1 /* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */
2
3 /*
4 * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
5 * Copyright (c) 2007 Andrew Thompson <thompsa@FreeBSD.org>
6 * Copyright (c) 2014, 2016 Marcelo Araujo <araujo@FreeBSD.org>
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21 #include "opt_inet.h"
22 #include "opt_inet6.h"
23 #include "opt_kern_tls.h"
24 #include "opt_ratelimit.h"
25
26 #include <sys/param.h>
27 #include <sys/kernel.h>
28 #include <sys/malloc.h>
29 #include <sys/mbuf.h>
30 #include <sys/queue.h>
31 #include <sys/socket.h>
32 #include <sys/sockio.h>
33 #include <sys/sysctl.h>
34 #include <sys/module.h>
35 #include <sys/priv.h>
36 #include <sys/systm.h>
37 #include <sys/proc.h>
38 #include <sys/lock.h>
39 #include <sys/rmlock.h>
40 #include <sys/sx.h>
41 #include <sys/taskqueue.h>
42 #include <sys/eventhandler.h>
43
44 #include <net/ethernet.h>
45 #include <net/if.h>
46 #include <net/if_clone.h>
47 #include <net/if_arp.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/if_var.h>
52 #include <net/if_private.h>
53 #include <net/bpf.h>
54 #include <net/route.h>
55 #include <net/vnet.h>
56 #include <net/infiniband.h>
57
58 #if defined(INET) || defined(INET6)
59 #include <netinet/in.h>
60 #include <netinet/ip.h>
61 #endif
62 #ifdef INET
63 #include <netinet/in_systm.h>
64 #include <netinet/if_ether.h>
65 #endif
66
67 #ifdef INET6
68 #include <netinet/ip6.h>
69 #include <netinet6/in6_var.h>
70 #include <netinet6/in6_ifattach.h>
71 #endif
72
73 #include <net/if_vlan_var.h>
74 #include <net/if_lagg.h>
75 #include <net/ieee8023ad_lacp.h>
76
77 #ifdef DEV_NETMAP
78 MODULE_DEPEND(if_lagg, netmap, 1, 1, 1);
79 #endif
80
81 #define LAGG_SX_INIT(_sc) sx_init(&(_sc)->sc_sx, "if_lagg sx")
82 #define LAGG_SX_DESTROY(_sc) sx_destroy(&(_sc)->sc_sx)
83 #define LAGG_XLOCK(_sc) sx_xlock(&(_sc)->sc_sx)
84 #define LAGG_XUNLOCK(_sc) sx_xunlock(&(_sc)->sc_sx)
85 #define LAGG_XLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_XLOCKED)
86 #define LAGG_SLOCK(_sc) sx_slock(&(_sc)->sc_sx)
87 #define LAGG_SUNLOCK(_sc) sx_sunlock(&(_sc)->sc_sx)
88 #define LAGG_SXLOCK_ASSERT(_sc) sx_assert(&(_sc)->sc_sx, SA_LOCKED)
89
90 /* Special flags we should propagate to the lagg ports. */
91 static struct {
92 int flag;
93 int (*func)(struct ifnet *, int);
94 } lagg_pflags[] = {
95 {IFF_PROMISC, ifpromisc},
96 {IFF_ALLMULTI, if_allmulti},
97 {0, NULL}
98 };
99
100 struct lagg_snd_tag {
101 struct m_snd_tag com;
102 struct m_snd_tag *tag;
103 };
104
105 VNET_DEFINE_STATIC(SLIST_HEAD(__trhead, lagg_softc), lagg_list); /* list of laggs */
106 #define V_lagg_list VNET(lagg_list)
107 VNET_DEFINE_STATIC(struct mtx, lagg_list_mtx);
108 #define V_lagg_list_mtx VNET(lagg_list_mtx)
109 #define LAGG_LIST_LOCK_INIT(x) mtx_init(&V_lagg_list_mtx, \
110 "if_lagg list", NULL, MTX_DEF)
111 #define LAGG_LIST_LOCK_DESTROY(x) mtx_destroy(&V_lagg_list_mtx)
112 #define LAGG_LIST_LOCK(x) mtx_lock(&V_lagg_list_mtx)
113 #define LAGG_LIST_UNLOCK(x) mtx_unlock(&V_lagg_list_mtx)
114 static eventhandler_tag lagg_detach_cookie = NULL;
115
116 static int lagg_clone_create(struct if_clone *, char *, size_t,
117 struct ifc_data *, struct ifnet **);
118 static int lagg_clone_destroy(struct if_clone *, struct ifnet *, uint32_t);
119 VNET_DEFINE_STATIC(struct if_clone *, lagg_cloner);
120 #define V_lagg_cloner VNET(lagg_cloner)
121 static const char laggname[] = "lagg";
122 static MALLOC_DEFINE(M_LAGG, laggname, "802.3AD Link Aggregation Interface");
123
124 static void lagg_capabilities(struct lagg_softc *);
125 static int lagg_port_create(struct lagg_softc *, struct ifnet *);
126 static int lagg_port_destroy(struct lagg_port *, int);
127 static struct mbuf *lagg_input_ethernet(struct ifnet *, struct mbuf *);
128 static struct mbuf *lagg_input_infiniband(struct ifnet *, struct mbuf *);
129 static void lagg_linkstate(struct lagg_softc *);
130 static void lagg_port_state(struct ifnet *, int);
131 static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t);
132 static int lagg_port_output(struct ifnet *, struct mbuf *,
133 const struct sockaddr *, struct route *);
134 static void lagg_port_ifdetach(void *arg __unused, struct ifnet *);
135 #ifdef LAGG_PORT_STACKING
136 static int lagg_port_checkstacking(struct lagg_softc *);
137 #endif
138 static void lagg_port2req(struct lagg_port *, struct lagg_reqport *);
139 static void lagg_if_updown(struct lagg_softc *, bool);
140 static void lagg_init(void *);
141 static void lagg_stop(struct lagg_softc *);
142 static int lagg_ioctl(struct ifnet *, u_long, caddr_t);
143 #if defined(KERN_TLS) || defined(RATELIMIT)
144 static int lagg_snd_tag_alloc(struct ifnet *,
145 union if_snd_tag_alloc_params *,
146 struct m_snd_tag **);
147 static int lagg_snd_tag_modify(struct m_snd_tag *,
148 union if_snd_tag_modify_params *);
149 static int lagg_snd_tag_query(struct m_snd_tag *,
150 union if_snd_tag_query_params *);
151 static void lagg_snd_tag_free(struct m_snd_tag *);
152 static struct m_snd_tag *lagg_next_snd_tag(struct m_snd_tag *);
153 static void lagg_ratelimit_query(struct ifnet *,
154 struct if_ratelimit_query_results *);
155 #endif
156 static int lagg_setmulti(struct lagg_port *);
157 static int lagg_clrmulti(struct lagg_port *);
158 static void lagg_setcaps(struct lagg_port *, int cap, int cap2);
159 static int lagg_setflag(struct lagg_port *, int, int,
160 int (*func)(struct ifnet *, int));
161 static int lagg_setflags(struct lagg_port *, int status);
162 static uint64_t lagg_get_counter(struct ifnet *ifp, ift_counter cnt);
163 static int lagg_transmit_ethernet(struct ifnet *, struct mbuf *);
164 static int lagg_transmit_infiniband(struct ifnet *, struct mbuf *);
165 static void lagg_qflush(struct ifnet *);
166 static int lagg_media_change(struct ifnet *);
167 static void lagg_media_status(struct ifnet *, struct ifmediareq *);
168 static struct lagg_port *lagg_link_active(struct lagg_softc *,
169 struct lagg_port *);
170
171 /* Simple round robin */
172 static void lagg_rr_attach(struct lagg_softc *);
173 static int lagg_rr_start(struct lagg_softc *, struct mbuf *);
174
175 /* Active failover */
176 static int lagg_fail_start(struct lagg_softc *, struct mbuf *);
177 static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *,
178 struct mbuf *);
179
180 /* Loadbalancing */
181 static void lagg_lb_attach(struct lagg_softc *);
182 static void lagg_lb_detach(struct lagg_softc *);
183 static int lagg_lb_port_create(struct lagg_port *);
184 static void lagg_lb_port_destroy(struct lagg_port *);
185 static int lagg_lb_start(struct lagg_softc *, struct mbuf *);
186 static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *);
187
188 /* Broadcast */
189 static int lagg_bcast_start(struct lagg_softc *, struct mbuf *);
190
191 /* 802.3ad LACP */
192 static void lagg_lacp_attach(struct lagg_softc *);
193 static void lagg_lacp_detach(struct lagg_softc *);
194 static int lagg_lacp_start(struct lagg_softc *, struct mbuf *);
195 static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *,
196 struct mbuf *);
197 static void lagg_lacp_lladdr(struct lagg_softc *);
198
199 /* Default input */
200 static struct mbuf *lagg_default_input(struct lagg_softc *, struct lagg_port *,
201 struct mbuf *);
202
203 /* lagg protocol table */
204 static const struct lagg_proto {
205 lagg_proto pr_num;
206 void (*pr_attach)(struct lagg_softc *);
207 void (*pr_detach)(struct lagg_softc *);
208 int (*pr_start)(struct lagg_softc *, struct mbuf *);
209 struct mbuf * (*pr_input)(struct lagg_softc *, struct lagg_port *,
210 struct mbuf *);
211 int (*pr_addport)(struct lagg_port *);
212 void (*pr_delport)(struct lagg_port *);
213 void (*pr_linkstate)(struct lagg_port *);
214 void (*pr_init)(struct lagg_softc *);
215 void (*pr_stop)(struct lagg_softc *);
216 void (*pr_lladdr)(struct lagg_softc *);
217 void (*pr_request)(struct lagg_softc *, void *);
218 void (*pr_portreq)(struct lagg_port *, void *);
219 } lagg_protos[] = {
220 {
221 .pr_num = LAGG_PROTO_NONE
222 },
223 {
224 .pr_num = LAGG_PROTO_ROUNDROBIN,
225 .pr_attach = lagg_rr_attach,
226 .pr_start = lagg_rr_start,
227 .pr_input = lagg_default_input,
228 },
229 {
230 .pr_num = LAGG_PROTO_FAILOVER,
231 .pr_start = lagg_fail_start,
232 .pr_input = lagg_fail_input,
233 },
234 {
235 .pr_num = LAGG_PROTO_LOADBALANCE,
236 .pr_attach = lagg_lb_attach,
237 .pr_detach = lagg_lb_detach,
238 .pr_start = lagg_lb_start,
239 .pr_input = lagg_default_input,
240 .pr_addport = lagg_lb_port_create,
241 .pr_delport = lagg_lb_port_destroy,
242 },
243 {
244 .pr_num = LAGG_PROTO_LACP,
245 .pr_attach = lagg_lacp_attach,
246 .pr_detach = lagg_lacp_detach,
247 .pr_start = lagg_lacp_start,
248 .pr_input = lagg_lacp_input,
249 .pr_addport = lacp_port_create,
250 .pr_delport = lacp_port_destroy,
251 .pr_linkstate = lacp_linkstate,
252 .pr_init = lacp_init,
253 .pr_stop = lacp_stop,
254 .pr_lladdr = lagg_lacp_lladdr,
255 .pr_request = lacp_req,
256 .pr_portreq = lacp_portreq,
257 },
258 {
259 .pr_num = LAGG_PROTO_BROADCAST,
260 .pr_start = lagg_bcast_start,
261 .pr_input = lagg_default_input,
262 },
263 };
264
265 SYSCTL_DECL(_net_link);
266 SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
267 "Link Aggregation");
268
269 /* Allow input on any failover links */
270 VNET_DEFINE_STATIC(int, lagg_failover_rx_all);
271 #define V_lagg_failover_rx_all VNET(lagg_failover_rx_all)
272 SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW | CTLFLAG_VNET,
273 &VNET_NAME(lagg_failover_rx_all), 0,
274 "Accept input from any interface in a failover lagg");
275
276 /* Default value for using flowid */
277 VNET_DEFINE_STATIC(int, def_use_flowid) = 0;
278 #define V_def_use_flowid VNET(def_use_flowid)
279 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid,
280 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_flowid), 0,
281 "Default setting for using flow id for load sharing");
282
283 /* Default value for using numa */
284 VNET_DEFINE_STATIC(int, def_use_numa) = 1;
285 #define V_def_use_numa VNET(def_use_numa)
286 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_numa,
287 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_use_numa), 0,
288 "Use numa to steer flows");
289
290 /* Default value for flowid shift */
291 VNET_DEFINE_STATIC(int, def_flowid_shift) = 16;
292 #define V_def_flowid_shift VNET(def_flowid_shift)
293 SYSCTL_INT(_net_link_lagg, OID_AUTO, default_flowid_shift,
294 CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(def_flowid_shift), 0,
295 "Default setting for flowid shift for load sharing");
296
297 static void
vnet_lagg_init(const void * unused __unused)298 vnet_lagg_init(const void *unused __unused)
299 {
300
301 LAGG_LIST_LOCK_INIT();
302 SLIST_INIT(&V_lagg_list);
303 struct if_clone_addreq req = {
304 .create_f = lagg_clone_create,
305 .destroy_f = lagg_clone_destroy,
306 .flags = IFC_F_AUTOUNIT,
307 };
