257 #define LACP_TYPE_PARTNERINFO 2
258 #define LACP_TYPE_COLLECTORINFO 3
259
260 /* timeout values (in sec) */
261 #define LACP_FAST_PERIODIC_TIME (1)
262 #define LACP_SLOW_PERIODIC_TIME (30)
263 #define LACP_SHORT_TIMEOUT_TIME (3 * LACP_FAST_PERIODIC_TIME)
264 #define LACP_LONG_TIMEOUT_TIME (3 * LACP_SLOW_PERIODIC_TIME)
265 #define LACP_CHURN_DETECTION_TIME (60)
266 #define LACP_AGGREGATE_WAIT_TIME (2)
267 #define LACP_TRANSIT_DELAY 3000 /* in msec */
268
269 #define LACP_STATE_EQ(s1, s2, mask) \
270 ((((s1) ^ (s2)) & (mask)) == 0)
271
272 #define LACP_SYS_PRI(peer) (peer).lip_systemid.lsi_prio
273
274 #define LACP_PORT(_lp) ((struct lacp_port *)(_lp)->lp_psc)
275 #define LACP_SOFTC(_sc) ((struct lacp_softc *)(_sc)->sc_psc)
276
277 #define LACP_LOCK_INIT(_lsc) lockinit(&(_lsc)->lsc_lock, \
278 "lacp mtx", 0, 0)
279 #define LACP_LOCK_DESTROY(_lsc) lockuninit(&(_lsc)->lsc_lock)
280 #define LACP_LOCK(_lsc) lockmgr(&(_lsc)->lsc_lock, LK_EXCLUSIVE)
281 #define LACP_UNLOCK(_lsc) lockmgr(&(_lsc)->lsc_lock, LK_RELEASE)
282 #define LACP_LOCK_ASSERT(_lsc) KKASSERT(lockstatus(&(_lsc)->lsc_lock, curthread)==LK_EXCLUSIVE)
283
284 struct mbuf *lacp_input(struct lagg_port *, struct mbuf *);
285 struct lagg_port *lacp_select_tx_port(struct lagg_softc *, struct mbuf *);
286 int lacp_attach(struct lagg_softc *);
287 int lacp_detach(struct lagg_softc *);
288 void lacp_init(struct lagg_softc *);
289 void lacp_stop(struct lagg_softc *);
290 int lacp_port_create(struct lagg_port *);
291 void lacp_port_destroy(struct lagg_port *);
292 void lacp_linkstate(struct lagg_port *);
293 void lacp_req(struct lagg_softc *, caddr_t);
294 void lacp_portreq(struct lagg_port *, caddr_t);
295
296 static __inline int
lacp_isactive(struct lagg_port * lgp)297 lacp_isactive(struct lagg_port *lgp)
298 {
299 struct lacp_port *lp = LACP_PORT(lgp);
300 struct lacp_softc *lsc = lp->lp_lsc;
301 struct lacp_aggregator *la = lp->lp_aggregator;
302
303 /* This port is joined to the active aggregator */
304 if (la != NULL && la == lsc->lsc_active_aggregator)
305 return (1);
306
307 return (0);
308 }
309
310 static __inline int
lacp_iscollecting(struct lagg_port * lgp)311 lacp_iscollecting(struct lagg_port *lgp)
312 {
313 struct lacp_port *lp = LACP_PORT(lgp);
314
315 return ((lp->lp_state & LACP_STATE_COLLECTING) != 0);
316 }
317
318 static __inline int
lacp_isdistributing(struct lagg_port * lgp)319 lacp_isdistributing(struct lagg_port *lgp)
320 {
321 struct lacp_port *lp = LACP_PORT(lgp);
322
323 return ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0);
324 }
325
326 /* following constants don't include terminating NUL */
327 #define LACP_MACSTR_MAX (2*6 + 5)
328 #define LACP_SYSTEMPRIOSTR_MAX (4)
329 #define LACP_SYSTEMIDSTR_MAX (LACP_SYSTEMPRIOSTR_MAX + 1 + LACP_MACSTR_MAX)
330 #define LACP_PORTPRIOSTR_MAX (4)
331 #define LACP_PORTNOSTR_MAX (4)
332 #define LACP_PORTIDSTR_MAX (LACP_PORTPRIOSTR_MAX + 1 + LACP_PORTNOSTR_MAX)
333 #define LACP_KEYSTR_MAX (4)
334 #define LACP_PARTNERSTR_MAX \
335 (1 + LACP_SYSTEMIDSTR_MAX + 1 + LACP_KEYSTR_MAX + 1 \
336 + LACP_PORTIDSTR_MAX + 1)
337 #define LACP_LAGIDSTR_MAX \
338 (1 + LACP_PARTNERSTR_MAX + 1 + LACP_PARTNERSTR_MAX + 1)
339 #define LACP_STATESTR_MAX (255) /* XXX */
340