/* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ */ /* * Copyright (c) 2005, 2006 Reyk Floeter * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include __FBSDID("$FreeBSD$"); #include "opt_inet.h" #include "opt_inet6.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef INET #include #include #include #include #endif #ifdef INET6 #include #endif #include #include #include /* Special flags we should propagate to the lagg ports. */ static struct { int flag; int (*func)(struct ifnet *, int); } lagg_pflags[] = { {IFF_PROMISC, ifpromisc}, {IFF_ALLMULTI, if_allmulti}, {0, NULL} }; SLIST_HEAD(__trhead, lagg_softc) lagg_list; /* list of laggs */ static struct mtx lagg_list_mtx; eventhandler_tag lagg_detach_cookie = NULL; static int lagg_clone_create(struct if_clone *, int, caddr_t); static void lagg_clone_destroy(struct ifnet *); static void lagg_lladdr(struct lagg_softc *, uint8_t *); static int lagg_capabilities(struct lagg_softc *); static void lagg_port_lladdr(struct lagg_port *, uint8_t *); static int lagg_port_create(struct lagg_softc *, struct ifnet *); static int lagg_port_destroy(struct lagg_port *, int); static struct mbuf *lagg_input(struct ifnet *, struct mbuf *); static void lagg_port_state(struct ifnet *, int); static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t); static int lagg_port_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); static int lagg_port_checkstacking(struct lagg_softc *); static void lagg_port2req(struct lagg_port *, struct lagg_reqport *); static void lagg_init(void *); static void lagg_stop(struct lagg_softc *); static int lagg_ioctl(struct ifnet *, u_long, caddr_t); static int lagg_ether_setmulti(struct lagg_softc *); static int lagg_ether_cmdmulti(struct lagg_port *, int); static void lagg_ether_purgemulti(struct lagg_softc *); static int lagg_setflag(struct lagg_port *, int, int, int (*func)(struct ifnet *, int)); static int lagg_setflags(struct lagg_port *, int status); static void lagg_start(struct ifnet *); static int lagg_media_change(struct ifnet *); static void lagg_media_status(struct ifnet *, struct ifmediareq *); static struct lagg_port *lagg_link_active(struct lagg_softc *, struct lagg_port *); static const void *lagg_gethdr(struct mbuf *, u_int, u_int, void *); IFC_SIMPLE_DECLARE(lagg, 0); /* Simple round robin */ static int lagg_rr_attach(struct lagg_softc *); static int lagg_rr_detach(struct lagg_softc *); static void lagg_rr_port_destroy(struct lagg_port *); static int lagg_rr_start(struct lagg_softc *, struct mbuf *); static struct mbuf *lagg_rr_input(struct lagg_softc *, struct lagg_port *, struct mbuf *); /* Active failover */ static int lagg_fail_attach(struct lagg_softc *); static int lagg_fail_detach(struct lagg_softc *); static int lagg_fail_start(struct lagg_softc *, struct mbuf *); static struct mbuf *lagg_fail_input(struct lagg_softc *, struct lagg_port *, struct mbuf *); /* Loadbalancing */ static int lagg_lb_attach(struct lagg_softc *); static int lagg_lb_detach(struct lagg_softc *); static int lagg_lb_port_create(struct lagg_port *); static void lagg_lb_port_destroy(struct lagg_port *); static int lagg_lb_start(struct lagg_softc *, struct mbuf *); static struct mbuf *lagg_lb_input(struct lagg_softc *, struct lagg_port *, struct mbuf *); static int lagg_lb_porttable(struct lagg_softc *, struct lagg_port *); /* 802.3ad LACP */ static int lagg_lacp_attach(struct lagg_softc *); static int lagg_lacp_detach(struct lagg_softc *); static int lagg_lacp_start(struct lagg_softc *, struct mbuf *); static struct mbuf *lagg_lacp_input(struct lagg_softc *, struct lagg_port *, struct mbuf *); static void lagg_lacp_lladdr(struct lagg_softc *); /* lagg protocol table */ static const struct { int ti_proto; int (*ti_attach)(struct lagg_softc *); } lagg_protos[] = { { LAGG_PROTO_ROUNDROBIN, lagg_rr_attach }, { LAGG_PROTO_FAILOVER, lagg_fail_attach }, { LAGG_PROTO_LOADBALANCE, lagg_lb_attach }, { LAGG_PROTO_ETHERCHANNEL, lagg_lb_attach }, { LAGG_PROTO_LACP, lagg_lacp_attach }, { LAGG_PROTO_NONE, NULL } }; static int lagg_modevent(module_t mod, int type, void *data) { switch (type) { case MOD_LOAD: mtx_init(&lagg_list_mtx, "if_lagg list", NULL, MTX_DEF); SLIST_INIT(&lagg_list); if_clone_attach(&lagg_cloner); lagg_input_p = lagg_input; lagg_linkstate_p = lagg_port_state; lagg_detach_cookie = EVENTHANDLER_REGISTER( ifnet_departure_event, lagg_port_ifdetach, NULL, EVENTHANDLER_PRI_ANY); break; case MOD_UNLOAD: EVENTHANDLER_DEREGISTER(ifnet_departure_event, lagg_detach_cookie); if_clone_detach(&lagg_cloner); lagg_input_p = NULL; lagg_linkstate_p = NULL; mtx_destroy(&lagg_list_mtx); break; default: return (EOPNOTSUPP); } return (0); } static moduledata_t lagg_mod = { "if_lagg", lagg_modevent, 0 }; DECLARE_MODULE(if_lagg, lagg_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); static int lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params) { struct lagg_softc *sc; struct ifnet *ifp; int i, error = 0; static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); ifp = sc->sc_ifp = if_alloc(IFT_ETHER); if (ifp == NULL) { free(sc, M_DEVBUF); return (ENOSPC); } sc->sc_proto = LAGG_PROTO_NONE; for (i = 0; lagg_protos[i].ti_proto != LAGG_PROTO_NONE; i++) { if (lagg_protos[i].ti_proto == LAGG_PROTO_DEFAULT) { sc->sc_proto = lagg_protos[i].ti_proto; if ((error = lagg_protos[i].ti_attach(sc)) != 0) { if_free_type(ifp, IFT_ETHER); free(sc, M_DEVBUF); return (error); } break; } } LAGG_LOCK_INIT(sc); SLIST_INIT(&sc->sc_ports); /* Initialise pseudo media types */ ifmedia_init(&sc->sc_media, 0, lagg_media_change, lagg_media_status); ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); if_initname(ifp, ifc->ifc_name, unit); ifp->if_type = IFT_ETHER; ifp->if_softc = sc; ifp->if_start = lagg_start; ifp->if_init = lagg_init; ifp->if_ioctl = lagg_ioctl; ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen); ifp->if_snd.ifq_drv_maxlen = ifqmaxlen; IFQ_SET_READY(&ifp->if_snd); /* * Attach as an ordinary ethernet device, childs will be attached * as special device IFT_IEEE8023ADLAG. */ ether_ifattach(ifp, eaddr); /* Insert into the global list of laggs */ mtx_lock(&lagg_list_mtx); SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); mtx_unlock(&lagg_list_mtx); return (0); } static void lagg_clone_destroy(struct ifnet *ifp) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; struct lagg_port *lp; LAGG_LOCK(sc); lagg_stop(sc); ifp->if_flags &= ~IFF_UP; /* Shutdown and remove lagg ports */ while ((lp = SLIST_FIRST(&sc->sc_ports)) != NULL) lagg_port_destroy(lp, 1); /* Unhook the aggregation protocol */ if (sc->sc_detach != NULL) (*sc->sc_detach)(sc); /* Remove any multicast groups that we may have joined. */ lagg_ether_purgemulti(sc); LAGG_UNLOCK(sc); ifmedia_removeall(&sc->sc_media); ether_ifdetach(ifp); if_free_type(ifp, IFT_ETHER); mtx_lock(&lagg_list_mtx); SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); mtx_unlock(&lagg_list_mtx); LAGG_LOCK_DESTROY(sc); free(sc, M_DEVBUF); } static void lagg_lladdr(struct lagg_softc *sc, uint8_t *lladdr) { struct ifnet *ifp = sc->sc_ifp; if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) return; bcopy(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN); /* Let the protocol know the MAC has changed */ if (sc->sc_lladdr != NULL) (*sc->sc_lladdr)(sc); } static int lagg_capabilities(struct lagg_softc *sc) { struct lagg_port *lp; int cap = ~0, priv; LAGG_LOCK_ASSERT(sc); /* Preserve private capabilities */ priv = sc->sc_capabilities & IFCAP_LAGG_MASK; /* Get capabilities from the lagg ports */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) cap &= lp->lp_capabilities; if (sc->sc_ifflags & IFF_DEBUG) { printf("%s: capabilities 0x%08x\n", sc->sc_ifname, cap == ~0 ? priv : (cap | priv)); } return (cap == ~0 ? priv : (cap | priv)); } static void lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) { struct ifnet *ifp = lp->lp_ifp; int error; if (memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) return; /* Set the link layer address */ error = if_setlladdr(ifp, lladdr, ETHER_ADDR_LEN); if (error) printf("%s: setlladdr failed on %s\n", __func__, lp->lp_ifname); } static int lagg_port_create(struct lagg_softc *sc, struct ifnet *ifp) { struct