308 V_lagg_cloner = ifc_attach_cloner(laggname, &req);
309 }
310 VNET_SYSINIT(vnet_lagg_init, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY,
311 vnet_lagg_init, NULL);
312
313 static void
vnet_lagg_uninit(const void * unused __unused)314 vnet_lagg_uninit(const void *unused __unused)
315 {
316
317 ifc_detach_cloner(V_lagg_cloner);
318 LAGG_LIST_LOCK_DESTROY();
319 }
320 VNET_SYSUNINIT(vnet_lagg_uninit, SI_SUB_INIT_IF, SI_ORDER_ANY,
321 vnet_lagg_uninit, NULL);
322
323 static int
lagg_modevent(module_t mod,int type,void * data)324 lagg_modevent(module_t mod, int type, void *data)
325 {
326
327 switch (type) {
328 case MOD_LOAD:
329 lagg_input_ethernet_p = lagg_input_ethernet;
330 lagg_input_infiniband_p = lagg_input_infiniband;
331 lagg_linkstate_p = lagg_port_state;
332 lagg_detach_cookie = EVENTHANDLER_REGISTER(
333 ifnet_departure_event, lagg_port_ifdetach, NULL,
334 EVENTHANDLER_PRI_ANY);
335 break;
336 case MOD_UNLOAD:
337 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
338 lagg_detach_cookie);
339 lagg_input_ethernet_p = NULL;
340 lagg_input_infiniband_p = NULL;
341 lagg_linkstate_p = NULL;
342 break;
343 default:
344 return (EOPNOTSUPP);
345 }
346 return (0);
347 }
348
349 static moduledata_t lagg_mod = {
350 "if_lagg",
351 lagg_modevent,
352 0
353 };
354
355 DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
356 MODULE_VERSION(if_lagg, 1);
357 MODULE_DEPEND(if_lagg, if_infiniband, 1, 1, 1);
358
359 static void
lagg_proto_attach(struct lagg_softc * sc,lagg_proto pr)360 lagg_proto_attach(struct lagg_softc *sc, lagg_proto pr)
361 {
362
363 LAGG_XLOCK_ASSERT(sc);
364 KASSERT(sc->sc_proto == LAGG_PROTO_NONE, ("%s: sc %p has proto",
365 __func__, sc));
366
367 if (sc->sc_ifflags & IFF_DEBUG)
368 if_printf(sc->sc_ifp, "using proto %u\n", pr);
369
370 if (lagg_protos[pr].pr_attach != NULL)
371 lagg_protos[pr].pr_attach(sc);
372 sc->sc_proto = pr;
373 }
374
375 static void
lagg_proto_detach(struct lagg_softc * sc)376 lagg_proto_detach(struct lagg_softc *sc)
377 {
378 lagg_proto pr;
379
380 LAGG_XLOCK_ASSERT(sc);
381 pr = sc->sc_proto;
382 sc->sc_proto = LAGG_PROTO_NONE;
383
384 if (lagg_protos[pr].pr_detach != NULL)
385 lagg_protos[pr].pr_detach(sc);
386 }
387
388 static inline int
lagg_proto_start(struct lagg_softc * sc,struct mbuf * m)389 lagg_proto_start(struct lagg_softc *sc, struct mbuf *m)
390 {
391
392 return (lagg_protos[sc->sc_proto].pr_start(sc, m));
393 }
394
395 static inline struct mbuf *
lagg_proto_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)396 lagg_proto_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
397 {
398
399 return (lagg_protos[sc->sc_proto].pr_input(sc, lp, m));
400 }
401
402 static int
lagg_proto_addport(struct lagg_softc * sc,struct lagg_port * lp)403 lagg_proto_addport(struct lagg_softc *sc, struct lagg_port *lp)
404 {
405
406 if (lagg_protos[sc->sc_proto].pr_addport == NULL)
407 return (0);
408 else
409 return (lagg_protos[sc->sc_proto].pr_addport(lp));
410 }
411
412 static void
lagg_proto_delport(struct lagg_softc * sc,struct lagg_port * lp)413 lagg_proto_delport(struct lagg_softc *sc, struct lagg_port *lp)
414 {
415
416 if (lagg_protos[sc->sc_proto].pr_delport != NULL)
417 lagg_protos[sc->sc_proto].pr_delport(lp);
418 }
419
420 static void
lagg_proto_linkstate(struct lagg_softc * sc,struct lagg_port * lp)421 lagg_proto_linkstate(struct lagg_softc *sc, struct lagg_port *lp)
422 {
423
424 if (lagg_protos[sc->sc_proto].pr_linkstate != NULL)
425 lagg_protos[sc->sc_proto].pr_linkstate(lp);
426 }
427
428 static void
lagg_proto_init(struct lagg_softc * sc)429 lagg_proto_init(struct lagg_softc *sc)
430 {
431
432 if (lagg_protos[sc->sc_proto].pr_init != NULL)
433 lagg_protos[sc->sc_proto].pr_init(sc);
434 }
435
436 static void
lagg_proto_stop(struct lagg_softc * sc)437 lagg_proto_stop(struct lagg_softc *sc)
438 {
439
440 if (lagg_protos[sc->sc_proto].pr_stop != NULL)
441 lagg_protos[sc->sc_proto].pr_stop(sc);
442 }
443
444 static void
lagg_proto_lladdr(struct lagg_softc * sc)445 lagg_proto_lladdr(struct lagg_softc *sc)
446 {
447
448 if (lagg_protos[sc->sc_proto].pr_lladdr != NULL)
449 lagg_protos[sc->sc_proto].pr_lladdr(sc);
450 }
451
452 static void
lagg_proto_request(struct lagg_softc * sc,void * v)453 lagg_proto_request(struct lagg_softc *sc, void *v)
454 {
455
456 if (lagg_protos[sc->sc_proto].pr_request != NULL)
457 lagg_protos[sc->sc_proto].pr_request(sc, v);
458 }
459
460 static void
lagg_proto_portreq(struct lagg_softc * sc,struct lagg_port * lp,void * v)461 lagg_proto_portreq(struct lagg_softc *sc, struct lagg_port *lp, void *v)
462 {
463
464 if (lagg_protos[sc->sc_proto].pr_portreq != NULL)
465 lagg_protos[sc->sc_proto].pr_portreq(lp, v);
466 }
467
468 /*
469 * This routine is run via an vlan
470 * config EVENT
471 */
472 static void
lagg_register_vlan(void * arg,struct ifnet * ifp,u_int16_t vtag)473 lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
474 {
475 struct lagg_softc *sc = ifp->if_softc;
476 struct lagg_port *lp;
477
478 if (ifp->if_softc != arg) /* Not our event */
479 return;
480
481 LAGG_XLOCK(sc);
482 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
483 EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp, vtag);
484 LAGG_XUNLOCK(sc);
485 }
486
487 /*
488 * This routine is run via an vlan
489 * unconfig EVENT
490 */
491 static void
lagg_unregister_vlan(void * arg,struct ifnet * ifp,u_int16_t vtag)492 lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag)
493 {
494 struct lagg_softc *sc = ifp->if_softc;
495 struct lagg_port *lp;
496
497 if (ifp->if_softc != arg) /* Not our event */
498 return;
499
500 LAGG_XLOCK(sc);
501 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
502 EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp, vtag);
503 LAGG_XUNLOCK(sc);
504 }
505
506 static int
lagg_clone_create(struct if_clone * ifc,char * name,size_t len,struct ifc_data * ifd,struct ifnet ** ifpp)507 lagg_clone_create(struct if_clone *ifc, char *name, size_t len,
508 struct ifc_data *ifd, struct ifnet **ifpp)
509 {
510 struct iflaggparam iflp;
511 struct lagg_softc *sc;
512 struct ifnet *ifp;
513 int if_type;
514 int error;
515 static const uint8_t eaddr[LAGG_ADDR_LEN];
516
517 if (ifd->params != NULL) {
518 error = ifc_copyin(ifd, &iflp, sizeof(iflp));
519 if (error)
520 return (error);
521
522 switch (iflp.lagg_type) {
523 case LAGG_TYPE_ETHERNET:
524 if_type = IFT_ETHER;
525 break;
526 case LAGG_TYPE_INFINIBAND:
527 if_type = IFT_INFINIBAND;
528 break;
529 default:
530 return (EINVAL);
531 }
532 } else {
533 if_type = IFT_ETHER;
534 }
535
536 sc = malloc(sizeof(*sc), M_LAGG, M_WAITOK | M_ZERO);
537 ifp = sc->sc_ifp = if_alloc(if_type);
538 LAGG_SX_INIT(sc);
539
540 mtx_init(&sc->sc_mtx, "lagg-mtx", NULL, MTX_DEF);
541 callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0);
542
543 LAGG_XLOCK(sc);
544 if (V_def_use_flowid)
545 sc->sc_opts |= LAGG_OPT_USE_FLOWID;
546 if (V_def_use_numa)
547 sc->sc_opts |= LAGG_OPT_USE_NUMA;
548 sc->flowid_shift = V_def_flowid_shift;
549
550 /* Hash all layers by default */
551 sc->sc_flags = MBUF_HASHFLAG_L2 | MBUF_HASHFLAG_L3 | MBUF_HASHFLAG_L4;
552
553 lagg_proto_attach(sc, LAGG_PROTO_DEFAULT);
554
555 CK_SLIST_INIT(&sc->sc_ports);
556
557 switch (if_type) {
558 case IFT_ETHER:
559 /* Initialise pseudo media types */
560 ifmedia_init(&sc->sc_media, 0, lagg_media_change,
561 lagg_media_status);
562 ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL);
563 ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO);
564
565 if_initname(ifp, laggname, ifd->unit);
566 ifp->if_transmit = lagg_transmit_ethernet;
567 break;
568 case IFT_INFINIBAND:
569 if_initname(ifp, laggname, ifd->unit);
570 ifp->if_transmit = lagg_transmit_infiniband;
571 break;
572 default:
573 break;
574 }
575 ifp->if_softc = sc;
576 ifp->if_qflush = lagg_qflush;
577 ifp->if_init = lagg_init;
578 ifp->if_ioctl = lagg_ioctl;
579 ifp->if_get_counter = lagg_get_counter;
580 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
581 #if defined(KERN_TLS) || defined(RATELIMIT)
582 ifp->if_snd_tag_alloc = lagg_snd_tag_alloc;
583 ifp->if_ratelimit_query = lagg_ratelimit_query;
584 #endif
585 ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS;
586
587 /*
588 * Attach as an ordinary ethernet device, children will be attached
589 * as special device IFT_IEEE8023ADLAG or IFT_INFINIBANDLAG.
590 */
591 switch (if_type) {
592 case IFT_ETHER:
593 ether_ifattach(ifp, eaddr);
594 break;
595 case IFT_INFINIBAND:
596 infiniband_ifattach(ifp, eaddr, sc->sc_bcast_addr);
597 break;
598 default:
599 break;
600 }
601
602 sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config,
603 lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST);
604 sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig,
605 lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST);
606
607 /* Insert into the global list of laggs */
608 LAGG_LIST_LOCK();
609 SLIST_INSERT_HEAD(&V_lagg_list, sc, sc_entries);
610 LAGG_LIST_UNLOCK();
611 LAGG_XUNLOCK(sc);
612 *ifpp = ifp;
613
614 return (0);
615 }
616
617 static int
lagg_clone_destroy(struct if_clone * ifc,struct ifnet * ifp,uint32_t flags)618 lagg_clone_destroy(struct if_clone *ifc, struct ifnet *ifp, uint32_t flags)
619 {
620 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
621 struct lagg_port *lp;
622
623 LAGG_XLOCK(sc);
624 sc->sc_destroying = 1;
625 lagg_stop(sc);
626 ifp->if_flags &= ~IFF_UP;
627
628 EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach);
629 EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach);
630
631 /* Shutdown and remove lagg ports */
632 while ((lp = CK_SLIST_FIRST(&sc->sc_ports)) != NULL)
633 lagg_port_destroy(lp, 1);
634
635 /* Unhook the aggregation protocol */
636 lagg_proto_detach(sc);
637 LAGG_XUNLOCK(sc);
638
639 switch (ifp->if_type) {
640 case IFT_ETHER:
641 ether_ifdetach(ifp);
642 ifmedia_removeall(&sc->sc_media);
643 break;
644 case IFT_INFINIBAND:
645 infiniband_ifdetach(ifp);
646 break;
647 default:
648 break;
649 }
650 if_free(ifp);
651
652 LAGG_LIST_LOCK();
653 SLIST_REMOVE(&V_lagg_list, sc, lagg_softc, sc_entries);
654 LAGG_LIST_UNLOCK();
655
656 mtx_destroy(&sc->sc_mtx);
657 LAGG_SX_DESTROY(sc);
658 free(sc, M_LAGG);
659
660 return (0);
661 }
662
663 static void
lagg_capabilities(struct lagg_softc * sc)664 lagg_capabilities(struct lagg_softc *sc)
665 {
666 struct lagg_port *lp;
667 int cap, cap2, ena, ena2, pena, pena2;
668 uint64_t hwa;
669 struct ifnet_hw_tsomax hw_tsomax;
670
671 LAGG_XLOCK_ASSERT(sc);
672
673 /* Get common enabled capabilities for the lagg ports */
674 ena = ena2 = ~0;
675 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
676 ena &= lp->lp_ifp->if_capenable;
677 ena2 &= lp->lp_ifp->if_capenable2;
678 }
679 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL)
680 ena = ena2 = 0;
681
682 /*
683 * Apply common enabled capabilities back to the lagg ports.
