/* $OpenBSD: if_trunk.c,v 1.30 2007/01/31 06:20:19 reyk Exp $ * $FreeBSD: head/sys/net/if_lagg.c 256218 2013-10-09 19:04:40Z glebius $ */ /* * Copyright (c) 2005, 2006 Reyk Floeter * Copyright (c) 2007 Andrew Thompson * Copyright (c) 2014 Marcelo Araujo * * 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 #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 #include #include #include #include #include #include #if defined(INET) || defined(INET6) #include #endif #ifdef INET #include #include #include #endif #ifdef INET6 #include #include #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(, lagg_softc) lagg_list; /* list of laggs */ static struct lock lagg_list_lock; eventhandler_tag lagg_detach_cookie = NULL; static int lagg_clone_create(struct if_clone *, int, caddr_t, caddr_t); static int lagg_clone_destroy(struct ifnet *); static const char * laggname = "lagg"; struct if_clone lagg_cloner = IF_CLONE_INITIALIZER("lagg", lagg_clone_create, lagg_clone_destroy, 0, IF_MAXUNIT); static void lagg_lladdr(struct lagg_softc *, uint8_t *); static void lagg_capabilities(struct lagg_softc *); static void lagg_port_lladdr(struct lagg_port *, uint8_t *); static void lagg_port_setlladdr(void *, int); static int lagg_port_create(struct lagg_softc *, struct ifnet *); static int lagg_port_destroy(struct lagg_port *, int); static void lagg_input(struct ifnet *, struct mbuf *); static void lagg_linkstate(struct lagg_softc *); #if 0 /* XXX */ static void lagg_port_state(struct ifnet *, int); #endif static int lagg_port_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *cr); static int lagg_port_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static void lagg_port_ifdetach(void *arg __unused, struct ifnet *); #ifdef LAGG_PORT_STACKING static int lagg_port_checkstacking(struct lagg_softc *); #endif 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, struct ucred *cr); static int lagg_ether_setmulti(struct lagg_softc *); static int lagg_ether_cmdmulti(struct lagg_port *, int); 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 *, struct ifaltq_subque *ifsq); static void lagg_start_dispatch(netmsg_t msg); /* Not needed? static int lagg_output(struct ifnet *ifp, struct mbuf *m); */ #if 0 /* XXX */ static int lagg_transmit(struct ifnet *, struct mbuf *); static void lagg_qflush(struct ifnet *); #endif 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 *); static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS); /* Simple round robin */ static int lagg_rr_attach(struct lagg_softc *); static int lagg_rr_detach(struct lagg_softc *); static struct ifnet *lagg_rr_select_tx_port(struct lagg_softc *sc, struct mbuf *m); 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 struct ifnet *lagg_fail_select_tx_port(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 struct ifnet *lagg_lb_select_tx_port(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 struct ifnet *lagg_lacp_select_tx_port(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 *); static void lagg_callout(void *); /* 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 } }; SYSCTL_DECL(_net_link); SYSCTL_NODE(_net_link, OID_AUTO, lagg, CTLFLAG_RW, 0, "Link Aggregation"); static int lagg_failover_rx_all = 0; /* Allow input on any failover links */ SYSCTL_INT(_net_link_lagg, OID_AUTO, failover_rx_all, CTLFLAG_RW, &lagg_failover_rx_all, 0, "Accept input from any interface in a failover lagg"); static int def_use_flowid = 1; /* Default value for using M_FLOWID */ TUNABLE_INT("net.link.lagg.default_use_flowid", &def_use_flowid); SYSCTL_INT(_net_link_lagg, OID_AUTO, default_use_flowid, CTLFLAG_RW, &def_use_flowid, 0, "Default setting for using flow id for load sharing"); static int lagg_modevent(module_t mod, int type, void *data) { switch (type) { case MOD_LOAD: lockinit(&lagg_list_lock, "if_lagg list", 0, 0); SLIST_INIT(&lagg_list); if_clone_attach(&lagg_cloner); lagg_input_p = lagg_input; 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); lagg_input_p = NULL; if_clone_detach(&lagg_cloner); lockuninit(&lagg_list_lock); 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); MODULE_VERSION(if_lagg, 1); /* * This routine is run via an vlan * config EVENT */ static void lagg_register_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) { #if 0 /* XXX */ struct lagg_softc *sc = ifp->if_softc; struct lagg_port *lp; if (ifp->if_softc != arg) /* Not our event */ return; LAGG_RLOCK(sc); if (!SLIST_EMPTY(&sc->sc_ports)) { SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) EVENTHANDLER_INVOKE(vlan_config, lp->lp_ifp); } LAGG_RUNLOCK(sc); #endif } /* * This routine is run via an vlan * unconfig EVENT */ static void lagg_unregister_vlan(void *arg, struct ifnet *ifp, u_int16_t vtag) { struct lagg_softc *sc = ifp->if_softc; /* struct lagg_port *lp; */ if (ifp->if_softc != arg) /* Not our event */ return; LAGG_RLOCK(sc); if (!SLIST_EMPTY(&sc->sc_ports)) { #if 0 /* XXX */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) EVENTHANDLER_INVOKE(vlan_unconfig, lp->lp_ifp); #endif } LAGG_RUNLOCK(sc); } static int lagg_clone_create(struct if_clone *ifc, int unit, caddr_t params __unused, caddr_t data __unused) { struct lagg_softc *sc; struct ifnet *ifp; int i, error = 0; static const u_char eaddr[6]; /* 00:00:00:00:00:00 */ struct sysctl_oid *oid; char num[14]; /* sufficient for 32 bits */ sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO); ifp = sc->sc_ifp = &sc->sc_if; // XXX if_alloc(IFT_ETHER); /* if (ifp == NULL) { kfree(sc, M_DEVBUF); return (ENOSPC); } */ /* sc->sc_ipackets = counter_u64_alloc(M_WAITOK); sc->sc_opackets = counter_u64_alloc(M_WAITOK); sc->sc_ibytes = counter_u64_alloc(M_WAITOK); sc->sc_obytes = counter_u64_alloc(M_WAITOK); */ sysctl_ctx_init(&sc->ctx); ksnprintf(num, sizeof(num), "%u", unit); sc->use_flowid = def_use_flowid; sc->sc_oid = oid = SYSCTL_ADD_NODE(&sc->ctx, &SYSCTL_NODE_CHILDREN(_net_link, lagg), OID_AUTO, num, CTLFLAG_RD, NULL, ""); SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "use_flowid", CTLTYPE_INT|CTLFLAG_RW, &sc->use_flowid, sc->use_flowid, "Use flow id for load sharing"); SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "count", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_count, sc->sc_count, "Total number of ports"); SYSCTL_ADD_PROC(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "active", CTLTYPE_INT|CTLFLAG_RD, sc, 0, lagg_sysctl_active, "I", "Total number of active ports"); SYSCTL_ADD_INT(&sc->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, "flapping", CTLTYPE_INT|CTLFLAG_RD, &sc->sc_flapping, sc->sc_flapping, "Total number of port change events"); /* Hash all layers by default */ sc->sc_flags = LAGG_F_HASHL2|LAGG_F_HASHL3|LAGG_F_HASHL4; 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(ifp); kfree(sc, M_DEVBUF); return (error); } break; } } LAGG_LOCK_INIT(sc); LAGG_CALLOUT_LOCK_INIT(sc); SLIST_INIT(&sc->sc_ports); TASK_INIT(&sc->sc_lladdr_task, 0, lagg_port_setlladdr, sc); /* * This uses the callout lock rather than the rmlock; one can't * hold said rmlock during SWI. */ callout_init_lk(&sc->sc_callout, &sc->sc_call_lock); /* 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, laggname, unit); ifp->if_softc = sc; #if 0 /* XXX */ ifp->if_transmit = lagg_transmit; ifp->if_qflush = lagg_qflush; #endif ifp->if_mtu = ETHERMTU; ifp->if_init = lagg_init; ifp->if_ioctl = lagg_ioctl; ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST; ifp->if_start = lagg_start; ifp->if_type = IFT_ETHER; ifq_set_maxlen(&ifp->if_snd, ifqmaxlen); ifq_set_ready(&ifp->if_snd); ifp->if_hdrlen = ETHER_HDR_LEN; #if 0 /* XXX */ ifp->if_capenable = ifp->if_capabilities = IFCAP_HWSTATS; #endif /* * Attach as an ordinary ethernet device, children will be attached * as special device IFT_IEEE8023ADLAG. */ ether_ifattach(ifp, eaddr, NULL); sc->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, lagg_register_vlan, sc, EVENTHANDLER_PRI_FIRST); sc->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, lagg_unregister_vlan, sc, EVENTHANDLER_PRI_FIRST); /* Insert into the global list of laggs */ lockmgr(&lagg_list_lock, LK_EXCLUSIVE); SLIST_INSERT_HEAD(&lagg_list, sc, sc_entries); lockmgr(&lagg_list_lock, LK_RELEASE); callout_reset(&sc->sc_callout, hz, lagg_callout, sc); return (0); } static int lagg_clone_destroy(struct ifnet *ifp) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; struct lagg_port *lp; LAGG_WLOCK(sc); lagg_stop(sc); ifp->if_flags &= ~IFF_UP; EVENTHANDLER_DEREGISTER(vlan_config, sc->vlan_attach); EVENTHANDLER_DEREGISTER(vlan_unconfig, sc->vlan_detach); /* 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); LAGG_WUNLOCK(sc); sysctl_ctx_free(&sc->ctx); ifmedia_removeall(&sc->sc_media); ether_ifdetach(ifp); /* This ifp is part of lagg_softc, don't free it! */ /* if_free(ifp); */ /* This grabs sc_callout_mtx, serialising it correctly */ callout_drain(&sc->sc_callout); #if 0 /* At this point it's drained; we can free this */ counter_u64_free(sc->sc_ipackets); counter_u64_free(sc->sc_opackets); counter_u64_free(sc->sc_ibytes); counter_u64_free(sc->sc_obytes); #endif lockmgr(&lagg_list_lock, LK_EXCLUSIVE); SLIST_REMOVE(&lagg_list, sc, lagg_softc, sc_entries); lockmgr(&lagg_list_lock, LK_RELEASE); taskqueue_drain(taskqueue_swi, &sc->sc_lladdr_task); LAGG_LOCK_DESTROY(sc); LAGG_CALLOUT_LOCK_DESTROY(sc); kfree(sc, M_DEVBUF); return 0; } 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); EVENTHANDLER_INVOKE(iflladdr_event, ifp); } static void lagg_capabilities(struct lagg_softc *sc) { struct lagg_port *lp; int cap = ~0, ena = ~0; u_long hwa = ~0UL; LAGG_WLOCK_ASSERT(sc); /* Get capabilities from the lagg ports */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { cap &= lp->lp_ifp->if_capabilities; ena &= lp->lp_ifp->if_capenable; hwa &= lp->lp_ifp->if_hwassist; } cap = (cap == ~0 ? 0 : cap); ena = (ena == ~0 ? 0 : ena); hwa = (hwa == ~0 ? 0 : hwa); if (sc->sc_ifp->if_capabilities != cap || sc->sc_ifp->if_capenable != ena || sc->sc_ifp->if_hwassist != hwa) { sc->sc_ifp->if_capabilities = cap; sc->sc_ifp->if_capenable = ena; sc->sc_ifp->if_hwassist = hwa; getmicrotime(&sc->sc_ifp->if_lastchange); if (sc->sc_ifflags & IFF_DEBUG) if_printf(sc->sc_ifp, "capabilities 0x%08x enabled 0x%08x\n", cap, ena); } } static void lagg_port_lladdr(struct lagg_port *lp, uint8_t *lladdr) { struct lagg_softc *sc = lp->lp_softc; struct ifnet *ifp = lp->lp_ifp; struct lagg_llq *llq; int pending = 0; LAGG_WLOCK_ASSERT(sc); if (lp->lp_detaching || memcmp(lladdr, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) return; /* Check to make sure its not already queued to be changed */ SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { if (llq->llq_ifp == ifp) { pending = 1; break; } } if (!pending) { llq = kmalloc(sizeof(struct lagg_llq), M_DEVBUF, M_NOWAIT); if (llq == NULL) /* XXX what to do */ return; } /* Update the lladdr even if pending, it may have changed */ llq->llq_ifp = ifp; bcopy(lladdr, llq->llq_lladdr, ETHER_ADDR_LEN); if (!pending) SLIST_INSERT_HEAD(&sc->sc_llq_head, llq, llq_entries); taskqueue_enqueue(taskqueue_swi, &sc->sc_lladdr_task); } /* * Set the interface MAC address from a taskqueue to avoid a LOR. */ static void lagg_port_setlladdr(void *arg, int pending) { struct lagg_softc *sc = (struct lagg_softc *)arg; struct lagg_llq *llq, *head; struct ifnet *ifp; int error; /* Grab a local reference of the queue and remove it from the softc */ LAGG_WLOCK(sc); head = SLIST_FIRST(&sc->sc_llq_head); SLIST_FIRST(&sc->sc_llq_head) = NULL; LAGG_WUNLOCK(sc); /* * Traverse the queue and set the lladdr on each ifp. It is safe to do * unlocked as we have the only reference to it. */ for (llq = head; llq != NULL; llq = head) { ifp = llq->llq_ifp; /* Set the link layer address */ /* CURVNET_SET(ifp->if_vnet); */ error = if_setlladdr(ifp, llq->llq_lladdr, ETHER_ADDR_LEN); /* CURVNET_RESTORE(); */ if (error) kprintf("%s: setlladdr failed on %s\n", __func__, ifp->if_xname); head = SLIST_NEXT(llq, llq_entries); kfree(llq, M_DEVBUF); } } 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_WLOCK_ASSERT(sc); /* Limit the maximal number of lagg ports */ if (sc->sc_count >= LAGG_MAX_PORTS) return (ENOSPC); /* Check if port has already been associated to a lagg */ if (ifp->if_lagg != NULL) { /* Port is already in the current lagg? */ lp = (struct lagg_port *)ifp->if_lagg; if (lp->lp_softc == sc) return (EEXIST); return (EBUSY); } /* XXX Disallow non-ethernet interfaces (this should be any of 802) */ if (ifp->if_type != IFT_ETHER) return (EPROTONOSUPPORT); #ifdef INET6 /* * The member interface should not have inet6 address because * two interfaces with a valid link-local scope zone must not be * merged in any form. This restriction is needed to * prevent violation of link-local scope zone. Attempts to * add a member interface which has inet6 addresses triggers * removal of all inet6 addresses on the member interface. */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { if (in6ifa_llaonifp(lp->lp_ifp)) { in6_ifdetach(lp->lp_ifp); if_printf(sc->sc_ifp, "IPv6 addresses on %s have been removed " "before adding it as a member to prevent " "IPv6 address scope violation.\n", lp->lp_ifp->if_xname); } } if (in6ifa_llaonifp(ifp)) { in6_ifdetach(ifp); if_printf(sc->sc_ifp, "IPv6 addresses on %s have been removed " "before adding it as a member to prevent " "IPv6 address scope violation.