lagg_softc *sc_ptr; struct lagg_port *lp; int error = 0; LAGG_LOCK_ASSERT(sc); /* Limit the maximal number of lagg ports */ if (sc->sc_count >= LAGG_MAX_PORTS) return (ENOSPC); /* New lagg port has to be in an idle state */ if (ifp->if_drv_flags & IFF_DRV_OACTIVE) return (EBUSY); /* Check if port has already been associated to a lagg */ if (ifp->if_lagg != NULL) return (EBUSY); /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ if (ifp->if_type != IFT_ETHER) return (EPROTONOSUPPORT); if ((lp = malloc(sizeof(struct lagg_port), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) return (ENOMEM); /* Check if port is a stacked lagg */ mtx_lock(&lagg_list_mtx); SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { if (ifp == sc_ptr->sc_ifp) { mtx_unlock(&lagg_list_mtx); free(lp, M_DEVBUF); return (EINVAL); /* XXX disable stacking for the moment, its untested lp->lp_flags |= LAGG_PORT_STACK; if (lagg_port_checkstacking(sc_ptr) >= LAGG_MAX_STACKING) { mtx_unlock(&lagg_list_mtx); free(lp, M_DEVBUF); return (E2BIG); } */ } } mtx_unlock(&lagg_list_mtx); /* Change the interface type */ lp->lp_iftype = ifp->if_type; ifp->if_type = IFT_IEEE8023ADLAG; ifp->if_lagg = lp; lp->lp_ioctl = ifp->if_ioctl; ifp->if_ioctl = lagg_port_ioctl; lp->lp_output = ifp->if_output; ifp->if_output = lagg_port_output; lp->lp_ifp = ifp; lp->lp_lagg = sc; /* Save port link layer address */ bcopy(IF_LLADDR(ifp), lp->lp_lladdr, ETHER_ADDR_LEN); if (SLIST_EMPTY(&sc->sc_ports)) { sc->sc_primary = lp; lagg_lladdr(sc, IF_LLADDR(ifp)); } else { /* Update link layer address for this port */ lagg_port_lladdr(lp, IF_LLADDR(sc->sc_ifp)); } /* Insert into the list of ports */ SLIST_INSERT_HEAD(&sc->sc_ports, lp, lp_entries); sc->sc_count++; /* Update lagg capabilities */ sc->sc_capabilities = lagg_capabilities(sc); /* Add multicast addresses and interface flags to this port */ lagg_ether_cmdmulti(lp, 1); lagg_setflags(lp, 1); if (sc->sc_port_create != NULL) error = (*sc->sc_port_create)(lp); if (error) { /* remove the port again, without calling sc_port_destroy */ lagg_port_destroy(lp, 0); return (error); } return (error); } static int lagg_port_checkstacking(struct lagg_softc *sc) { struct lagg_softc *sc_ptr; struct lagg_port *lp; int m = 0; LAGG_LOCK_ASSERT(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { if (lp->lp_flags & LAGG_PORT_STACK) { sc_ptr = (struct lagg_softc *)lp->lp_ifp->if_softc; m = MAX(m, lagg_port_checkstacking(sc_ptr)); } } return (m + 1); } static int lagg_port_destroy(struct lagg_port *lp, int runpd) { struct lagg_softc *sc = lp->lp_lagg; struct lagg_port *lp_ptr; struct ifnet *ifp = lp->lp_ifp; LAGG_LOCK_ASSERT(sc); if (runpd && sc->sc_port_destroy != NULL) (*sc->sc_port_destroy)(lp); /* Remove multicast addresses and interface flags from this port */ lagg_ether_cmdmulti(lp, 0); lagg_setflags(lp, 0); /* Restore interface */ ifp->if_type = lp->lp_iftype; ifp->if_ioctl = lp->lp_ioctl; ifp->if_output = lp->lp_output; ifp->if_lagg = NULL; /* Finally, remove the port from the lagg */ SLIST_REMOVE(&sc->sc_ports, lp, lagg_port, lp_entries); sc->sc_count--; /* Update the primary interface */ if (lp == sc->sc_primary) { uint8_t lladdr[ETHER_ADDR_LEN]; if ((lp_ptr = SLIST_FIRST(&sc->sc_ports)) == NULL) { bzero(&lladdr, ETHER_ADDR_LEN); } else { bcopy(lp_ptr->lp_lladdr, lladdr, ETHER_ADDR_LEN); } lagg_lladdr(sc, lladdr); sc->sc_primary = lp_ptr; /* Update link layer address for each port */ SLIST_FOREACH(lp_ptr, &sc->sc_ports, lp_entries) lagg_port_lladdr(lp_ptr, lladdr); } /* Reset the port lladdr */ lagg_port_lladdr(lp, lp->lp_lladdr); if (lp->lp_ifflags) if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); free(lp, M_DEVBUF); /* Update lagg capabilities */ sc->sc_capabilities = lagg_capabilities(sc); return (0); } static int lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct lagg_reqport *rp = (struct lagg_reqport *)data; struct lagg_softc *sc; struct lagg_port *lp = NULL; int error = 0; /* Should be checked by the caller */ if (ifp->if_type != IFT_IEEE8023ADLAG || (lp = ifp->if_lagg) == NULL || (sc = lp->lp_lagg) == NULL) goto fallback; switch (cmd) { case SIOCGLAGGPORT: LAGG_LOCK(sc); if (rp->rp_portname[0] == '\0' || ifunit(rp->rp_portname) != ifp) { error = EINVAL; break; } if (lp->lp_lagg != sc) { error = ENOENT; break; } lagg_port2req(lp, rp); LAGG_UNLOCK(sc); break; default: goto fallback; } return (error); fallback: if (lp != NULL) return ((*lp->lp_ioctl)(ifp, cmd, data)); return (EINVAL); } static int lagg_port_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt0) { struct lagg_port *lp = ifp->if_lagg; struct ether_header *eh; short type = 0; switch (dst->sa_family) { case pseudo_AF_HDRCMPLT: case AF_UNSPEC: eh = (struct ether_header *)dst->sa_data; type = eh->ether_type; break; } /* * Only allow ethernet types required to initiate or maintain the link, * aggregated frames take a different path. */ switch (ntohs(type)) { case ETHERTYPE_PAE: /* EAPOL PAE/802.1x */ return ((*lp->lp_output)(ifp, m, dst, rt0)); } /* drop any other frames */ m_freem(m); return (EBUSY); } static void lagg_port_ifdetach(void *arg __unused, struct ifnet *ifp) { struct lagg_port *lp; struct lagg_softc *sc; if ((lp = ifp->if_lagg) == NULL) return; sc = lp->lp_lagg; LAGG_LOCK(sc); lagg_port_destroy(lp, 1); LAGG_UNLOCK(sc); } static void lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) { struct lagg_softc *sc = lp->lp_lagg; strlcpy(rp->rp_ifname, sc->sc_ifname, sizeof(rp->rp_ifname)); strlcpy(rp->rp_portname, lp->lp_ifp->if_xname, sizeof(rp->rp_portname)); rp->rp_prio = lp->lp_prio; rp->rp_flags = lp->lp_flags; /* Add protocol specific flags */ switch (sc->sc_proto) { case LAGG_PROTO_FAILOVER: if (lp == sc->sc_primary) rp->rp_flags |= LAGG_PORT_MASTER; /* FALLTHROUGH */ case LAGG_PROTO_ROUNDROBIN: case LAGG_PROTO_LOADBALANCE: case LAGG_PROTO_ETHERCHANNEL: if (LAGG_PORTACTIVE(lp)) rp->rp_flags |= LAGG_PORT_ACTIVE; break; case LAGG_PROTO_LACP: /* LACP has a different definition of active */ if (lacp_port_isactive(lp)) rp->rp_flags |= LAGG_PORT_ACTIVE; break; } } static void lagg_init(void *xsc) { struct lagg_softc *sc = (struct lagg_softc *)xsc; struct lagg_port *lp; struct ifnet *ifp = sc->sc_ifp; if (ifp->if_drv_flags & IFF_DRV_RUNNING) return; LAGG_LOCK(sc); ifp->if_drv_flags |= IFF_DRV_RUNNING; /* Update the port lladdrs */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lagg_port_lladdr(lp, IF_LLADDR(ifp)); if (sc->sc_init != NULL) (*sc->sc_init)(sc); LAGG_UNLOCK(sc); } static void lagg_stop(struct lagg_softc *sc) { struct ifnet *ifp = sc->sc_ifp; LAGG_LOCK_ASSERT(sc); if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) return; ifp->if_drv_flags &= ~IFF_DRV_RUNNING; if (sc->sc_stop != NULL) (*sc->sc_stop)(sc); } static int lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; struct lagg_reqall *ra = (struct lagg_reqall *)data; struct lagg_reqport *rp = (struct lagg_reqport *)data, rpbuf; struct ifreq *ifr = (struct ifreq *)data; struct lagg_port *lp; struct ifnet *tpif; struct thread *td = curthread; int i, error = 0, unlock = 1; LAGG_LOCK(sc); bzero(&rpbuf, sizeof(rpbuf)); switch (cmd) { case SIOCGLAGG: ra->ra_proto = sc->sc_proto; ra->ra_ports = i = 0; lp = SLIST_FIRST(&sc->sc_ports); while (lp && ra->ra_size >= i + sizeof(struct lagg_reqport)) { lagg_port2req(lp, &rpbuf); error = copyout(&rpbuf, (caddr_t)ra->ra_port + i, sizeof(struct lagg_reqport)); if (error) break; i += sizeof(struct lagg_reqport); ra->ra_ports++; lp = SLIST_NEXT(lp, lp_entries); } break; case SIOCSLAGG: error = priv_check(td, PRIV_NET_LAGG); if (error) break; if (ra->ra_proto >= LAGG_PROTO_MAX) { error = EPROTONOSUPPORT; break; } if (sc->sc_proto != LAGG_PROTO_NONE) { error = sc->sc_detach(sc); /* Reset protocol and pointers */ sc->sc_proto = LAGG_PROTO_NONE; sc->sc_detach = NULL; sc->sc_start = NULL; sc->sc_input = NULL; sc->sc_port_create = NULL; sc->sc_port_destroy = NULL; sc->sc_linkstate = NULL; sc->sc_init = NULL; sc->sc_stop = NULL; sc->sc_lladdr = NULL; } if (error != 0) break; for (i = 0; i < (sizeof(lagg_protos) / sizeof(lagg_protos[0])); i++) { if (lagg_protos[i].ti_proto == ra->ra_proto) { if (sc->sc_ifflags & IFF_DEBUG) printf("%s: using proto %u\n", sc->sc_ifname, lagg_protos[i].ti_proto); sc->sc_proto = lagg_protos[i].ti_proto; if (sc->sc_proto != LAGG_PROTO_NONE) error = lagg_protos[i].ti_attach(sc); goto out; } } error = EPROTONOSUPPORT; break; case SIOCGLAGGPORT: if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { error = EINVAL; break; } if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || lp->lp_lagg != sc) { error = ENOENT; break; } lagg_port2req(lp, rp); break; case SIOCSLAGGPORT: error = priv_check(td, PRIV_NET_LAGG); if (error) break; if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { error = EINVAL; break; } error = lagg_port_create(sc, tpif); break; case SIOCSLAGGDELPORT: error = priv_check(td, PRIV_NET_LAGG); if (error) break; if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { error = EINVAL; break; } if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || lp->lp_lagg != sc) { error = ENOENT; break; } error = lagg_port_destroy(lp, 1); break; case SIOCSIFFLAGS: /* Set flags on ports too */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { lagg_setflags(lp, 1); } if (!(ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING)) { /* * If interface is marked down and it is running, * then stop and disable it. */ lagg_stop(sc); } else if ((ifp->if_flags & IFF_UP) && !(ifp->if_drv_flags & IFF_DRV_RUNNING)) { /* * If interface is marked up and it is stopped, then * start it. */ LAGG_UNLOCK(sc); unlock = 0; (*ifp->if_init)(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: error = lagg_ether_setmulti(sc); break; case SIOCSIFMEDIA: case SIOCGIFMEDIA: LAGG_UNLOCK(sc); unlock = 0; error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); break; default: LAGG_UNLOCK(sc); unlock = 0; error = ether_ioctl(ifp, cmd, data); break; } out: if (unlock) LAGG_UNLOCK(sc); return (error); } static int lagg_ether_setmulti(struct lagg_softc *sc) { struct lagg_port *lp; LAGG_LOCK_ASSERT(sc); /* First, remove any existing filter entries. */ lagg_ether_purgemulti(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { lagg_ether_cmdmulti(lp, 1); } return (0); } static int lagg_ether_cmdmulti(struct lagg_port *lp, int set) { struct lagg_softc *sc = lp->lp_lagg; struct ifnet *ifp = lp->lp_ifp; struct ifnet *trifp = sc->sc_ifp; struct lagg_mc *mc; struct ifmultiaddr *ifma, *rifma = NULL; struct sockaddr_dl sdl; int error; LAGG_LOCK_ASSERT(sc); bzero((char *)&sdl, sizeof(sdl)); sdl.sdl_len = sizeof(sdl); sdl.sdl_family = AF_LINK; sdl.sdl_type = IFT_ETHER; sdl.sdl_alen = ETHER_ADDR_LEN; sdl.sdl_index = ifp->if_index; if (set) { TAILQ_FOREACH(ifma, &trifp->if_multiaddrs, ifma_link) { if (ifma->ifma_addr->sa_family != AF_LINK) continue; bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), LLADDR(&sdl), ETHER_ADDR_LEN); error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma); if (error) return (error); mc = malloc(sizeof(struct lagg_mc), M_DEVBUF, M_NOWAIT); if (mc == NULL) return (ENOMEM); mc->mc_ifma = rifma; SLIST_INSERT_HEAD(&lp->lp_mc_head, mc, mc_entries); } } else { while ((mc = SLIST_FIRST(&lp->lp_mc_head)) != NULL) { SLIST_REMOVE(&lp->lp_mc_head, mc, lagg_mc, mc_entries); if_delmulti_ifma(mc->mc_ifma); free(mc, M_DEVBUF); } } return (0); } static void lagg_ether_purgemulti(struct lagg_softc *sc) { struct lagg_port *lp; LAGG_LOCK_ASSERT(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lagg_ether_cmdmulti(lp, 0); } /* Handle a ref counted flag that should be set on the lagg port as well */ static int lagg_setflag(struct lagg_port *lp, int flag, int status, int (*func)(struct ifnet *, int)) { struct lagg_softc *sc = lp->lp_lagg; struct ifnet *trifp = sc->sc_ifp; struct ifnet *ifp = lp->lp_ifp; int error; LAGG_LOCK_ASSERT(sc); status = status ? (trifp->if_flags & flag) : 0; /* Now "status" contains the flag value or 0 */ /* * See if recorded ports status is different from what * we want it to be. If it is, flip it. We record ports * status in lp_ifflags so that we won't clear ports flag * we haven't set. In fact, we don't clear or set ports * flags directly, but get or release references to them. * That's why we can be sure that recorded flags still are * in accord with