684 * May require several iterations if they are dependent.
685 */
686 do {
687 pena = ena;
688 pena2 = ena2;
689 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
690 lagg_setcaps(lp, ena, ena2);
691 ena &= lp->lp_ifp->if_capenable;
692 ena2 &= lp->lp_ifp->if_capenable2;
693 }
694 } while (pena != ena || pena2 != ena2);
695
696 /* Get other capabilities from the lagg ports */
697 cap = cap2 = ~0;
698 hwa = ~(uint64_t)0;
699 memset(&hw_tsomax, 0, sizeof(hw_tsomax));
700 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
701 cap &= lp->lp_ifp->if_capabilities;
702 cap2 &= lp->lp_ifp->if_capabilities2;
703 hwa &= lp->lp_ifp->if_hwassist;
704 if_hw_tsomax_common(lp->lp_ifp, &hw_tsomax);
705 }
706 if (CK_SLIST_FIRST(&sc->sc_ports) == NULL)
707 cap = cap2 = hwa = 0;
708
709 if (sc->sc_ifp->if_capabilities != cap ||
710 sc->sc_ifp->if_capenable != ena ||
711 sc->sc_ifp->if_capenable2 != ena2 ||
712 sc->sc_ifp->if_hwassist != hwa ||
713 if_hw_tsomax_update(sc->sc_ifp, &hw_tsomax) != 0) {
714 sc->sc_ifp->if_capabilities = cap;
715 sc->sc_ifp->if_capabilities2 = cap2;
716 sc->sc_ifp->if_capenable = ena;
717 sc->sc_ifp->if_capenable2 = ena2;
718 sc->sc_ifp->if_hwassist = hwa;
719 getmicrotime(&sc->sc_ifp->if_lastchange);
720
721 if (sc->sc_ifflags & IFF_DEBUG)
722 if_printf(sc->sc_ifp,
723 "capabilities 0x%08x enabled 0x%08x\n", cap, ena);
724 }
725 }
726
727 static int
lagg_port_create(struct lagg_softc * sc,struct ifnet * ifp)728 lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp)
729 {
730 struct lagg_softc *sc_ptr;
731 struct lagg_port *lp, *tlp;
732 struct ifreq ifr;
733 int error, i, oldmtu;
734 int if_type;
735 uint64_t *pval;
736
737 LAGG_XLOCK_ASSERT(sc);
738
739 if (sc->sc_ifp == ifp) {
740 if_printf(sc->sc_ifp,
741 "cannot add a lagg to itself as a port\n");
742 return (EINVAL);
743 }
744
745 if (sc->sc_destroying == 1)
746 return (ENXIO);
747
748 /* Limit the maximal number of lagg ports */
749 if (sc->sc_count >= LAGG_MAX_PORTS)
750 return (ENOSPC);
751
752 /* Check if port has already been associated to a lagg */
753 if (ifp->if_lagg != NULL) {
754 /* Port is already in the current lagg? */
755 lp = (struct lagg_port *)ifp->if_lagg;
756 if (lp->lp_softc == sc)
757 return (EEXIST);
758 return (EBUSY);
759 }
760
761 switch (sc->sc_ifp->if_type) {
762 case IFT_ETHER:
763 /* XXX Disallow non-ethernet interfaces (this should be any of 802) */
764 if (ifp->if_type != IFT_ETHER && ifp->if_type != IFT_L2VLAN)
765 return (EPROTONOSUPPORT);
766 if_type = IFT_IEEE8023ADLAG;
767 break;
768 case IFT_INFINIBAND:
769 /* XXX Disallow non-infiniband interfaces */
770 if (ifp->if_type != IFT_INFINIBAND)
771 return (EPROTONOSUPPORT);
772 if_type = IFT_INFINIBANDLAG;
773 break;
774 default:
775 break;
776 }
777
778 /* Allow the first Ethernet member to define the MTU */
779 oldmtu = -1;
780 if (CK_SLIST_EMPTY(&sc->sc_ports)) {
781 sc->sc_ifp->if_mtu = ifp->if_mtu;
782 } else if (sc->sc_ifp->if_mtu != ifp->if_mtu) {
783 if (ifp->if_ioctl == NULL) {
784 if_printf(sc->sc_ifp, "cannot change MTU for %s\n",
785 ifp->if_xname);
786 return (EINVAL);
787 }
788 oldmtu = ifp->if_mtu;
789 strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name));
790 ifr.ifr_mtu = sc->sc_ifp->if_mtu;
791 error = (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
792 if (error != 0) {
793 if_printf(sc->sc_ifp, "invalid MTU for %s\n",
794 ifp->if_xname);
795 return (error);
796 }
797 ifr.ifr_mtu = oldmtu;
798 }
799
800 lp = malloc(sizeof(struct lagg_port), M_LAGG, M_WAITOK | M_ZERO);
801 lp->lp_softc = sc;
802
803 /* Check if port is a stacked lagg */
804 LAGG_LIST_LOCK();
805 SLIST_FOREACH(sc_ptr, &V_lagg_list, sc_entries) {
806 if (ifp == sc_ptr->sc_ifp) {
807 LAGG_LIST_UNLOCK();
808 free(lp, M_LAGG);
809 if (oldmtu != -1)
810 (*ifp->if_ioctl)(ifp, SIOCSIFMTU,
811 (caddr_t)&ifr);
812 return (EINVAL);
813 /* XXX disable stacking for the moment, its untested */
814 #ifdef LAGG_PORT_STACKING
815 lp->lp_flags |= LAGG_PORT_STACK;
816 if (lagg_port_checkstacking(sc_ptr) >=
817 LAGG_MAX_STACKING) {
818 LAGG_LIST_UNLOCK();
819 free(lp, M_LAGG);
820 if (oldmtu != -1)
821 (*ifp->if_ioctl)(ifp, SIOCSIFMTU,
822 (caddr_t)&ifr);
823 return (E2BIG);
824 }
825 #endif
826 }
827 }
828 LAGG_LIST_UNLOCK();
829
830 if_ref(ifp);
831 lp->lp_ifp = ifp;
832
833 bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ifp->if_addrlen);
834 lp->lp_ifcapenable = ifp->if_capenable;
835 if (CK_SLIST_EMPTY(&sc->sc_ports)) {
836 bcopy(IF_LLADDR(ifp), IF_LLADDR(sc->sc_ifp), ifp->if_addrlen);
837 lagg_proto_lladdr(sc);
838 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
839 } else {
840 if_setlladdr(ifp, IF_LLADDR(sc->sc_ifp), ifp->if_addrlen);
841 }
842 lagg_setflags(lp, 1);
843
844 if (CK_SLIST_EMPTY(&sc->sc_ports))
845 sc->sc_primary = lp;
846
847 /* Change the interface type */
848 lp->lp_iftype = ifp->if_type;
849 ifp->if_type = if_type;
850 ifp->if_lagg = lp;
851 lp->lp_ioctl = ifp->if_ioctl;
852 ifp->if_ioctl = lagg_port_ioctl;
853 lp->lp_output = ifp->if_output;
854 ifp->if_output = lagg_port_output;
855
856 /* Read port counters */
857 pval = lp->port_counters.val;
858 for (i = 0; i < IFCOUNTERS; i++, pval++)
859 *pval = ifp->if_get_counter(ifp, i);
860
861 /*
862 * Insert into the list of ports.
863 * Keep ports sorted by if_index. It is handy, when configuration
864 * is predictable and `ifconfig laggN create ...` command
865 * will lead to the same result each time.
866 */
867 CK_SLIST_FOREACH(tlp, &sc->sc_ports, lp_entries) {
868 if (tlp->lp_ifp->if_index < ifp->if_index && (
869 CK_SLIST_NEXT(tlp, lp_entries) == NULL ||
870 ((struct lagg_port*)CK_SLIST_NEXT(tlp, lp_entries))->lp_ifp->if_index >
871 ifp->if_index))
872 break;
873 }
874 if (tlp != NULL)
875 CK_SLIST_INSERT_AFTER(tlp, lp, lp_entries);
876 else
877 CK_SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries);
878 sc->sc_count++;
879
880 lagg_setmulti(lp);
881
882 if ((error = lagg_proto_addport(sc, lp)) != 0) {
883 /* Remove the port, without calling pr_delport. */
884 lagg_port_destroy(lp, 0);
885 if (oldmtu != -1)
886 (*ifp->if_ioctl)(ifp, SIOCSIFMTU, (caddr_t)&ifr);
887 return (error);
888 }
889
890 /* Update lagg capabilities */
891 lagg_capabilities(sc);
892 lagg_linkstate(sc);
893
894 return (0);
895 }
896
897 #ifdef LAGG_PORT_STACKING
898 static int
lagg_port_checkstacking(struct lagg_softc * sc)899 lagg_port_checkstacking(struct lagg_softc *sc)
900 {
901 struct lagg_softc *sc_ptr;
902 struct lagg_port *lp;
903 int m = 0;
904
905 LAGG_SXLOCK_ASSERT(sc);
906 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
907 if (lp->lp_flags & LAGG_PORT_STACK) {
908 sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc;
909 m = MAX(m, lagg_port_checkstacking(sc_ptr));
910 }
911 }
912
913 return (m + 1);
914 }
915 #endif
916
917 static void
lagg_port_destroy_cb(epoch_context_t ec)918 lagg_port_destroy_cb(epoch_context_t ec)
919 {
920 struct lagg_port *lp;
921 struct ifnet *ifp;
922
923 lp = __containerof(ec, struct lagg_port, lp_epoch_ctx);
924 ifp = lp->lp_ifp;
925
926 if_rele(ifp);
927 free(lp, M_LAGG);
928 }
929
930 static int
lagg_port_destroy(struct lagg_port * lp,int rundelport)931 lagg_port_destroy(struct lagg_port *lp, int rundelport)
932 {
933 struct lagg_softc *sc = lp->lp_softc;
934 struct lagg_port *lp_ptr, *lp0;
935 struct ifnet *ifp = lp->lp_ifp;
936 uint64_t *pval, vdiff;
937 int i;
938
939 LAGG_XLOCK_ASSERT(sc);
940
941 if (rundelport)
942 lagg_proto_delport(sc, lp);
943
944 if (lp->lp_detaching == 0)
945 lagg_clrmulti(lp);
946
947 /* Restore interface */
948 ifp->if_type = lp->lp_iftype;
949 ifp->if_ioctl = lp->lp_ioctl;
950 ifp->if_output = lp->lp_output;
951 ifp->if_lagg = NULL;
952
953 /* Update detached port counters */
954 pval = lp->port_counters.val;
955 for (i = 0; i < IFCOUNTERS; i++, pval++) {
956 vdiff = ifp->if_get_counter(ifp, i) - *pval;
957 sc->detached_counters.val[i] += vdiff;
958 }
959
960 /* Finally, remove the port from the lagg */
961 CK_SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries);
962 sc->sc_count--;
963
964 /* Update the primary interface */
965 if (lp == sc->sc_primary) {
966 uint8_t lladdr[LAGG_ADDR_LEN];
967
968 if ((lp0 = CK_SLIST_FIRST(&sc->sc_ports)) == NULL)
969 bzero(&lladdr, LAGG_ADDR_LEN);
970 else
971 bcopy(lp0->lp_lladdr, lladdr, LAGG_ADDR_LEN);
972 sc->sc_primary = lp0;
973 if (sc->sc_destroying == 0) {
974 bcopy(lladdr, IF_LLADDR(sc->sc_ifp), sc->sc_ifp->if_addrlen);
975 lagg_proto_lladdr(sc);
976 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
977
978 /*
979 * Update lladdr for each port (new primary needs update
980 * as well, to switch from old lladdr to its 'real' one).