\n", ifp->if_xname); } #endif /* Allow the first Ethernet member to define the MTU */ if (SLIST_EMPTY(&sc->sc_ports)) sc->sc_ifp->if_mtu = ifp->if_mtu; else if (sc->sc_ifp->if_mtu != ifp->if_mtu) { if_printf(sc->sc_ifp, "invalid MTU for %s\n", ifp->if_xname); return (EINVAL); } if ((lp = kmalloc(sizeof(struct lagg_port), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) return (ENOMEM); /* Check if port is a stacked lagg */ lockmgr(&lagg_list_lock, LK_EXCLUSIVE); SLIST_FOREACH(sc_ptr, &lagg_list, sc_entries) { if (ifp == sc_ptr->sc_ifp) { lockmgr(&lagg_list_lock, LK_RELEASE); kfree(lp, M_DEVBUF); return (EINVAL); /* XXX disable stacking for the moment, its untested */ #ifdef LAGG_PORT_STACKING lp->lp_flags |= LAGG_PORT_STACK; if (lagg_port_checkstacking(sc_ptr) >= LAGG_MAX_STACKING) { lockmgr(&lagg_list_lock, LK_RELEASE); kfree(lp, M_DEVBUF); return (E2BIG); } #endif } } lockmgr(&lagg_list_lock, LK_RELEASE); /* 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_softc = 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 */ lagg_capabilities(sc); lagg_linkstate(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); } #ifdef LAGG_PORT_STACKING static int lagg_port_checkstacking(struct lagg_softc *sc) { struct lagg_softc *sc_ptr; struct lagg_port *lp; int m = 0; LAGG_WLOCK_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); } #endif static int lagg_port_destroy(struct lagg_port *lp, int runpd) { struct lagg_softc *sc = lp->lp_softc; struct lagg_port *lp_ptr; struct lagg_llq *llq; struct ifnet *ifp = lp->lp_ifp; LAGG_WLOCK_ASSERT(sc); if (runpd && sc->sc_port_destroy != NULL) (*sc->sc_port_destroy)(lp); /* * Remove multicast addresses and interface flags from this port and * reset the MAC address, skip if the interface is being detached. */ if (!lp->lp_detaching) { lagg_ether_cmdmulti(lp, 0); lagg_setflags(lp, 0); lagg_port_lladdr(lp, lp->lp_lladdr); } /* 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); } /* Remove any pending lladdr changes from the queue */ if (lp->lp_detaching) { SLIST_FOREACH(llq, &sc->sc_llq_head, llq_entries) { if (llq->llq_ifp == ifp) { SLIST_REMOVE(&sc->sc_llq_head, llq, lagg_llq, llq_entries); kfree(llq, M_DEVBUF); break; /* Only appears once */ } } } if (lp->lp_ifflags) if_printf(ifp, "%s: lp_ifflags unclean\n", __func__); kfree(lp, M_DEVBUF); /* Update lagg capabilities */ lagg_capabilities(sc); lagg_linkstate(sc); return (0); } static int lagg_port_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) { struct lagg_reqport *rp = (struct lagg_reqport *)data; struct lagg_softc *sc; struct lagg_port *lp = NULL; int error = 0; ASSERT_IFNET_SERIALIZED_ALL(ifp); /* Should be checked by the caller */ if (ifp->if_type != IFT_IEEE8023ADLAG || (lp = ifp->if_lagg) == NULL || (sc = lp->lp_softc) == NULL) goto fallback; switch (cmd) { case SIOCGLAGGPORT: if (rp->rp_portname[0] == '\0') { error = EINVAL; break; } /* * Release ifp serializers before ifnet_lock * to prevent lock order reversal. */ ifnet_deserialize_all(ifp); ifnet_lock(); if (ifunit(rp->rp_portname) != ifp) { ifnet_unlock(); ifnet_serialize_all(ifp); error = EINVAL; break; } ifnet_unlock(); ifnet_serialize_all(ifp); LAGG_RLOCK(sc); if ((lp = ifp->if_lagg) == NULL || lp->lp_softc != sc) { error = ENOENT; LAGG_RUNLOCK(sc); break; } lagg_port2req(lp, rp); LAGG_RUNLOCK(sc); break; case SIOCSIFCAP: if (lp->lp_ioctl == NULL) { error = EINVAL; break; } error = (*lp->lp_ioctl)(ifp, cmd, data, cr); if (error) break; /* Update lagg interface capabilities */ LAGG_WLOCK(sc); lagg_capabilities(sc); LAGG_WUNLOCK(sc); break; case SIOCGIFMEDIA: if (lp->lp_ioctl == NULL) { error = EINVAL; break; } error = (*lp->lp_ioctl)(ifp, cmd, data, cr); break; case SIOCSIFMTU: /* Do not allow the MTU to be changed once joined */ error = EINVAL; break; default: goto fallback; } return (error); fallback: if (lp->lp_ioctl != NULL) { int result; result = ((*lp->lp_ioctl)(ifp, cmd, data, cr)); } return (EINVAL); } /* * For direct output to child ports. */ static int lagg_port_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *ro) { struct lagg_port *lp = ifp->if_lagg; switch (dst->sa_family) { case pseudo_AF_HDRCMPLT: case AF_UNSPEC: return ((*lp->lp_output)(ifp, m, dst, ro)); } /* drop any other frames */ m_freem(m); return (ENETDOWN); } 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; #if 0 /* XXX */ /* If the ifnet is just being renamed, don't do anything. */ if (ifp->if_flags & IFF_RENAMING) return; #endif sc = lp->lp_softc; LAGG_WLOCK(sc); lp->lp_detaching = 1; lagg_port_destroy(lp, 1); LAGG_WUNLOCK(sc); } static void lagg_port2req(struct lagg_port *lp, struct lagg_reqport *rp) { struct lagg_softc *sc = lp->lp_softc; 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; if (sc->sc_portreq != NULL) (*sc->sc_portreq)(lp, (caddr_t)&rp->rp_psc); /* Add protocol specific flags */ switch (sc->sc_proto) { case LAGG_PROTO_FAILOVER: if (lp == sc->sc_primary) rp->rp_flags |= LAGG_PORT_MASTER; if (lp == lagg_link_active(sc, sc->sc_primary)) rp->rp_flags |= LAGG_PORT_ACTIVE; break; 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_isactive(lp)) rp->rp_flags |= LAGG_PORT_ACTIVE; if (lacp_iscollecting(lp)) rp->rp_flags |= LAGG_PORT_COLLECTING; if (lacp_isdistributing(lp)) rp->rp_flags |= LAGG_PORT_DISTRIBUTING; 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_flags & IFF_RUNNING) return; LAGG_WLOCK(sc); ifp->if_flags |= IFF_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_WUNLOCK(sc); } static void lagg_stop(struct lagg_softc *sc) { struct ifnet *ifp = sc->sc_ifp; LAGG_WLOCK_ASSERT(sc); if ((ifp->if_flags & IFF_RUNNING) == 0) return; ifp->if_flags &= ~IFF_RUNNING; if (sc->sc_stop != NULL) (*sc->sc_stop)(sc); } static int lagg_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) { 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 lagg_reqflags *rf = (struct lagg_reqflags *)data; struct ifreq *ifr = (struct ifreq *)data; struct lagg_port *lp; struct ifnet *tpif; char *buf, *outbuf; int count, buflen, len, error = 0; ASSERT_IFNET_SERIALIZED_ALL(ifp); bzero(&rpbuf, sizeof(rpbuf)); switch (cmd) { case SIOCGLAGG: LAGG_RLOCK(sc); count = 0; SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) count++; buflen = count * sizeof(struct lagg_reqport); LAGG_RUNLOCK(sc); outbuf = kmalloc(buflen, M_TEMP, M_WAITOK | M_ZERO); LAGG_RLOCK(sc); ra->ra_proto = sc->sc_proto; if (sc->sc_req != NULL) (*sc->sc_req)(sc, (caddr_t)&ra->ra_psc); count = 0; buf = outbuf; len = min(ra->ra_size, buflen); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { if (len < sizeof(rpbuf)) break; lagg_port2req(lp, &rpbuf); memcpy(buf, &rpbuf, sizeof(rpbuf)); count++; buf += sizeof(rpbuf); len -= sizeof(rpbuf); } LAGG_RUNLOCK(sc); ra->ra_ports = count; ra->ra_size = count * sizeof(rpbuf); error = copyout(outbuf, ra->ra_port, ra->ra_size); kfree(outbuf, M_TEMP); break; case SIOCSLAGG: error = caps_priv_check_self(SYSCAP_NONET_LAGG); if (error) break; if (ra->ra_proto >= LAGG_PROTO_MAX) { error = EPROTONOSUPPORT; break; } LAGG_WLOCK(sc); if (sc->sc_proto != LAGG_PROTO_NONE) { /* Reset protocol first in case detach unlocks */ sc->sc_proto = LAGG_PROTO_NONE; error = sc->sc_detach(sc); 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; sc->sc_req = NULL; sc->sc_portreq = NULL; } else if (sc->sc_input != NULL) { /* Still detaching */ error = EBUSY; } if (error != 0) { LAGG_WUNLOCK(sc); break; } for (int i = 0; i < (NELEM(lagg_protos)); i++) { if (lagg_protos[i].ti_proto == ra->ra_proto) { if (sc->sc_ifflags & IFF_DEBUG) kprintf("%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); LAGG_WUNLOCK(sc); return (error); } } LAGG_WUNLOCK(sc); error = EPROTONOSUPPORT; break; case SIOCGLAGGFLAGS: rf->rf_flags = sc->sc_flags; break; case SIOCSLAGGHASH: error = caps_priv_check_self(SYSCAP_NONET_LAGG); if (error) break; if ((rf->rf_flags & LAGG_F_HASHMASK) == 0) { error = EINVAL; break; } LAGG_WLOCK(sc); sc->sc_flags &= ~LAGG_F_HASHMASK; sc->sc_flags |= rf->rf_flags & LAGG_F_HASHMASK; LAGG_WUNLOCK(sc); break; case SIOCGLAGGPORT: /* * Release ifp serializers before ifnet_lock * to prevent lock order reversal. */ ifnet_deserialize_all(ifp); ifnet_lock(); if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { ifnet_unlock(); ifnet_serialize_all(ifp); error = EINVAL; break; } LAGG_RLOCK(sc); if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || lp->lp_softc != sc) { error = ENOENT; LAGG_RUNLOCK(sc); ifnet_unlock(); ifnet_serialize_all(ifp); break; } lagg_port2req(lp, rp); LAGG_RUNLOCK(sc); ifnet_unlock(); ifnet_serialize_all(ifp); break; case SIOCSLAGGPORT: error = caps_priv_check_self(SYSCAP_NONET_LAGG); if (error) break; /* * Release ifp serializers before ifnet_lock * to prevent lock order reversal. */ ifnet_deserialize_all(ifp); ifnet_lock(); if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { ifnet_unlock(); ifnet_serialize_all(ifp); error = EINVAL; break; } LAGG_WLOCK(sc); error = lagg_port_create(sc, tpif); LAGG_WUNLOCK(sc); ifnet_unlock(); ifnet_serialize_all(ifp); break; case SIOCSLAGGDELPORT: error = caps_priv_check_self(SYSCAP_NONET_LAGG); if (error) break; /* * Release ifp