actual ports flags. */ if (status != (lp->lp_ifflags & flag)) { error = (*func)(ifp, status); if (error) return (error); lp->lp_ifflags &= ~flag; lp->lp_ifflags |= status; } return (0); } /* * Handle IFF_* flags that require certain changes on the lagg port * if "status" is true, update ports flags respective to the lagg * if "status" is false, forcedly clear the flags set on port. */ static int lagg_setflags(struct lagg_port *lp, int status) { int error, i; for (i = 0; lagg_pflags[i].flag; i++) { error = lagg_setflag(lp, lagg_pflags[i].flag, status, lagg_pflags[i].func); if (error) return (error); } return (0); } static void lagg_start(struct ifnet *ifp) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; struct mbuf *m; int error = 0; for (;; error = 0) { IFQ_DEQUEUE(&ifp->if_snd, m); if (m == NULL) break; BPF_MTAP(ifp, m); if (sc->sc_proto != LAGG_PROTO_NONE) { LAGG_LOCK(sc); error = (*sc->sc_start)(sc, m); LAGG_UNLOCK(sc); } else m_free(m); if (error == 0) ifp->if_opackets++; else ifp->if_oerrors++; } return; } static struct mbuf * lagg_input(struct ifnet *ifp, struct mbuf *m) { struct lagg_port *lp = ifp->if_lagg; struct lagg_softc *sc = lp->lp_lagg; struct ifnet *trifp = sc->sc_ifp; if ((trifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || (lp->lp_flags & LAGG_PORT_DISABLED) || sc->sc_proto == LAGG_PROTO_NONE) { m_freem(m); return (NULL); } LAGG_LOCK(sc); BPF_MTAP(trifp, m); m = (*sc->sc_input)(sc, lp, m); if (m != NULL) { ifp->if_ipackets++; ifp->if_ibytes += m->m_pkthdr.len; trifp->if_ipackets++; trifp->if_ibytes += m->m_pkthdr.len; } LAGG_UNLOCK(sc); return (m); } static int lagg_media_change(struct ifnet *ifp) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; if (sc->sc_ifflags & IFF_DEBUG) printf("%s\n", __func__); /* Ignore */ return (0); } static void lagg_media_status(struct ifnet *ifp, struct ifmediareq *imr) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; struct lagg_port *lp; imr->ifm_status = IFM_AVALID; imr->ifm_active = IFM_ETHER | IFM_AUTO; LAGG_LOCK(sc); lp = sc->sc_primary; if (lp != NULL && lp->lp_ifp->if_flags & IFF_UP) imr->ifm_status |= IFM_ACTIVE; LAGG_UNLOCK(sc); } static void lagg_port_state(struct ifnet *ifp, int state) { struct lagg_port *lp = (struct lagg_port *)ifp->if_lagg; struct lagg_softc *sc = NULL; if (lp != NULL) sc = lp->lp_lagg; if (sc == NULL) return; LAGG_LOCK(sc); if (sc->sc_linkstate != NULL) (*sc->sc_linkstate)(lp); LAGG_UNLOCK(sc); } struct lagg_port * lagg_link_active(struct lagg_softc *sc, struct lagg_port *lp) { struct lagg_port *lp_next, *rval = NULL; // int new_link = LINK_STATE_DOWN; LAGG_LOCK_ASSERT(sc); /* * Search a port which reports an active link state. */ if (lp == NULL) goto search; if (LAGG_PORTACTIVE(lp)) { rval = lp; goto found; } if ((lp_next = SLIST_NEXT(lp, lp_entries)) != NULL && LAGG_PORTACTIVE(lp_next)) { rval = lp_next; goto found; } search: SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { if (LAGG_PORTACTIVE(lp_next)) { rval = lp_next; goto found; } } found: if (rval != NULL) { /* * The IEEE 802.1D standard assumes that a lagg with * multiple ports is always full duplex. This is valid * for load sharing laggs and if at least two links * are active. Unfortunately, checking the latter would * be too expensive at this point. XXX if ((sc->sc_capabilities & IFCAP_LAGG_FULLDUPLEX) && (sc->sc_count > 1)) new_link = LINK_STATE_FULL_DUPLEX; else new_link = rval->lp_link_state; */ } return (rval); } static const void * lagg_gethdr(struct mbuf *m, u_int off, u_int len, void *buf) { if (m->m_pkthdr.len < (off + len)) { return (NULL); } else if (m->m_len < (off + len)) { m_copydata(m, off, len, buf); return (buf); } return (mtod(m, char *) + off); } uint32_t lagg_hashmbuf(struct mbuf *m, uint32_t key) { uint16_t etype; uint32_t p = 0; int off; struct ether_header *eh; struct ether_vlan_header vlanbuf; const struct ether_vlan_header *vlan; #ifdef INET const struct ip *ip; struct ip ipbuf; #endif #ifdef INET6 const struct ip6_hdr *ip6; struct ip6_hdr ip6buf; #endif off = sizeof(*eh); if (m->m_len < off) goto out; eh = mtod(m, struct ether_header *); etype = ntohs(eh->ether_type); p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, key); p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); /* Special handling for encapsulating VLAN frames */ if (m->m_flags & M_VLANTAG) { p = hash32_buf(&m->m_pkthdr.ether_vtag, sizeof(m->m_pkthdr.ether_vtag), p); } else if (etype == ETHERTYPE_VLAN) { vlan = lagg_gethdr(m, off, sizeof(*vlan), &vlanbuf); if (vlan == NULL) goto out; p = hash32_buf(&vlan->evl_tag, sizeof(vlan->evl_tag), p); etype = ntohs(vlan->evl_proto); off += sizeof(*vlan) - sizeof(*eh); } switch (etype) { #ifdef INET case ETHERTYPE_IP: ip = lagg_gethdr(m, off, sizeof(*ip), &ipbuf); if (ip == NULL) goto out; p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); break; #endif #ifdef INET6 case ETHERTYPE_IPV6: ip6 = lagg_gethdr(m, off, sizeof(*ip6), &ip6buf); if (ip6 == NULL) goto out; p = hash32_buf(&ip6->ip6_src, sizeof(struct in6_addr), p); p = hash32_buf(&ip6->ip6_dst, sizeof(struct in6_addr), p); break; #endif } out: return (p); } int lagg_enqueue(struct ifnet *ifp, struct mbuf *m) { int error = 0; /* Send mbuf */ IFQ_ENQUEUE(&ifp->if_snd, m, error); if (error) return (error); if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0) (*ifp->if_start)(ifp); ifp->if_obytes += m->m_pkthdr.len; if (m->m_flags & M_MCAST) ifp->if_omcasts++; return (error); } /* * Simple round robin aggregation */ static int lagg_rr_attach(struct lagg_softc *sc) { struct lagg_port *lp; sc->sc_detach = lagg_rr_detach; sc->sc_start = lagg_rr_start; sc->sc_input = lagg_rr_input; sc->sc_port_create = NULL; sc->sc_port_destroy = lagg_rr_port_destroy; sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; lp = SLIST_FIRST(&sc->sc_ports); sc->sc_psc = (caddr_t)lp; return (0); } static int lagg_rr_detach(struct lagg_softc *sc) { sc->sc_psc = NULL; return (0); } static void lagg_rr_port_destroy(struct lagg_port *lp) { struct lagg_softc *sc = lp->lp_lagg; if (lp == (struct lagg_port *)sc->sc_psc) sc->sc_psc = NULL; } static int lagg_rr_start(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp = (struct lagg_port *)sc->sc_psc, *lp_next; int error = 0; if (lp == NULL && (lp = lagg_link_active(sc, NULL)) == NULL) return (ENOENT); /* Send mbuf */ error = lagg_enqueue(lp->lp_ifp, m); /* Get next active port */ lp_next = lagg_link_active(sc, SLIST_NEXT(lp, lp_entries)); sc->sc_psc = (caddr_t)lp_next; return (error); } static struct mbuf * lagg_rr_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) { struct ifnet *ifp = sc->sc_ifp; /* Just pass in the packet to our lagg device */ m->m_pkthdr.rcvif = ifp; return (m); } /* * Active failover */ static int lagg_fail_attach(struct lagg_softc *sc) { sc->sc_detach = lagg_fail_detach; sc->sc_start = lagg_fail_start; sc->sc_input = lagg_fail_input; sc->sc_port_create = NULL; sc->sc_port_destroy = NULL; return (0); } static int lagg_fail_detach(struct lagg_softc *sc) { return (0); } static int lagg_fail_start(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp; /* Use the master port if active or the next available port */ if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) return (ENOENT); /* Send mbuf */ return (lagg_enqueue(lp->lp_ifp, m)); } static struct mbuf * lagg_fail_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) { struct ifnet *ifp = sc->sc_ifp; struct lagg_port *tmp_tp; if (lp == sc->sc_primary) { m->m_pkthdr.rcvif = ifp; return (m); } if (sc->sc_primary->lp_link_state == LINK_STATE_DOWN) { tmp_tp = lagg_link_active(sc, NULL); /* * If tmp_tp is null, we've recieved a packet when all * our links are down. Weird, but process it anyways. */ if ((tmp_tp == NULL || tmp_tp == lp)) { m->m_pkthdr.rcvif = ifp; return (m); } } m_freem(m); return (NULL); } /* * Loadbalancing */ static int lagg_lb_attach(struct lagg_softc *sc) { struct lagg_port *lp; struct lagg_lb *lb; if ((lb = (struct lagg_lb *)malloc(sizeof(struct lagg_lb), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) return (ENOMEM); sc->sc_detach = lagg_lb_detach; sc->sc_start = lagg_lb_start; sc->sc_input = lagg_lb_input; sc->sc_port_create = lagg_lb_port_create; sc->sc_port_destroy = lagg_lb_port_destroy; sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; lb->lb_key = arc4random(); sc->sc_psc = (caddr_t)lb; SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lagg_lb_port_create(lp); return (0); } static int lagg_lb_detach(struct lagg_softc *sc) { struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; if (lb != NULL) free(lb, M_DEVBUF); return (0); } static int lagg_lb_porttable(struct lagg_softc *sc, struct lagg_port *lp) { struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; struct lagg_port *lp_next; int i = 0; bzero(&lb->lb_ports, sizeof(lb->lb_ports)); SLIST_FOREACH(lp_next, &sc->sc_ports, lp_entries) { if (lp_next == lp) continue; if (i >= LAGG_MAX_PORTS) return (EINVAL); if (sc->sc_ifflags & IFF_DEBUG) printf("%s: port %s at index %d\n", sc->sc_ifname, lp_next->lp_ifname, i); lb->lb_ports[i++] = lp_next; } return (0); } static int lagg_lb_port_create(struct lagg_port *lp) { struct lagg_softc *sc = lp->lp_lagg; return (lagg_lb_porttable(sc, NULL)); } static void lagg_lb_port_destroy(struct lagg_port *lp) { struct lagg_softc *sc = lp->lp_lagg; lagg_lb_porttable(sc, lp); } static int lagg_lb_start(struct lagg_softc *sc, struct mbuf *m) { struct lagg_lb *lb = (struct lagg_lb *)sc->sc_psc; struct lagg_port *lp = NULL; uint32_t p = 0; int idx; p = lagg_hashmbuf(m, lb->lb_key); if ((idx = p % sc->sc_count) >= LAGG_MAX_PORTS) return (EINVAL); lp = lb->lb_ports[idx]; /* * Check the port's link state. This will return the next active * port if the link is down or the port is NULL. */ if ((lp = lagg_link_active(sc, lp)) == NULL) return (ENOENT); /* Send mbuf */ return (lagg_enqueue(lp->lp_ifp, m)); } static struct mbuf * lagg_lb_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) { struct ifnet *ifp = sc->sc_ifp; /* Just pass in the packet to our lagg device */ m->m_pkthdr.rcvif = ifp; return (m); } /* * 802.3ad LACP */ static int lagg_lacp_attach(struct lagg_softc *sc) { struct lagg_port *lp; int error; sc->sc_detach = lagg_lacp_detach; sc->sc_port_create = lacp_port_create; sc->sc_port_destroy = lacp_port_destroy; sc->sc_linkstate = lacp_linkstate; sc->sc_start = lagg_lacp_start; sc->sc_input = lagg_lacp_input; sc->sc_init = lacp_init; sc->sc_stop = lacp_stop; sc->sc_lladdr = lagg_lacp_lladdr; error = lacp_attach(sc); if (error) return (error); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lacp_port_create(lp); return (error); } static int lagg_lacp_detach(struct lagg_softc *sc) { struct lagg_port *lp; int error; SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lacp_port_destroy(lp); /* unlocking is safe here */ LAGG_UNLOCK(sc); error = lacp_detach(sc); LAGG_LOCK(sc); return (error); } static void lagg_lacp_lladdr(struct lagg_softc *sc) { struct lagg_port *lp; /* purge all the lacp ports */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lacp_port_destroy(lp); /* add them back in */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) lacp_port_create(lp); } static int lagg_lacp_start(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp; lp = lacp_select_tx_port(sc, m); if (lp == NULL) return (EBUSY); /* Send mbuf */ return (lagg_enqueue(lp->lp_ifp, m)); } static struct mbuf * lagg_lacp_input(struct lagg_softc *sc, struct lagg_port *lp, struct mbuf *m) { struct ifnet *ifp = sc->sc_ifp; struct ether_header *eh; u_short etype; uint8_t subtype; eh = mtod(m, struct ether_header *); etype = ntohs(eh->ether_type); /* Tap off LACP control messages */ if (etype == ETHERTYPE_SLOW) { if (m->m_pkthdr.len < sizeof(*eh) + sizeof(subtype)) { m_freem(m); return (NULL); } m_copydata(m, sizeof(*eh), sizeof(subtype), &subtype); switch (subtype) { case SLOWPROTOCOLS_SUBTYPE_LACP: lacp_input(lp, m); break; case SLOWPROTOCOLS_SUBTYPE_MARKER: lacp_marker_input(lp, m); break; default: /* Unknown LACP packet type */ m_freem(m); break; } return (NULL); } /* * If the port is not collecting or not in the active aggregator then * free and return. */ if ((lp->lp_flags & LAGG_PORT_COLLECTING) == 0 || lacp_port_isactive(lp) == 0) { m_freem(m); return (NULL); } m->m_pkthdr.rcvif = ifp; return (m); }