981 * We can skip this if the lagg is being destroyed.
982 */
983 CK_SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries)
984 if_setlladdr(lp_ptr->lp_ifp, lladdr,
985 lp_ptr->lp_ifp->if_addrlen);
986 }
987 }
988
989 if (lp->lp_ifflags)
990 if_printf(ifp, "%s: lp_ifflags unclean\n", __func__);
991
992 if (lp->lp_detaching == 0) {
993 lagg_setflags(lp, 0);
994 lagg_setcaps(lp, lp->lp_ifcapenable, lp->lp_ifcapenable2);
995 if_setlladdr(ifp, lp->lp_lladdr, ifp->if_addrlen);
996 }
997
998 /*
999 * free port and release it's ifnet reference after a grace period has
1000 * elapsed.
1001 */
1002 NET_EPOCH_CALL(lagg_port_destroy_cb, &lp->lp_epoch_ctx);
1003 /* Update lagg capabilities */
1004 lagg_capabilities(sc);
1005 lagg_linkstate(sc);
1006
1007 return (0);
1008 }
1009
1010 static int
lagg_port_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)1011 lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1012 {
1013 struct lagg_reqport *rp = (struct lagg_reqport *)data;
1014 struct lagg_softc *sc;
1015 struct lagg_port *lp = NULL;
1016 int error = 0;
1017
1018 /* Should be checked by the caller */
1019 switch (ifp->if_type) {
1020 case IFT_IEEE8023ADLAG:
1021 case IFT_INFINIBANDLAG:
1022 if ((lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL)
1023 goto fallback;
1024 break;
1025 default:
1026 goto fallback;
1027 }
1028
1029 switch (cmd) {
1030 case SIOCGLAGGPORT:
1031 if (rp->rp_portname[0] == '\0' ||
1032 ifunit(rp->rp_portname) != ifp) {
1033 error = EINVAL;
1034 break;
1035 }
1036
1037 LAGG_SLOCK(sc);
1038 if (__predict_true((lp = ifp->if_lagg) != NULL &&
1039 lp->lp_softc == sc))
1040 lagg_port2req(lp, rp);
1041 else
1042 error = ENOENT; /* XXXGL: can happen? */
1043 LAGG_SUNLOCK(sc);
1044 break;
1045
1046 case SIOCSIFCAP:
1047 case SIOCSIFCAPNV:
1048 if (lp->lp_ioctl == NULL) {
1049 error = EINVAL;
1050 break;
1051 }
1052 error = (*lp->lp_ioctl)(ifp, cmd, data);
1053 if (error)
1054 break;
1055
1056 /* Update lagg interface capabilities */
1057 LAGG_XLOCK(sc);
1058 lagg_capabilities(sc);
1059 LAGG_XUNLOCK(sc);
1060 VLAN_CAPABILITIES(sc->sc_ifp);
1061 break;
1062
1063 case SIOCSIFMTU:
1064 /* Do not allow the MTU to be changed once joined */
1065 error = EINVAL;
1066 break;
1067
1068 default:
1069 goto fallback;
1070 }
1071
1072 return (error);
1073
1074 fallback:
1075 if (lp != NULL && lp->lp_ioctl != NULL)
1076 return ((*lp->lp_ioctl)(ifp, cmd, data));
1077
1078 return (EINVAL);
1079 }
1080
1081 /*
1082 * Requests counter @cnt data.
1083 *
1084 * Counter value is calculated the following way:
1085 * 1) for each port, sum difference between current and "initial" measurements.
1086 * 2) add lagg logical interface counters.
1087 * 3) add data from detached_counters array.
1088 *
1089 * We also do the following things on ports attach/detach:
1090 * 1) On port attach we store all counters it has into port_counter array.
1091 * 2) On port detach we add the different between "initial" and
1092 * current counters data to detached_counters array.
1093 */
1094 static uint64_t
lagg_get_counter(struct ifnet * ifp,ift_counter cnt)1095 lagg_get_counter(struct ifnet *ifp, ift_counter cnt)
1096 {
1097 struct epoch_tracker et;
1098 struct lagg_softc *sc;
1099 struct lagg_port *lp;
1100 struct ifnet *lpifp;
1101 uint64_t newval, oldval, vsum;
1102
1103 /* Revise this when we've got non-generic counters. */
1104 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1105
1106 sc = (struct lagg_softc *)ifp->if_softc;
1107
1108 vsum = 0;
1109 NET_EPOCH_ENTER(et);
1110 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1111 /* Saved attached value */
1112 oldval = lp->port_counters.val[cnt];
1113 /* current value */
1114 lpifp = lp->lp_ifp;
1115 newval = lpifp->if_get_counter(lpifp, cnt);
1116 /* Calculate diff and save new */
1117 vsum += newval - oldval;
1118 }
1119 NET_EPOCH_EXIT(et);
1120
1121 /*
1122 * Add counter data which might be added by upper
1123 * layer protocols operating on logical interface.
1124 */
1125 vsum += if_get_counter_default(ifp, cnt);
1126
1127 /*
1128 * Add counter data from detached ports counters
1129 */
1130 vsum += sc->detached_counters.val[cnt];
1131
1132 return (vsum);
1133 }
1134
1135 /*
1136 * For direct output to child ports.
1137 */
1138 static int
lagg_port_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)1139 lagg_port_output(struct ifnet *ifp, struct mbuf *m,
1140 const struct sockaddr *dst, struct route *ro)
1141 {
1142 struct lagg_port *lp = ifp->if_lagg;
1143
1144 switch (dst->sa_family) {
1145 case pseudo_AF_HDRCMPLT:
1146 case AF_UNSPEC:
1147 if (lp != NULL)
1148 return ((*lp->lp_output)(ifp, m, dst, ro));
1149 }
1150
1151 /* drop any other frames */
1152 m_freem(m);
1153 return (ENETDOWN);
1154 }
1155
1156 static void
lagg_port_ifdetach(void * arg __unused,struct ifnet * ifp)1157 lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp)
1158 {
1159 struct lagg_port *lp;
1160 struct lagg_softc *sc;
1161
1162 if ((lp = ifp->if_lagg) == NULL)
1163 return;
1164 /* If the ifnet is just being renamed, don't do anything. */
1165 if (ifp->if_flags & IFF_RENAMING)
1166 return;
1167
1168 sc = lp->lp_softc;
1169
1170 LAGG_XLOCK(sc);
1171 lp->lp_detaching = 1;
1172 lagg_port_destroy(lp, 1);
1173 LAGG_XUNLOCK(sc);
1174 VLAN_CAPABILITIES(sc->sc_ifp);
1175 }
1176
1177 static void
lagg_port2req(struct lagg_port * lp,struct lagg_reqport * rp)1178 lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp)
1179 {
1180 struct lagg_softc *sc = lp->lp_softc;
1181
1182 strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname));
1183 strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname));
1184 rp->rp_prio = lp->lp_prio;
1185 rp->rp_flags = lp->lp_flags;
1186 lagg_proto_portreq(sc, lp, &rp->rp_psc);
1187
1188 /* Add protocol specific flags */
1189 switch (sc->sc_proto) {
1190 case LAGG_PROTO_FAILOVER:
1191 if (lp == sc->sc_primary)
1192 rp->rp_flags |= LAGG_PORT_MASTER;
1193 if (lp == lagg_link_active(sc, sc->sc_primary))
1194 rp->rp_flags |= LAGG_PORT_ACTIVE;
1195 break;
1196
1197 case LAGG_PROTO_ROUNDROBIN:
1198 case LAGG_PROTO_LOADBALANCE:
1199 case LAGG_PROTO_BROADCAST:
1200 if (LAGG_PORTACTIVE(lp))
1201 rp->rp_flags |= LAGG_PORT_ACTIVE;
1202 break;
1203
1204 case LAGG_PROTO_LACP:
1205 /* LACP has a different definition of active */
1206 if (lacp_isactive(lp))
1207 rp->rp_flags |= LAGG_PORT_ACTIVE;
1208 if (lacp_iscollecting(lp))
1209 rp->rp_flags |= LAGG_PORT_COLLECTING;
1210 if (lacp_isdistributing(lp))
1211 rp->rp_flags |= LAGG_PORT_DISTRIBUTING;
1212 break;
1213 }
1214
1215 }
1216
1217 static void
lagg_watchdog_infiniband(void * arg)1218 lagg_watchdog_infiniband(void *arg)
1219 {
1220 struct epoch_tracker et;
1221 struct lagg_softc *sc;
1222 struct lagg_port *lp;
1223 struct ifnet *ifp;
1224 struct ifnet *lp_ifp;
1225
1226 sc = arg;
1227
1228 /*
1229 * Because infiniband nodes have a fixed MAC address, which is
1230 * generated by the so-called GID, we need to regularly update
1231 * the link level address of the parent lagg<N> device when
1232 * the active port changes. Possibly we could piggy-back on
1233 * link up/down events aswell, but using a timer also provides
1234 * a guarantee against too frequent events. This operation
1235 * does not have to be atomic.
1236 */
1237 NET_EPOCH_ENTER(et);
1238 lp = lagg_link_active(sc, sc->sc_primary);
1239 if (lp != NULL) {
1240 ifp = sc->sc_ifp;
1241 lp_ifp = lp->lp_ifp;
1242
1243 if (ifp != NULL && lp_ifp != NULL &&
1244 (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen) != 0 ||
1245 memcmp(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen) != 0)) {
1246 memcpy(IF_LLADDR(ifp), IF_LLADDR(lp_ifp), ifp->if_addrlen);
1247 memcpy(sc->sc_bcast_addr, lp_ifp->if_broadcastaddr, ifp->if_addrlen);
1248
1249 CURVNET_SET(ifp->if_vnet);
1250 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
1251 CURVNET_RESTORE();
1252 }
1253 }
1254 NET_EPOCH_EXIT(et);
1255
1256 callout_reset(&sc->sc_watchdog, hz, &lagg_watchdog_infiniband, arg);
1257 }
1258
1259 static void
lagg_if_updown(struct lagg_softc * sc,bool up)1260 lagg_if_updown(struct lagg_softc *sc, bool up)
1261 {
1262 struct ifreq ifr = {};
1263 struct lagg_port *lp;
1264
1265 LAGG_XLOCK_ASSERT(sc);
1266
1267 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1268 if (up)
1269 if_up(lp->lp_ifp);
1270 else
1271 if_down(lp->lp_ifp);
1272
1273 if (lp->lp_ioctl != NULL)
1274 lp->lp_ioctl(lp->lp_ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1275 }
1276 }
1277
1278 static void
lagg_init(void * xsc)1279 lagg_init(void *xsc)
1280 {
1281 struct lagg_softc *sc = (struct lagg_softc *)xsc;
1282 struct ifnet *ifp = sc->sc_ifp;
1283 struct lagg_port *lp;
1284
1285 LAGG_XLOCK(sc);
1286 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
1287 LAGG_XUNLOCK(sc);
1288 return;
1289 }
1290
1291 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1292
1293 /*
1294 * Update the port lladdrs if needed.
1295 * This might be if_setlladdr() notification
1296 * that lladdr has been changed.