serializers before ifnet_lock * to prevent lock order reversal. */ ifnet_deserialize_all(ifp); ifnet_lock(); if (rp->rp_portname[0] == '\0' || (tpif = ifunit(rp->rp_portname)) == NULL) { ifnet_unlock(); ifnet_serialize_all(ifp); error = EINVAL; break; } LAGG_WLOCK(sc); if ((lp = (struct lagg_port *)tpif->if_lagg) == NULL || lp->lp_softc != sc) { error = ENOENT; LAGG_WUNLOCK(sc); ifnet_unlock(); ifnet_serialize_all(ifp); break; } error = lagg_port_destroy(lp, 1); LAGG_WUNLOCK(sc); ifnet_unlock(); ifnet_serialize_all(ifp); break; case SIOCSIFFLAGS: /* Set flags on ports too */ LAGG_WLOCK(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { lagg_setflags(lp, 1); } LAGG_WUNLOCK(sc); if (!(ifp->if_flags & IFF_UP) && (ifp->if_flags & IFF_RUNNING)) { /* * If interface is marked down and it is running, * then stop and disable it. */ LAGG_WLOCK(sc); lagg_stop(sc); LAGG_WUNLOCK(sc); } else if ((ifp->if_flags & IFF_UP) && !(ifp->if_flags & IFF_RUNNING)) { /* * If interface is marked up and it is stopped, then * start it. */ (*ifp->if_init)(sc); } break; case SIOCADDMULTI: case SIOCDELMULTI: LAGG_WLOCK(sc); error = lagg_ether_setmulti(sc); LAGG_WUNLOCK(sc); break; case SIOCSIFMEDIA: case SIOCGIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); break; case SIOCSIFCAP: case SIOCSIFMTU: /* Do not allow the MTU or caps to be directly changed */ error = EINVAL; break; default: error = ether_ioctl(ifp, cmd, data); break; } return (error); } static int lagg_ether_setmulti(struct lagg_softc *sc) { struct lagg_port *lp; LAGG_WLOCK_ASSERT(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { /* First, remove any existing filter entries. */ lagg_ether_cmdmulti(lp, 0); /* copy all addresses from the lagg interface to the port */ lagg_ether_cmdmulti(lp, 1); } return (0); } static int lagg_ether_cmdmulti(struct lagg_port *lp, int set) { struct lagg_softc *sc = lp->lp_softc; struct ifnet *ifp = lp->lp_ifp; struct ifnet *scifp = sc->sc_ifp; struct lagg_mc *mc; struct ifmultiaddr *ifma, *rifma = NULL; struct sockaddr_dl sdl; int error; ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); LAGG_WLOCK_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, &scifp->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 = kmalloc(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(ifp, (struct sockaddr *)mc->mc_ifma); kfree(mc, M_DEVBUF); } } return (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_softc; struct ifnet *scifp = sc->sc_ifp; struct ifnet *ifp = lp->lp_ifp; int error; LAGG_WLOCK_ASSERT(sc); ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp); status = status ? (scifp->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; ASSERT_IFNET_NOT_SERIALIZED_ALL(lp->lp_ifp); 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); } #if 0 /* XXX not needed? */ static int lagg_output(struct ifnet *ifp, struct mbuf *m) { struct lagg_softc *sc = ifp->if_softc; int error, len, mcast; len = m->m_pkthdr.len; mcast = (m->m_flags & (M_MCAST | M_BCAST)) ? 1 : 0; LAGG_RLOCK(sc); /* We need a Tx algorithm and at least one port */ if (sc->sc_proto == LAGG_PROTO_NONE || sc->sc_count == 0) { LAGG_RUNLOCK(sc); m_freem(m); ifp->if_oerrors++; return (ENXIO); } BPF_MTAP(ifp, m); error = (*sc->sc_start)(sc, m); LAGG_RUNLOCK(sc); if (error == 0) { IFNET_STAT_INC(ifp, opackets, 1); IFNET_STAT_INC(ifp, obytes, len); ifp->if_omcasts += mcast; } else ifp->if_oerrors++; return error; } #endif #if 0 /* XXX */ /* * The ifp->if_qflush entry point for lagg(4) is no-op. */ static void lagg_qflush(struct ifnet *ifp __unused) { } #endif static void lagg_input(struct ifnet *ifp, struct mbuf *m) { struct lagg_port *lp = ifp->if_lagg; struct lagg_softc *sc = lp->lp_softc; struct ifnet *scifp = sc->sc_ifp; LAGG_RLOCK(sc); if ((scifp->if_flags & IFF_RUNNING) == 0 || (lp->lp_flags & LAGG_PORT_DISABLED) || sc->sc_proto == LAGG_PROTO_NONE) { LAGG_RUNLOCK(sc); m_freem(m); return; } BPF_MTAP(scifp, m); m = (*sc->sc_input)(sc, lp, m); LAGG_RUNLOCK(sc); if (m != NULL) { IFNET_STAT_INC(ifp, ipackets, 1); IFNET_STAT_INC(ifp, ibytes, m->m_pkthdr.len); if (scifp->if_flags & IFF_MONITOR) { m_freem(m); m = NULL; } ether_reinput_oncpu(scifp, m, REINPUT_RUNBPF); } } static int lagg_media_change(struct ifnet *ifp) { struct lagg_softc *sc = (struct lagg_softc *)ifp->if_softc; if (sc->sc_ifflags & IFF_DEBUG) kprintf("%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_RLOCK(sc); SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { if (LAGG_PORTACTIVE(lp)) imr->ifm_status |= IFM_ACTIVE; } LAGG_RUNLOCK(sc); } static void lagg_linkstate(struct lagg_softc *sc) { struct lagg_port *lp; int new_link = LINK_STATE_DOWN; uint64_t speed; /* Our link is considered up if at least one of our ports is active */ SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) { if (lp->lp_link_state == LINK_STATE_UP) { new_link = LINK_STATE_UP; break; } } if_link_state_change(sc->sc_ifp); /* Update if_baudrate to reflect the max possible speed */ switch (sc->sc_proto) { case LAGG_PROTO_FAILOVER: sc->sc_ifp->if_baudrate = sc->sc_primary != NULL ? sc->sc_primary->lp_ifp->if_baudrate : 0; break; case LAGG_PROTO_ROUNDROBIN: case LAGG_PROTO_LOADBALANCE: case LAGG_PROTO_ETHERCHANNEL: speed = 0; SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) speed += lp->lp_ifp->if_baudrate; sc->sc_ifp->if_baudrate = speed; break; case LAGG_PROTO_LACP: /* LACP updates if_baudrate itself */ break; } } #if 0 /* XXX */ 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_softc; if (sc == NULL) return; LAGG_WLOCK(sc); lagg_linkstate(sc); if (sc->sc_linkstate != NULL) (*sc->sc_linkstate)(lp); LAGG_WUNLOCK(sc); } #endif 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_RLOCK_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); } static int lagg_sysctl_active(SYSCTL_HANDLER_ARGS) { struct lagg_softc *sc = (struct lagg_softc *)arg1; struct lagg_port *lp; int error; /* LACP tracks active links automatically, the others do not */ if (sc->sc_proto != LAGG_PROTO_LACP) { sc->sc_active = 0; SLIST_FOREACH(lp, &sc->sc_ports, lp_entries) sc->sc_active += LAGG_PORTACTIVE(lp); } error = sysctl_handle_int(oidp, &sc->sc_active, 0, req); if ((error) || (req->newptr == NULL)) return (error); return (0); } uint32_t lagg_hashmbuf(struct lagg_softc *sc, struct mbuf *m, uint32_t key) { uint16_t etype; uint32_t p = key; int off; struct ether_header *eh; const struct ether_vlan_header *vlan; #ifdef INET const struct ip *ip; const uint32_t *ports; int iphlen; #endif #ifdef INET6 const struct ip6_hdr *ip6; uint32_t flow; #endif union { #ifdef INET struct ip ip; #endif #ifdef INET6 struct ip6_hdr ip6; #endif struct ether_vlan_header vlan; uint32_t port; } buf; off = sizeof(*eh); if (m->m_len < off) goto out; eh = mtod(m, struct ether_header *); etype = ntohs(eh->ether_type); if (sc->sc_flags & LAGG_F_HASHL2) { p = hash32_buf(&eh->ether_shost, ETHER_ADDR_LEN, p); p = hash32_buf(&eh->ether_dhost, ETHER_ADDR_LEN, p); } /* Special handling for encapsulating VLAN frames */ #if 0 /* XXX */ if ((m->m_flags & M_VLANTAG) && (sc->sc_flags & LAGG_F_HASHL2)) { p = hash32_buf(&m->m_pkthdr.ether_vtag, sizeof(m->m_pkthdr.ether_vtag), p); } else #endif if (etype == ETHERTYPE_VLAN) { vlan = lagg_gethdr(m, off, sizeof(*vlan), &buf); if (vlan == NULL) goto out; if (sc->sc_flags & LAGG_F_HASHL2) 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), &buf); if (ip == NULL) goto out; if (sc->sc_flags & LAGG_F_HASHL3) { p = hash32_buf(&ip->ip_src, sizeof(struct in_addr), p); p = hash32_buf(&ip->ip_dst, sizeof(struct in_addr), p); } if (!(sc->sc_flags & LAGG_F_HASHL4)) break; switch (ip->ip_p) { case IPPROTO_TCP: case IPPROTO_UDP: iphlen = ip->ip_hl << 2; if (iphlen < sizeof(*ip)) break; off += iphlen; ports = lagg_gethdr(m, off, sizeof(*ports), &buf); if (ports == NULL) break; p = hash32_buf(ports, sizeof(*ports), p); break; } break; #endif #ifdef INET6 case ETHERTYPE_IPV6: if (!(sc->sc_flags & LAGG_F_HASHL3)) break; ip6 = lagg_gethdr(m, off, sizeof(*ip6), &buf); 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); flow = ip6->ip6_flow & IPV6_FLOWLABEL_MASK; p = hash32_buf(&flow, sizeof(flow), p); /* IPv6 flow label */ break; #endif } out: return (p); } static void lagg_start(struct ifnet *ifp, struct ifaltq_subque *ifsq) { struct lagg_softc *sc = ifp->if_softc; struct mbuf *m; struct ifnet *ifp_p; struct netmsg_packet *nmp; lwkt_port_t p_port; ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq); ASSERT_ALTQ_SQ_SERIALIZED_HW(ifsq); if (((ifp->if_flags & IFF_RUNNING) == 0) || (sc->sc_proto == LAGG_PROTO_NONE) || (sc->sc_count == 0)) { ifsq_purge(ifsq); return; } LAGG_RLOCK(sc); for (;;) { m = ifsq_dequeue(ifsq); if (m == NULL){ break; } // Choose output port ifp_p = (*sc->sc_select_tx_port)(sc, m); if (ifp_p == NULL) { ifsq_purge(ifsq); break; } p_port = netisr_cpuport( ifsq_get_cpuid(ifq_get_subq_default(&ifp_p->if_snd))); BPF_MTAP(ifp, m); nmp = &m->m_hdr.mh_netmsg; netmsg_init(&nmp->base, NULL, &netisr_apanic_rport, 0, lagg_start_dispatch); nmp->nm_packet = m; nmp->base.lmsg.u.ms_resultp = ifp_p; lwkt_sendmsg(p_port, &nmp->base.lmsg); IFNET_STAT_INC(ifp, opackets, 1); } LAGG_RUNLOCK(sc); } static void lagg_start_dispatch(netmsg_t msg) { struct netmsg_packet *nmp = &msg->packet; struct mbuf *m; struct ifnet *ifp; struct altq_pktattr pktattr; m = nmp->nm_packet; ifp = msg->lmsg.u.ms_resultp; M_ASSERTPKTHDR(m); /* Does altq mix with lacp? */ if (ifq_is_enabled(&ifp->if_snd)) altq_etherclassify(&ifp->if_snd, m, &pktattr); ifq_dispatch(ifp, m, &pktattr); } int lagg_enqueue(struct ifnet *ifp, struct mbuf *m) { struct altq_pktattr pktattr; if (ifq_is_enabled(&ifp->if_snd)) altq_etherclassify(&ifp->if_snd, m, &pktattr); ifq_dispatch(ifp, m, &pktattr); return 0; } /* * Simple round robin aggregation */ static int lagg_rr_attach(struct lagg_softc *sc) { sc->sc_detach = lagg_rr_detach; sc->sc_input = lagg_rr_input; sc->sc_select_tx_port = lagg_rr_select_tx_port; sc->sc_port_create = NULL; sc->sc_capabilities = IFCAP_LAGG_FULLDUPLEX; sc->sc_seq = 0; return (0); } static int lagg_rr_detach(struct lagg_softc *sc) { return (0); } static struct ifnet * lagg_rr_select_tx_port(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp; uint32_t p; p = atomic_fetchadd_32(&sc->sc_seq, 1); p %= sc->sc_count; lp = SLIST_FIRST(&sc->sc_ports); while (p--) lp = SLIST_NEXT(lp, lp_entries); /* * 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 (NULL); } return (lp->lp_ifp); } 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_select_tx_port = lagg_fail_select_tx_port; 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); } struct ifnet * lagg_fail_select_tx_port(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp; if ((lp = lagg_link_active(sc, sc->sc_primary)) == NULL) return NULL; return lp->lp_ifp; } 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 || lagg_failover_rx_all) { m->m_pkthdr.rcvif = ifp; return (m); } if (!LAGG_PORTACTIVE(sc->sc_primary)) { tmp_tp = lagg_link_active(sc, sc->sc_primary); /* * 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 *)kmalloc(sizeof(struct lagg_lb), M_DEVBUF, M_NOWAIT|M_ZERO)) == NULL) return (ENOMEM); sc->sc_detach = lagg_lb_detach; sc->sc_select_tx_port = lagg_lb_select_tx_port; 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 = karc4random(); 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) kfree(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) kprintf("%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_softc; return (lagg_lb_porttable(sc, NULL)); } static void lagg_lb_port_destroy(struct lagg_port *lp) { struct lagg_softc *sc = lp->lp_softc; lagg_lb_porttable(sc, lp); } struct ifnet * lagg_lb_select_tx_port(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; /* XXX if (sc->use_flowid && (m->m_flags & M_FLOWID)) p = m->m_pkthdr.flowid; else */ p = lagg_hashmbuf(sc, m, lb->lb_key); p %= sc->sc_count; lp = lb->lb_ports[p]; /* * 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 NULL; return lp->lp_ifp; } 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_select_tx_port = lagg_lacp_select_tx_port; sc->sc_input = lagg_lacp_input; sc->sc_init = lacp_init; sc->sc_stop = lacp_stop; sc->sc_lladdr = lagg_lacp_lladdr; sc->sc_req = lacp_req; sc->sc_portreq = lacp_portreq; 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_WUNLOCK(sc); error = lacp_detach(sc); LAGG_WLOCK(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); } struct ifnet * lagg_lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m) { struct lagg_port *lp; lp = lacp_select_tx_port(sc, m); if (lp == NULL) return NULL; return lp->lp_ifp; } 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; eh = mtod(m, struct ether_header *); etype = ntohs(eh->ether_type); /* Tap off LACP control messages */ if ((m->m_flags & M_VLANTAG) == 0 && etype == ETHERTYPE_SLOW) { m = lacp_input(lp, m); if (m == NULL) return (NULL); } /* * If the port is not collecting or not in the active aggregator then * free and return. */ if (lacp_iscollecting(lp) == 0 || lacp_isactive(lp) == 0) { m_freem(m); return (NULL); } m->m_pkthdr.rcvif = ifp; return (m); } static void lagg_callout(void *arg) { struct lagg_softc *sc = (struct lagg_softc *)arg; #if 0 /* XXX */ struct ifnet *ifp = sc->sc_ifp; ifp->if_ipackets = counter_u64_fetch(sc->sc_ipackets); ifp->if_opackets = counter_u64_fetch(sc->sc_opackets); ifp->if_ibytes = counter_u64_fetch(sc->sc_ibytes); ifp->if_obytes = counter_u64_fetch(sc->sc_obytes); #endif callout_reset(&sc->sc_callout, hz, lagg_callout, sc); }