1297 */
1298 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1299 if (memcmp(IF_LLADDR(ifp), IF_LLADDR(lp->lp_ifp),
1300 ifp->if_addrlen) != 0)
1301 if_setlladdr(lp->lp_ifp, IF_LLADDR(ifp), ifp->if_addrlen);
1302 }
1303
1304 lagg_if_updown(sc, true);
1305
1306 lagg_proto_init(sc);
1307
1308 if (ifp->if_type == IFT_INFINIBAND) {
1309 mtx_lock(&sc->sc_mtx);
1310 lagg_watchdog_infiniband(sc);
1311 mtx_unlock(&sc->sc_mtx);
1312 }
1313
1314 LAGG_XUNLOCK(sc);
1315 }
1316
1317 static void
lagg_stop(struct lagg_softc * sc)1318 lagg_stop(struct lagg_softc *sc)
1319 {
1320 struct ifnet *ifp = sc->sc_ifp;
1321
1322 LAGG_XLOCK_ASSERT(sc);
1323
1324 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1325 return;
1326
1327 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1328
1329 lagg_proto_stop(sc);
1330
1331 mtx_lock(&sc->sc_mtx);
1332 callout_stop(&sc->sc_watchdog);
1333 mtx_unlock(&sc->sc_mtx);
1334
1335 lagg_if_updown(sc, false);
1336
1337 callout_drain(&sc->sc_watchdog);
1338 }
1339
1340 static int
lagg_ioctl(struct ifnet * ifp,u_long cmd,caddr_t data)1341 lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1342 {
1343 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
1344 struct lagg_reqall *ra = (struct lagg_reqall *)data;
1345 struct lagg_reqopts *ro = (struct lagg_reqopts *)data;
1346 struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf;
1347 struct lagg_reqflags *rf = (struct lagg_reqflags *)data;
1348 struct ifreq *ifr = (struct ifreq *)data;
1349 struct lagg_port *lp;
1350 struct ifnet *tpif;
1351 struct thread *td = curthread;
1352 char *buf, *outbuf;
1353 int count, buflen, len, error = 0, oldmtu;
1354
1355 bzero(&rpbuf, sizeof(rpbuf));
1356
1357 /* XXX: This can race with lagg_clone_destroy. */
1358
1359 switch (cmd) {
1360 case SIOCGLAGG:
1361 LAGG_XLOCK(sc);
1362 buflen = sc->sc_count * sizeof(struct lagg_reqport);
1363 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1364 ra->ra_proto = sc->sc_proto;
1365 lagg_proto_request(sc, &ra->ra_psc);
1366 count = 0;
1367 buf = outbuf;
1368 len = min(ra->ra_size, buflen);
1369 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1370 if (len < sizeof(rpbuf))
1371 break;
1372
1373 lagg_port2req(lp, &rpbuf);
1374 memcpy(buf, &rpbuf, sizeof(rpbuf));
1375 count++;
1376 buf += sizeof(rpbuf);
1377 len -= sizeof(rpbuf);
1378 }
1379 LAGG_XUNLOCK(sc);
1380 ra->ra_ports = count;
1381 ra->ra_size = count * sizeof(rpbuf);
1382 error = copyout(outbuf, ra->ra_port, ra->ra_size);
1383 free(outbuf, M_TEMP);
1384 break;
1385 case SIOCSLAGG:
1386 error = priv_check(td, PRIV_NET_LAGG);
1387 if (error)
1388 break;
1389 if (ra->ra_proto >= LAGG_PROTO_MAX) {
1390 error = EPROTONOSUPPORT;
1391 break;
1392 }
1393 /* Infiniband only supports the failover protocol. */
1394 if (ra->ra_proto != LAGG_PROTO_FAILOVER &&
1395 ifp->if_type == IFT_INFINIBAND) {
1396 error = EPROTONOSUPPORT;
1397 break;
1398 }
1399 LAGG_XLOCK(sc);
1400 lagg_proto_detach(sc);
1401 lagg_proto_attach(sc, ra->ra_proto);
1402 LAGG_XUNLOCK(sc);
1403 break;
1404 case SIOCGLAGGOPTS:
1405 LAGG_XLOCK(sc);
1406 ro->ro_opts = sc->sc_opts;
1407 if (sc->sc_proto == LAGG_PROTO_LACP) {
1408 struct lacp_softc *lsc;
1409
1410 lsc = (struct lacp_softc *)sc->sc_psc;
1411 if (lsc->lsc_debug.lsc_tx_test != 0)
1412 ro->ro_opts |= LAGG_OPT_LACP_TXTEST;
1413 if (lsc->lsc_debug.lsc_rx_test != 0)
1414 ro->ro_opts |= LAGG_OPT_LACP_RXTEST;
1415 if (lsc->lsc_strict_mode != 0)
1416 ro->ro_opts |= LAGG_OPT_LACP_STRICT;
1417 if (lsc->lsc_fast_timeout != 0)
1418 ro->ro_opts |= LAGG_OPT_LACP_FAST_TIMO;
1419
1420 ro->ro_active = sc->sc_active;
1421 } else {
1422 ro->ro_active = 0;
1423 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
1424 ro->ro_active += LAGG_PORTACTIVE(lp);
1425 }
1426 ro->ro_bkt = sc->sc_stride;
1427 ro->ro_flapping = sc->sc_flapping;
1428 ro->ro_flowid_shift = sc->flowid_shift;
1429 LAGG_XUNLOCK(sc);
1430 break;
1431 case SIOCSLAGGOPTS:
1432 error = priv_check(td, PRIV_NET_LAGG);
1433 if (error)
1434 break;
1435
1436 /*
1437 * The stride option was added without defining a corresponding
1438 * LAGG_OPT flag, so handle a non-zero value before checking
1439 * anything else to preserve compatibility.
1440 */
1441 LAGG_XLOCK(sc);
1442 if (ro->ro_opts == 0 && ro->ro_bkt != 0) {
1443 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN) {
1444 LAGG_XUNLOCK(sc);
1445 error = EINVAL;
1446 break;
1447 }
1448 sc->sc_stride = ro->ro_bkt;
1449 }
1450 if (ro->ro_opts == 0) {
1451 LAGG_XUNLOCK(sc);
1452 break;
1453 }
1454
1455 /*
1456 * Set options. LACP options are stored in sc->sc_psc,
1457 * not in sc_opts.
1458 */
1459 int valid, lacp;
1460
1461 switch (ro->ro_opts) {
1462 case LAGG_OPT_USE_FLOWID:
1463 case -LAGG_OPT_USE_FLOWID:
1464 case LAGG_OPT_USE_NUMA:
1465 case -LAGG_OPT_USE_NUMA:
1466 case LAGG_OPT_FLOWIDSHIFT:
1467 case LAGG_OPT_RR_LIMIT:
1468 valid = 1;
1469 lacp = 0;
1470 break;
1471 case LAGG_OPT_LACP_TXTEST:
1472 case -LAGG_OPT_LACP_TXTEST:
1473 case LAGG_OPT_LACP_RXTEST:
1474 case -LAGG_OPT_LACP_RXTEST:
1475 case LAGG_OPT_LACP_STRICT:
1476 case -LAGG_OPT_LACP_STRICT:
1477 case LAGG_OPT_LACP_FAST_TIMO:
1478 case -LAGG_OPT_LACP_FAST_TIMO:
1479 valid = lacp = 1;
1480 break;
1481 default:
1482 valid = lacp = 0;
1483 break;
1484 }
1485
1486 if (valid == 0 ||
1487 (lacp == 1 && sc->sc_proto != LAGG_PROTO_LACP)) {
1488 /* Invalid combination of options specified. */
1489 error = EINVAL;
1490 LAGG_XUNLOCK(sc);
1491 break; /* Return from SIOCSLAGGOPTS. */
1492 }
1493
1494 /*
1495 * Store new options into sc->sc_opts except for
1496 * FLOWIDSHIFT, RR and LACP options.
1497 */
1498 if (lacp == 0) {
1499 if (ro->ro_opts == LAGG_OPT_FLOWIDSHIFT)
1500 sc->flowid_shift = ro->ro_flowid_shift;
1501 else if (ro->ro_opts == LAGG_OPT_RR_LIMIT) {
1502 if (sc->sc_proto != LAGG_PROTO_ROUNDROBIN ||
1503 ro->ro_bkt == 0) {
1504 error = EINVAL;
1505 LAGG_XUNLOCK(sc);
1506 break;
1507 }
1508 sc->sc_stride = ro->ro_bkt;
1509 } else if (ro->ro_opts > 0)
1510 sc->sc_opts |= ro->ro_opts;
1511 else
1512 sc->sc_opts &= ~ro->ro_opts;
1513 } else {
1514 struct lacp_softc *lsc;
1515 struct lacp_port *lp;
1516
1517 lsc = (struct lacp_softc *)sc->sc_psc;
1518
1519 switch (ro->ro_opts) {
1520 case LAGG_OPT_LACP_TXTEST:
1521 lsc->lsc_debug.lsc_tx_test = 1;
1522 break;
1523 case -LAGG_OPT_LACP_TXTEST:
1524 lsc->lsc_debug.lsc_tx_test = 0;
1525 break;
1526 case LAGG_OPT_LACP_RXTEST:
1527 lsc->lsc_debug.lsc_rx_test = 1;
1528 break;
1529 case -LAGG_OPT_LACP_RXTEST:
1530 lsc->lsc_debug.lsc_rx_test = 0;
1531 break;
1532 case LAGG_OPT_LACP_STRICT:
1533 lsc->lsc_strict_mode = 1;
1534 break;
1535 case -LAGG_OPT_LACP_STRICT:
1536 lsc->lsc_strict_mode = 0;
1537 break;
1538 case LAGG_OPT_LACP_FAST_TIMO:
1539 LACP_LOCK(lsc);
1540 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1541 lp->lp_state |= LACP_STATE_TIMEOUT;
1542 LACP_UNLOCK(lsc);
1543 lsc->lsc_fast_timeout = 1;
1544 break;
1545 case -LAGG_OPT_LACP_FAST_TIMO:
1546 LACP_LOCK(lsc);
1547 LIST_FOREACH(lp, &lsc->lsc_ports, lp_next)
1548 lp->lp_state &= ~LACP_STATE_TIMEOUT;
1549 LACP_UNLOCK(lsc);
1550 lsc->lsc_fast_timeout = 0;
1551 break;
1552 }
1553 }
1554 LAGG_XUNLOCK(sc);
1555 break;
1556 case SIOCGLAGGFLAGS:
1557 rf->rf_flags = 0;
1558 LAGG_XLOCK(sc);
1559 if (sc->sc_flags & MBUF_HASHFLAG_L2)
1560 rf->rf_flags |= LAGG_F_HASHL2;
1561 if (sc->sc_flags & MBUF_HASHFLAG_L3)
1562 rf->rf_flags |= LAGG_F_HASHL3;
1563 if (sc->sc_flags & MBUF_HASHFLAG_L4)
1564 rf->rf_flags |= LAGG_F_HASHL4;
1565 LAGG_XUNLOCK(sc);
1566 break;
1567 case SIOCSLAGGHASH:
1568 error = priv_check(td, PRIV_NET_LAGG);
1569 if (error)
1570 break;
1571 if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) {
1572 error = EINVAL;
1573 break;
1574 }
1575 LAGG_XLOCK(sc);
1576 sc->sc_flags = 0;
1577 if (rf->rf_flags & LAGG_F_HASHL2)
1578 sc->sc_flags |= MBUF_HASHFLAG_L2;
1579 if (rf->rf_flags & LAGG_F_HASHL3)
1580 sc->sc_flags |= MBUF_HASHFLAG_L3;
1581 if (rf->rf_flags & LAGG_F_HASHL4)
1582 sc->sc_flags |= MBUF_HASHFLAG_L4;
1583 LAGG_XUNLOCK(sc);
1584 break;
1585 case SIOCGLAGGPORT:
1586 if (rp->rp_portname[0] == '\0' ||
1587 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1588 error = EINVAL;
1589 break;
1590 }
1591
1592 LAGG_SLOCK(sc);
1593 if (__predict_true((lp = tpif->if_lagg) != NULL &&
1594 lp->lp_softc == sc))
1595 lagg_port2req(lp, rp);
1596 else
1597 error = ENOENT; /* XXXGL: can happen? */
1598 LAGG_SUNLOCK(sc);
1599 if_rele(tpif);
1600 break;
1601
1602 case SIOCSLAGGPORT:
1603 error = priv_check(td, PRIV_NET_LAGG);
1604 if (error)
1605 break;
1606 if (rp->rp_portname[0] == '\0' ||
1607 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1608 error = EINVAL;
1609 break;
1610 }
1611 #ifdef INET6
1612 /*
1613 * A laggport interface should not have inet6 address
1614 * because two interfaces with a valid link-local
1615 * scope zone must not be merged in any form. This
1616 * restriction is needed to prevent violation of
1617 * link-local scope zone. Attempts to add a laggport
1618 * interface which has inet6 addresses triggers
1619 * removal of all inet6 addresses on the member
1620 * interface.
1621 */
1622 if (in6ifa_llaonifp(tpif)) {
1623 in6_ifdetach(tpif);
1624 if_printf(sc->sc_ifp,
1625 "IPv6 addresses on %s have been removed "
1626 "before adding it as a member to prevent "
1627 "IPv6 address scope violation.\n",
1628 tpif->if_xname);
1629 }
1630 #endif
1631 oldmtu = ifp->if_mtu;
1632 LAGG_XLOCK(sc);
1633 error = lagg_port_create(sc, tpif);
1634 LAGG_XUNLOCK(sc);
1635 if_rele(tpif);
1636
1637 /*
1638 * LAGG MTU may change during addition of the first port.
1639 * If it did, do network layer specific procedure.
1640 */
1641 if (ifp->if_mtu != oldmtu)
1642 if_notifymtu(ifp);
1643
1644 VLAN_CAPABILITIES(ifp);
1645 break;
1646 case SIOCSLAGGDELPORT:
1647 error = priv_check(td, PRIV_NET_LAGG);
1648 if (error)
1649 break;
1650 if (rp->rp_portname[0] == '\0' ||
1651 (tpif = ifunit_ref(rp->rp_portname)) == NULL) {
1652 error = EINVAL;
1653 break;
1654 }
1655
1656 LAGG_XLOCK(sc);
1657 if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL ||
1658 lp->lp_softc != sc) {
1659 error = ENOENT;
1660 LAGG_XUNLOCK(sc);
1661 if_rele(tpif);
1662 break;
1663 }
1664
1665 error = lagg_port_destroy(lp, 1);
1666 LAGG_XUNLOCK(sc);
1667 if_rele(tpif);
1668 VLAN_CAPABILITIES(ifp);
1669 break;
1670 case SIOCSIFFLAGS:
1671 /* Set flags on ports too */
1672 LAGG_XLOCK(sc);
1673 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1674 lagg_setflags(lp, 1);
1675 }
1676
1677 if (!(ifp->if_flags & IFF_UP) &&
1678 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1679 /*
1680 * If interface is marked down and it is running,
1681 * then stop and disable it.
1682 */
1683 lagg_stop(sc);
1684 LAGG_XUNLOCK(sc);
1685 } else if ((ifp->if_flags & IFF_UP) &&
1686 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1687 /*
1688 * If interface is marked up and it is stopped, then
1689 * start it.
1690 */
1691 LAGG_XUNLOCK(sc);
1692 (*ifp->if_init)(sc);
1693 } else
1694 LAGG_XUNLOCK(sc);
1695 break;
1696 case SIOCADDMULTI:
1697 case SIOCDELMULTI:
1698 LAGG_XLOCK(sc);
1699 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1700 lagg_clrmulti(lp);
1701 lagg_setmulti(lp);
1702 }
1703 LAGG_XUNLOCK(sc);
1704 error = 0;
1705 break;
1706 case SIOCSIFMEDIA:
1707 case SIOCGIFMEDIA:
1708 if (ifp->if_type == IFT_INFINIBAND)
1709 error = EINVAL;
1710 else
1711 error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd);
1712 break;
1713
1714 case SIOCSIFCAP:
1715 case SIOCSIFCAPNV:
1716 LAGG_XLOCK(sc);
1717 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1718 if (lp->lp_ioctl != NULL)
1719 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1720 }
1721 lagg_capabilities(sc);
1722 LAGG_XUNLOCK(sc);
1723 VLAN_CAPABILITIES(ifp);
1724 error = 0;
1725 break;
1726
1727 case SIOCGIFCAPNV:
1728 error = 0;
1729 break;
1730
1731 case SIOCSIFMTU:
1732 LAGG_XLOCK(sc);
1733 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1734 if (lp->lp_ioctl != NULL)
1735 error = (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1736 else
1737 error = EINVAL;
1738 if (error != 0) {
1739 if_printf(ifp,
1740 "failed to change MTU to %d on port %s, "
1741 "reverting all ports to original MTU (%d)\n",
1742 ifr->ifr_mtu, lp->lp_ifp->if_xname, ifp->if_mtu);
1743 break;
1744 }
1745 }
1746 if (error == 0) {
1747 ifp->if_mtu = ifr->ifr_mtu;
1748 } else {
1749 /* set every port back to the original MTU */
1750 ifr->ifr_mtu = ifp->if_mtu;
1751 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
1752 if (lp->lp_ioctl != NULL)
1753 (*lp->lp_ioctl)(lp->lp_ifp, cmd, data);
1754 }
1755 }
1756 lagg_capabilities(sc);
1757 LAGG_XUNLOCK(sc);
1758 VLAN_CAPABILITIES(ifp);
1759 break;
1760
1761 default:
1762 error = ether_ioctl(ifp, cmd, data);
1763 break;
1764 }
1765 return (error);
1766 }
1767
1768 #if defined(KERN_TLS) || defined(RATELIMIT)
1769 #ifdef RATELIMIT
1770 static const struct if_snd_tag_sw lagg_snd_tag_ul_sw = {
1771 .snd_tag_modify = lagg_snd_tag_modify,
1772 .snd_tag_query = lagg_snd_tag_query,
1773 .snd_tag_free = lagg_snd_tag_free,
1774 .next_snd_tag = lagg_next_snd_tag,
1775 .type = IF_SND_TAG_TYPE_UNLIMITED
1776 };
1777
1778 static const struct if_snd_tag_sw lagg_snd_tag_rl_sw = {
1779 .snd_tag_modify = lagg_snd_tag_modify,
1780 .snd_tag_query = lagg_snd_tag_query,
1781 .snd_tag_free = lagg_snd_tag_free,
1782 .next_snd_tag = lagg_next_snd_tag,
1783 .type = IF_SND_TAG_TYPE_RATE_LIMIT
1784 };
1785 #endif
1786
1787 #ifdef KERN_TLS
1788 static const struct if_snd_tag_sw lagg_snd_tag_tls_sw = {
1789 .snd_tag_modify = lagg_snd_tag_modify,
1790 .snd_tag_query = lagg_snd_tag_query,
1791 .snd_tag_free = lagg_snd_tag_free,
1792 .next_snd_tag = lagg_next_snd_tag,
1793 .type = IF_SND_TAG_TYPE_TLS
1794 };
1795
1796 #ifdef RATELIMIT
1797 static const struct if_snd_tag_sw lagg_snd_tag_tls_rl_sw = {
1798 .snd_tag_modify = lagg_snd_tag_modify,
1799 .snd_tag_query = lagg_snd_tag_query,
1800 .snd_tag_free = lagg_snd_tag_free,
1801 .next_snd_tag = lagg_next_snd_tag,
1802 .type = IF_SND_TAG_TYPE_TLS_RATE_LIMIT
1803 };
1804 #endif
1805 #endif
1806
1807 static inline struct lagg_snd_tag *
mst_to_lst(struct m_snd_tag * mst)1808 mst_to_lst(struct m_snd_tag *mst)
1809 {
1810
1811 return (__containerof(mst, struct lagg_snd_tag, com));
1812 }
1813
1814 /*
1815 * Look up the port used by a specific flow. This only works for lagg
1816 * protocols with deterministic port mappings (e.g. not roundrobin).
1817 * In addition protocols which use a hash to map flows to ports must
1818 * be configured to use the mbuf flowid rather than hashing packet
1819 * contents.
1820 */
1821 static struct lagg_port *
lookup_snd_tag_port(struct ifnet * ifp,uint32_t flowid,uint32_t flowtype,uint8_t numa_domain)1822 lookup_snd_tag_port(struct ifnet *ifp, uint32_t flowid, uint32_t flowtype,
1823 uint8_t numa_domain)
1824 {
1825 struct lagg_softc *sc;
1826 struct lagg_port *lp;
1827 struct lagg_lb *lb;
1828 uint32_t hash, p;
1829 int err;
1830
1831 sc = ifp->if_softc;
1832
1833 switch (sc->sc_proto) {
1834 case LAGG_PROTO_FAILOVER:
1835 return (lagg_link_active(sc, sc->sc_primary));
1836 case LAGG_PROTO_LOADBALANCE:
1837 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
1838 flowtype == M_HASHTYPE_NONE)
1839 return (NULL);
1840 p = flowid >> sc->flowid_shift;
1841 p %= sc->sc_count;
1842 lb = (struct lagg_lb *)sc->sc_psc;
1843 lp = lb->lb_ports[p];
1844 return (lagg_link_active(sc, lp));
1845 case LAGG_PROTO_LACP:
1846 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) == 0 ||
1847 flowtype == M_HASHTYPE_NONE)
1848 return (NULL);
1849 hash = flowid >> sc->flowid_shift;
1850 return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, &err));
1851 default:
1852 return (NULL);
1853 }
1854 }
1855
1856 static int
lagg_snd_tag_alloc(struct ifnet * ifp,union if_snd_tag_alloc_params * params,struct m_snd_tag ** ppmt)1857 lagg_snd_tag_alloc(struct ifnet *ifp,
1858 union if_snd_tag_alloc_params *params,
1859 struct m_snd_tag **ppmt)
1860 {
1861 struct epoch_tracker et;
1862 const struct if_snd_tag_sw *sw;
1863 struct lagg_snd_tag *lst;
1864 struct lagg_port *lp;
1865 struct ifnet *lp_ifp;
1866 struct m_snd_tag *mst;
1867 int error;
1868
1869 switch (params->hdr.type) {
1870 #ifdef RATELIMIT
1871 case IF_SND_TAG_TYPE_UNLIMITED:
1872 sw = &lagg_snd_tag_ul_sw;
1873 break;
1874 case IF_SND_TAG_TYPE_RATE_LIMIT:
1875 sw = &lagg_snd_tag_rl_sw;
1876 break;
1877 #endif
1878 #ifdef KERN_TLS
1879 case IF_SND_TAG_TYPE_TLS:
1880 sw = &lagg_snd_tag_tls_sw;
1881 break;
1882 case IF_SND_TAG_TYPE_TLS_RX:
1883 /* Return tag from port interface directly. */
1884 sw = NULL;
1885 break;
1886 #ifdef RATELIMIT
1887 case IF_SND_TAG_TYPE_TLS_RATE_LIMIT:
1888 sw = &lagg_snd_tag_tls_rl_sw;
1889 break;
1890 #endif
1891 #endif
1892 default:
1893 return (EOPNOTSUPP);
1894 }
1895
1896 NET_EPOCH_ENTER(et);
1897 lp = lookup_snd_tag_port(ifp, params->hdr.flowid,
1898 params->hdr.flowtype, params->hdr.numa_domain);
1899 if (lp == NULL) {
1900 NET_EPOCH_EXIT(et);
1901 return (EOPNOTSUPP);
1902 }
1903 if (lp->lp_ifp == NULL) {
1904 NET_EPOCH_EXIT(et);
1905 return (EOPNOTSUPP);
1906 }
1907 lp_ifp = lp->lp_ifp;
1908 if_ref(lp_ifp);
1909 NET_EPOCH_EXIT(et);
1910
1911 if (sw != NULL) {
1912 lst = malloc(sizeof(*lst), M_LAGG, M_NOWAIT);
1913 if (lst == NULL) {
1914 if_rele(lp_ifp);
1915 return (ENOMEM);
1916 }
1917 } else
1918 lst = NULL;
1919
1920 error = m_snd_tag_alloc(lp_ifp, params, &mst);
1921 if_rele(lp_ifp);
1922 if (error) {
1923 free(lst, M_LAGG);
1924 return (error);
1925 }
1926
1927 if (sw != NULL) {
1928 m_snd_tag_init(&lst->com, ifp, sw);
1929 lst->tag = mst;
1930
1931 *ppmt = &lst->com;
1932 } else
1933 *ppmt = mst;
1934
1935 return (0);
1936 }
1937
1938 static struct m_snd_tag *
lagg_next_snd_tag(struct m_snd_tag * mst)1939 lagg_next_snd_tag(struct m_snd_tag *mst)
1940 {
1941 struct lagg_snd_tag *lst;
1942
1943 lst = mst_to_lst(mst);
1944 return (lst->tag);
1945 }
1946
1947 static int
lagg_snd_tag_modify(struct m_snd_tag * mst,union if_snd_tag_modify_params * params)1948 lagg_snd_tag_modify(struct m_snd_tag *mst,
1949 union if_snd_tag_modify_params *params)
1950 {
1951 struct lagg_snd_tag *lst;
1952
1953 lst = mst_to_lst(mst);
1954 return (lst->tag->sw->snd_tag_modify(lst->tag, params));
1955 }
1956
1957 static int
lagg_snd_tag_query(struct m_snd_tag * mst,union if_snd_tag_query_params * params)1958 lagg_snd_tag_query(struct m_snd_tag *mst,
1959 union if_snd_tag_query_params *params)
1960 {
1961 struct lagg_snd_tag *lst;
1962
1963 lst = mst_to_lst(mst);
1964 return (lst->tag->sw->snd_tag_query(lst->tag, params));
1965 }
1966
1967 static void
lagg_snd_tag_free(struct m_snd_tag * mst)1968 lagg_snd_tag_free(struct m_snd_tag *mst)
1969 {
1970 struct lagg_snd_tag *lst;
1971
1972 lst = mst_to_lst(mst);
1973 m_snd_tag_rele(lst->tag);
1974 free(lst, M_LAGG);
1975 }
1976
1977 static void
lagg_ratelimit_query(struct ifnet * ifp __unused,struct if_ratelimit_query_results * q)1978 lagg_ratelimit_query(struct ifnet *ifp __unused, struct if_ratelimit_query_results *q)
1979 {
1980 /*
1981 * For lagg, we have an indirect
1982 * interface. The caller needs to
1983 * get a ratelimit tag on the actual
1984 * interface the flow will go on.
1985 */
1986 q->rate_table = NULL;
1987 q->flags = RT_IS_INDIRECT;
1988 q->max_flows = 0;
1989 q->number_of_rates = 0;
1990 }
1991 #endif
1992
1993 static int
lagg_setmulti(struct lagg_port * lp)1994 lagg_setmulti(struct lagg_port *lp)
1995 {
1996 struct lagg_softc *sc = lp->lp_softc;
1997 struct ifnet *ifp = lp->lp_ifp;
1998 struct ifnet *scifp = sc->sc_ifp;
1999 struct lagg_mc *mc;
2000 struct ifmultiaddr *ifma;
2001 int error;
2002
2003 IF_ADDR_WLOCK(scifp);
2004 CK_STAILQ_FOREACH(ifma, &scifp->if_multiaddrs, ifma_link) {
2005 if (ifma->ifma_addr->sa_family != AF_LINK)
2006 continue;
2007 mc = malloc(sizeof(struct lagg_mc), M_LAGG, M_NOWAIT);
2008 if (mc == NULL) {
2009 IF_ADDR_WUNLOCK(scifp);
2010 return (ENOMEM);
2011 }
2012 bcopy(ifma->ifma_addr, &mc->mc_addr, ifma->ifma_addr->sa_len);
2013 mc->mc_addr.sdl_index = ifp->if_index;
2014 mc->mc_ifma = NULL;
2015 SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries);
2016 }
2017 IF_ADDR_WUNLOCK(scifp);
2018 SLIST_FOREACH (mc, &lp->lp_mc_head, mc_entries) {
2019 error = if_addmulti(ifp,
2020 (struct sockaddr *)&mc->mc_addr, &mc->mc_ifma);
2021 if (error)
2022 return (error);
2023 }
2024 return (0);
2025 }
2026
2027 static int
lagg_clrmulti(struct lagg_port * lp)2028 lagg_clrmulti(struct lagg_port *lp)
2029 {
2030 struct lagg_mc *mc;
2031
2032 LAGG_XLOCK_ASSERT(lp->lp_softc);
2033 while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) {
2034 SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries);
2035 if (mc->mc_ifma && lp->lp_detaching == 0)
2036 if_delmulti_ifma(mc->mc_ifma);
2037 free(mc, M_LAGG);
2038 }
2039 return (0);
2040 }
2041
2042 static void
lagg_setcaps(struct lagg_port * lp,int cap,int cap2)2043 lagg_setcaps(struct lagg_port *lp, int cap, int cap2)
2044 {
2045 struct ifreq ifr;
2046 struct siocsifcapnv_driver_data drv_ioctl_data;
2047
2048 if (lp->lp_ifp->if_capenable == cap &&
2049 lp->lp_ifp->if_capenable2 == cap2)
2050 return;
2051 if (lp->lp_ioctl == NULL)
2052 return;
2053 /* XXX */
2054 if ((lp->lp_ifp->if_capabilities & IFCAP_NV) != 0) {
2055 drv_ioctl_data.reqcap = cap;
2056 drv_ioctl_data.reqcap2 = cap2;
2057 drv_ioctl_data.nvcap = NULL;
2058 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAPNV,
2059 (caddr_t)&drv_ioctl_data);
2060 } else {
2061 ifr.ifr_reqcap = cap;
2062 (*lp->lp_ioctl)(lp->lp_ifp, SIOCSIFCAP, (caddr_t)&ifr);
2063 }
2064 }
2065
2066 /* Handle a ref counted flag that should be set on the lagg port as well */
2067 static int
lagg_setflag(struct lagg_port * lp,int flag,int status,int (* func)(struct ifnet *,int))2068 lagg_setflag(struct lagg_port *lp, int flag, int status,
2069 int (*func)(struct ifnet *, int))
2070 {
2071 struct lagg_softc *sc = lp->lp_softc;
2072 struct ifnet *scifp = sc->sc_ifp;
2073 struct ifnet *ifp = lp->lp_ifp;
2074 int error;
2075
2076 LAGG_XLOCK_ASSERT(sc);
2077
2078 status = status ? (scifp->if_flags & flag) : 0;
2079 /* Now "status" contains the flag value or 0 */
2080
2081 /*
2082 * See if recorded ports status is different from what
2083 * we want it to be. If it is, flip it. We record ports
2084 * status in lp_ifflags so that we won't clear ports flag
2085 * we haven't set. In fact, we don't clear or set ports
2086 * flags directly, but get or release references to them.
2087 * That's why we can be sure that recorded flags still are
2088 * in accord with actual ports flags.
2089 */
2090 if (status != (lp->lp_ifflags & flag)) {
2091 error = (*func)(ifp, status);
2092 if (error)
2093 return (error);
2094 lp->lp_ifflags &= ~flag;
2095 lp->lp_ifflags |= status;
2096 }
2097 return (0);
2098 }
2099
2100 /*
2101 * Handle IFF_* flags that require certain changes on the lagg port
2102 * if "status" is true, update ports flags respective to the lagg
2103 * if "status" is false, forcedly clear the flags set on port.
2104 */
2105 static int
lagg_setflags(struct lagg_port * lp,int status)2106 lagg_setflags(struct lagg_port *lp, int status)
2107 {
2108 int error, i;
2109
2110 for (i = 0; lagg_pflags[i].flag; i++) {
2111 error = lagg_setflag(lp, lagg_pflags[i].flag,
2112 status, lagg_pflags[i].func);
2113 if (error)
2114 return (error);
2115 }
2116 return (0);
2117 }
2118
2119 static int
lagg_transmit_ethernet(struct ifnet * ifp,struct mbuf * m)2120 lagg_transmit_ethernet(struct ifnet *ifp, struct mbuf *m)
2121 {
2122 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2123
2124 NET_EPOCH_ASSERT();
2125 #if defined(KERN_TLS) || defined(RATELIMIT)
2126 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG)
2127 MPASS(m->m_pkthdr.snd_tag->ifp == ifp);
2128 #endif
2129 /* We need a Tx algorithm and at least one port */
2130 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
2131 m_freem(m);
2132 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2133 return (ENXIO);
2134 }
2135
2136 ETHER_BPF_MTAP(ifp, m);
2137
2138 return (lagg_proto_start(sc, m));
2139 }
2140
2141 static int
lagg_transmit_infiniband(struct ifnet * ifp,struct mbuf * m)2142 lagg_transmit_infiniband(struct ifnet *ifp, struct mbuf *m)
2143 {
2144 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2145
2146 NET_EPOCH_ASSERT();
2147 #if defined(KERN_TLS) || defined(RATELIMIT)
2148 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG)
2149 MPASS(m->m_pkthdr.snd_tag->ifp == ifp);
2150 #endif
2151 /* We need a Tx algorithm and at least one port */
2152 if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) {
2153 m_freem(m);
2154 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
2155 return (ENXIO);
2156 }
2157
2158 infiniband_bpf_mtap(ifp, m);
2159
2160 return (lagg_proto_start(sc, m));
2161 }
2162
2163 /*
2164 * The ifp->if_qflush entry point for lagg(4) is no-op.
2165 */
2166 static void
lagg_qflush(struct ifnet * ifp __unused)2167 lagg_qflush(struct ifnet *ifp __unused)
2168 {
2169 }
2170
2171 static struct mbuf *
lagg_input_ethernet(struct ifnet * ifp,struct mbuf * m)2172 lagg_input_ethernet(struct ifnet *ifp, struct mbuf *m)
2173 {
2174 struct lagg_port *lp = ifp->if_lagg;
2175 struct lagg_softc *sc = lp->lp_softc;
2176 struct ifnet *scifp = sc->sc_ifp;
2177
2178 NET_EPOCH_ASSERT();
2179 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
2180 lp->lp_detaching != 0 ||
2181 sc->sc_proto == LAGG_PROTO_NONE) {
2182 m_freem(m);
2183 return (NULL);
2184 }
2185
2186 m = lagg_proto_input(sc, lp, m);
2187 if (m != NULL) {
2188 ETHER_BPF_MTAP(scifp, m);
2189
2190 if ((scifp->if_flags & IFF_MONITOR) != 0) {
2191 m_freem(m);
2192 m = NULL;
2193 }
2194 }
2195
2196 #ifdef DEV_NETMAP
2197 if (m != NULL && scifp->if_capenable & IFCAP_NETMAP) {
2198 scifp->if_input(scifp, m);
2199 m = NULL;
2200 }
2201 #endif /* DEV_NETMAP */
2202
2203 return (m);
2204 }
2205
2206 static struct mbuf *
lagg_input_infiniband(struct ifnet * ifp,struct mbuf * m)2207 lagg_input_infiniband(struct ifnet *ifp, struct mbuf *m)
2208 {
2209 struct lagg_port *lp = ifp->if_lagg;
2210 struct lagg_softc *sc = lp->lp_softc;
2211 struct ifnet *scifp = sc->sc_ifp;
2212
2213 NET_EPOCH_ASSERT();
2214 if ((scifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
2215 lp->lp_detaching != 0 ||
2216 sc->sc_proto == LAGG_PROTO_NONE) {
2217 m_freem(m);
2218 return (NULL);
2219 }
2220
2221 m = lagg_proto_input(sc, lp, m);
2222 if (m != NULL) {
2223 infiniband_bpf_mtap(scifp, m);
2224
2225 if ((scifp->if_flags & IFF_MONITOR) != 0) {
2226 m_freem(m);
2227 m = NULL;
2228 }
2229 }
2230
2231 return (m);
2232 }
2233
2234 static int
lagg_media_change(struct ifnet * ifp)2235 lagg_media_change(struct ifnet *ifp)
2236 {
2237 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2238
2239 if (sc->sc_ifflags & IFF_DEBUG)
2240 printf("%s\n", __func__);
2241
2242 /* Ignore */
2243 return (0);
2244 }
2245
2246 static void
lagg_media_status(struct ifnet * ifp,struct ifmediareq * imr)2247 lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2248 {
2249 struct epoch_tracker et;
2250 struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc;
2251 struct lagg_port *lp;
2252
2253 imr->ifm_status = IFM_AVALID;
2254 imr->ifm_active = IFM_ETHER | IFM_AUTO;
2255
2256 NET_EPOCH_ENTER(et);
2257 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2258 if (LAGG_PORTACTIVE(lp))
2259 imr->ifm_status |= IFM_ACTIVE;
2260 }
2261 NET_EPOCH_EXIT(et);
2262 }
2263
2264 static void
lagg_linkstate(struct lagg_softc * sc)2265 lagg_linkstate(struct lagg_softc *sc)
2266 {
2267 struct epoch_tracker et;
2268 struct lagg_port *lp;
2269 int new_link = LINK_STATE_DOWN;
2270 uint64_t speed;
2271
2272 LAGG_XLOCK_ASSERT(sc);
2273
2274 /* LACP handles link state itself */
2275 if (sc->sc_proto == LAGG_PROTO_LACP)
2276 return;
2277
2278 /* Our link is considered up if at least one of our ports is active */
2279 NET_EPOCH_ENTER(et);
2280 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2281 if (lp->lp_ifp->if_link_state == LINK_STATE_UP) {
2282 new_link = LINK_STATE_UP;
2283 break;
2284 }
2285 }
2286 NET_EPOCH_EXIT(et);
2287 if_link_state_change(sc->sc_ifp, new_link);
2288
2289 /* Update if_baudrate to reflect the max possible speed */
2290 switch (sc->sc_proto) {
2291 case LAGG_PROTO_FAILOVER:
2292 sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ?
2293 sc->sc_primary->lp_ifp->if_baudrate : 0;
2294 break;
2295 case LAGG_PROTO_ROUNDROBIN:
2296 case LAGG_PROTO_LOADBALANCE:
2297 case LAGG_PROTO_BROADCAST:
2298 speed = 0;
2299 NET_EPOCH_ENTER(et);
2300 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2301 speed += lp->lp_ifp->if_baudrate;
2302 NET_EPOCH_EXIT(et);
2303 sc->sc_ifp->if_baudrate = speed;
2304 break;
2305 case LAGG_PROTO_LACP:
2306 /* LACP updates if_baudrate itself */
2307 break;
2308 }
2309 }
2310
2311 static void
lagg_port_state(struct ifnet * ifp,int state)2312 lagg_port_state(struct ifnet *ifp, int state)
2313 {
2314 struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg;
2315 struct lagg_softc *sc = NULL;
2316
2317 if (lp != NULL)
2318 sc = lp->lp_softc;
2319 if (sc == NULL)
2320 return;
2321
2322 LAGG_XLOCK(sc);
2323 lagg_linkstate(sc);
2324 lagg_proto_linkstate(sc, lp);
2325 LAGG_XUNLOCK(sc);
2326 }
2327
2328 struct lagg_port *
lagg_link_active(struct lagg_softc * sc,struct lagg_port * lp)2329 lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp)
2330 {
2331 struct lagg_port *lp_next, *rval = NULL;
2332
2333 /*
2334 * Search a port which reports an active link state.
2335 */
2336
2337 #ifdef INVARIANTS
2338 /*
2339 * This is called with either in the network epoch
2340 * or with LAGG_XLOCK(sc) held.
2341 */
2342 if (!in_epoch(net_epoch_preempt))
2343 LAGG_XLOCK_ASSERT(sc);
2344 #endif
2345
2346 if (lp == NULL)
2347 goto search;
2348 if (LAGG_PORTACTIVE(lp)) {
2349 rval = lp;
2350 goto found;
2351 }
2352 if ((lp_next = CK_SLIST_NEXT(lp, lp_entries)) != NULL &&
2353 LAGG_PORTACTIVE(lp_next)) {
2354 rval = lp_next;
2355 goto found;
2356 }
2357
2358 search:
2359 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2360 if (LAGG_PORTACTIVE(lp_next)) {
2361 return (lp_next);
2362 }
2363 }
2364 found:
2365 return (rval);
2366 }
2367
2368 int
lagg_enqueue(struct ifnet * ifp,struct mbuf * m)2369 lagg_enqueue(struct ifnet *ifp, struct mbuf *m)
2370 {
2371
2372 #if defined(KERN_TLS) || defined(RATELIMIT)
2373 if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) {
2374 struct lagg_snd_tag *lst;
2375 struct m_snd_tag *mst;
2376
2377 mst = m->m_pkthdr.snd_tag;
2378 lst = mst_to_lst(mst);
2379 if (lst->tag->ifp != ifp) {
2380 m_freem(m);
2381 return (EAGAIN);
2382 }
2383 m->m_pkthdr.snd_tag = m_snd_tag_ref(lst->tag);
2384 m_snd_tag_rele(mst);
2385 }
2386 #endif
2387 return (ifp->if_transmit)(ifp, m);
2388 }
2389
2390 /*
2391 * Simple round robin aggregation
2392 */
2393 static void
lagg_rr_attach(struct lagg_softc * sc)2394 lagg_rr_attach(struct lagg_softc *sc)
2395 {
2396 sc->sc_seq = 0;
2397 sc->sc_stride = 1;
2398 }
2399
2400 static int
lagg_rr_start(struct lagg_softc * sc,struct mbuf * m)2401 lagg_rr_start(struct lagg_softc *sc, struct mbuf *m)
2402 {
2403 struct lagg_port *lp;
2404 uint32_t p;
2405
2406 p = atomic_fetchadd_32(&sc->sc_seq, 1);
2407 p /= sc->sc_stride;
2408 p %= sc->sc_count;
2409 lp = CK_SLIST_FIRST(&sc->sc_ports);
2410
2411 while (p--)
2412 lp = CK_SLIST_NEXT(lp, lp_entries);
2413
2414 /*
2415 * Check the port's link state. This will return the next active
2416 * port if the link is down or the port is NULL.
2417 */
2418 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2419 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2420 m_freem(m);
2421 return (ENETDOWN);
2422 }
2423
2424 /* Send mbuf */
2425 return (lagg_enqueue(lp->lp_ifp, m));
2426 }
2427
2428 /*
2429 * Broadcast mode
2430 */
2431 static int
lagg_bcast_start(struct lagg_softc * sc,struct mbuf * m)2432 lagg_bcast_start(struct lagg_softc *sc, struct mbuf *m)
2433 {
2434 int errors = 0;
2435 int ret;
2436 struct lagg_port *lp, *last = NULL;
2437 struct mbuf *m0;
2438
2439 NET_EPOCH_ASSERT();
2440 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) {
2441 if (!LAGG_PORTACTIVE(lp))
2442 continue;
2443
2444 if (last != NULL) {
2445 m0 = m_copym(m, 0, M_COPYALL, M_NOWAIT);
2446 if (m0 == NULL) {
2447 ret = ENOBUFS;
2448 errors++;
2449 break;
2450 }
2451 lagg_enqueue(last->lp_ifp, m0);
2452 }
2453 last = lp;
2454 }
2455
2456 if (last == NULL) {
2457 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2458 m_freem(m);
2459 return (ENOENT);
2460 }
2461 if ((last = lagg_link_active(sc, last)) == NULL) {
2462 errors++;
2463 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors);
2464 m_freem(m);
2465 return (ENETDOWN);
2466 }
2467
2468 ret = lagg_enqueue(last->lp_ifp, m);
2469 if (errors != 0)
2470 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, errors);
2471
2472 return (ret);
2473 }
2474
2475 /*
2476 * Active failover
2477 */
2478 static int
lagg_fail_start(struct lagg_softc * sc,struct mbuf * m)2479 lagg_fail_start(struct lagg_softc *sc, struct mbuf *m)
2480 {
2481 struct lagg_port *lp;
2482
2483 /* Use the master port if active or the next available port */
2484 if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) {
2485 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2486 m_freem(m);
2487 return (ENETDOWN);
2488 }
2489
2490 /* Send mbuf */
2491 return (lagg_enqueue(lp->lp_ifp, m));
2492 }
2493
2494 static struct mbuf *
lagg_fail_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2495 lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2496 {
2497 struct ifnet *ifp = sc->sc_ifp;
2498 struct lagg_port *tmp_tp;
2499
2500 if (lp == sc->sc_primary || V_lagg_failover_rx_all) {
2501 m->m_pkthdr.rcvif = ifp;
2502 return (m);
2503 }
2504
2505 if (!LAGG_PORTACTIVE(sc->sc_primary)) {
2506 tmp_tp = lagg_link_active(sc, sc->sc_primary);
2507 /*
2508 * If tmp_tp is null, we've received a packet when all
2509 * our links are down. Weird, but process it anyways.
2510 */
2511 if (tmp_tp == NULL || tmp_tp == lp) {
2512 m->m_pkthdr.rcvif = ifp;
2513 return (m);
2514 }
2515 }
2516
2517 m_freem(m);
2518 return (NULL);
2519 }
2520
2521 /*
2522 * Loadbalancing
2523 */
2524 static void
lagg_lb_attach(struct lagg_softc * sc)2525 lagg_lb_attach(struct lagg_softc *sc)
2526 {
2527 struct lagg_port *lp;
2528 struct lagg_lb *lb;
2529
2530 LAGG_XLOCK_ASSERT(sc);
2531 lb = malloc(sizeof(struct lagg_lb), M_LAGG, M_WAITOK | M_ZERO);
2532 lb->lb_key = m_ether_tcpip_hash_init();
2533 sc->sc_psc = lb;
2534
2535 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2536 lagg_lb_port_create(lp);
2537 }
2538
2539 static void
lagg_lb_detach(struct lagg_softc * sc)2540 lagg_lb_detach(struct lagg_softc *sc)
2541 {
2542 struct lagg_lb *lb;
2543
2544 lb = (struct lagg_lb *)sc->sc_psc;
2545 if (lb != NULL)
2546 free(lb, M_LAGG);
2547 }
2548
2549 static int
lagg_lb_porttable(struct lagg_softc * sc,struct lagg_port * lp)2550 lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp)
2551 {
2552 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2553 struct lagg_port *lp_next;
2554 int i = 0, rv;
2555
2556 rv = 0;
2557 bzero(&lb->lb_ports, sizeof(lb->lb_ports));
2558 LAGG_XLOCK_ASSERT(sc);
2559 CK_SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) {
2560 if (lp_next == lp)
2561 continue;
2562 if (i >= LAGG_MAX_PORTS) {
2563 rv = EINVAL;
2564 break;
2565 }
2566 if (sc->sc_ifflags & IFF_DEBUG)
2567 printf("%s: port %s at index %d\n",
2568 sc->sc_ifname, lp_next->lp_ifp->if_xname, i);
2569 lb->lb_ports[i++] = lp_next;
2570 }
2571
2572 return (rv);
2573 }
2574
2575 static int
lagg_lb_port_create(struct lagg_port * lp)2576 lagg_lb_port_create(struct lagg_port *lp)
2577 {
2578 struct lagg_softc *sc = lp->lp_softc;
2579 return (lagg_lb_porttable(sc, NULL));
2580 }
2581
2582 static void
lagg_lb_port_destroy(struct lagg_port * lp)2583 lagg_lb_port_destroy(struct lagg_port *lp)
2584 {
2585 struct lagg_softc *sc = lp->lp_softc;
2586 lagg_lb_porttable(sc, lp);
2587 }
2588
2589 static int
lagg_lb_start(struct lagg_softc * sc,struct mbuf * m)2590 lagg_lb_start(struct lagg_softc *sc, struct mbuf *m)
2591 {
2592 struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc;
2593 struct lagg_port *lp = NULL;
2594 uint32_t p = 0;
2595
2596 if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
2597 M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
2598 p = m->m_pkthdr.flowid >> sc->flowid_shift;
2599 else
2600 p = m_ether_tcpip_hash(sc->sc_flags, m, lb->lb_key);
2601 p %= sc->sc_count;
2602 lp = lb->lb_ports[p];
2603
2604 /*
2605 * Check the port's link state. This will return the next active
2606 * port if the link is down or the port is NULL.
2607 */
2608 if ((lp = lagg_link_active(sc, lp)) == NULL) {
2609 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2610 m_freem(m);
2611 return (ENETDOWN);
2612 }
2613
2614 /* Send mbuf */
2615 return (lagg_enqueue(lp->lp_ifp, m));
2616 }
2617
2618 /*
2619 * 802.3ad LACP
2620 */
2621 static void
lagg_lacp_attach(struct lagg_softc * sc)2622 lagg_lacp_attach(struct lagg_softc *sc)
2623 {
2624 struct lagg_port *lp;
2625
2626 lacp_attach(sc);
2627 LAGG_XLOCK_ASSERT(sc);
2628 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2629 lacp_port_create(lp);
2630 }
2631
2632 static void
lagg_lacp_detach(struct lagg_softc * sc)2633 lagg_lacp_detach(struct lagg_softc *sc)
2634 {
2635 struct lagg_port *lp;
2636 void *psc;
2637
2638 LAGG_XLOCK_ASSERT(sc);
2639 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2640 lacp_port_destroy(lp);
2641
2642 psc = sc->sc_psc;
2643 sc->sc_psc = NULL;
2644 lacp_detach(psc);
2645 }
2646
2647 static void
lagg_lacp_lladdr(struct lagg_softc * sc)2648 lagg_lacp_lladdr(struct lagg_softc *sc)
2649 {
2650 struct lagg_port *lp;
2651
2652 LAGG_SXLOCK_ASSERT(sc);
2653
2654 /* purge all the lacp ports */
2655 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2656 lacp_port_destroy(lp);
2657
2658 /* add them back in */
2659 CK_SLIST_FOREACH(lp, &sc->sc_ports, lp_entries)
2660 lacp_port_create(lp);
2661 }
2662
2663 static int
lagg_lacp_start(struct lagg_softc * sc,struct mbuf * m)2664 lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m)
2665 {
2666 struct lagg_port *lp;
2667 int err;
2668
2669 lp = lacp_select_tx_port(sc, m, &err);
2670 if (lp == NULL) {
2671 if_inc_counter(sc->sc_ifp, IFCOUNTER_OERRORS, 1);
2672 m_freem(m);
2673 return (err);
2674 }
2675
2676 /* Send mbuf */
2677 return (lagg_enqueue(lp->lp_ifp, m));
2678 }
2679
2680 static struct mbuf *
lagg_lacp_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2681 lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2682 {
2683 struct ifnet *ifp = sc->sc_ifp;
2684 struct ether_header *eh;
2685 u_short etype;
2686
2687 eh = mtod(m, struct ether_header *);
2688 etype = ntohs(eh->ether_type);
2689
2690 /* Tap off LACP control messages */
2691 if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) {
2692 m = lacp_input(lp, m);
2693 if (m == NULL)
2694 return (NULL);
2695 }
2696
2697 /*
2698 * If the port is not collecting or not in the active aggregator then
2699 * free and return.
2700 */
2701 if (!lacp_iscollecting(lp) || !lacp_isactive(lp)) {
2702 m_freem(m);
2703 return (NULL);
2704 }
2705
2706 m->m_pkthdr.rcvif = ifp;
2707 return (m);
2708 }
2709
2710 /* Default input */
2711 static struct mbuf *
lagg_default_input(struct lagg_softc * sc,struct lagg_port * lp,struct mbuf * m)2712 lagg_default_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m)
2713 {
2714 struct ifnet *ifp = sc->sc_ifp;
2715
2716 /* Just pass in the packet to our lagg device */
2717 m->m_pkthdr.rcvif = ifp;
2718
2719 return (m);
2720 }
2721