/* $OpenBSD: if_aggr.c,v 1.27 2019/12/23 09:03:24 dlg Exp $ */ /* * Copyright (c) 2019 The University of Queensland * * 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. */ /* * This driver implements 802.1AX Link Aggregation (formerly 802.3ad) * * The specification describes systems with multiple ports that that * can dynamically form aggregations. The relationships between ports * and aggregations is such that arbitrary ports connected to ports * on other systems may move between aggregations, and there can be * as many aggregations as ports. An aggregation in this model is * effectively an interface, and becomes the point that Ethernet traffic * enters and leaves the system. The spec also contains a description * of the Link Aggregation Control Protocol (LACP) for use on the wire, * and how to process it and select ports and aggregations based on * it. * * This driver implements a simplified or constrained model where each * aggr(4) interface is effectively an independent system, and will * only support one aggregation. This supports the use of the kernel * interface as a static entity that is created and configured once, * and has the link "come up" when that one aggregation is selected * by the LACP protocol. */ /* * This code was written by David Gwynne as part * of the Information Technology Infrastructure Group (ITIG) in the * Faculty of Engineering, Architecture and Information Technology * (EAIT). */ /* * TODO: * * - add locking * - figure out the Ready_N and Ready logic */ #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* if_trunk.h uses siphash bits */ #include #if NBPFILTER > 0 #include #endif /* * Link Aggregation Control Protocol (LACP) */ struct ether_slowproto_hdr { uint8_t sph_subtype; uint8_t sph_version; } __packed; #define SLOWPROTOCOLS_SUBTYPE_LACP 1 #define SLOWPROTOCOLS_SUBTYPE_LACP_MARKER \ 2 #define LACP_VERSION 1 #define LACP_FAST_PERIODIC_TIME 1 #define LACP_SLOW_PERIODIC_TIME 30 #define LACP_TIMEOUT_FACTOR 3 #define LACP_AGGREGATION_WAIT_TIME 2 #define LACP_TX_MACHINE_RATE 3 /* per LACP_FAST_PERIODIC_TIME */ #define LACP_ADDR_C_BRIDGE { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 } #define LACP_ADDR_SLOW { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 } #define LACP_ADDR_NON_TPMR_BRIDGE { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x03 } struct lacp_tlv_hdr { uint8_t lacp_tlv_type; uint8_t lacp_tlv_length; } __packed __aligned(2); /* LACP TLV types */ #define LACP_T_TERMINATOR 0x00 #define LACP_T_ACTOR 0x01 #define LACP_T_PARTNER 0x02 #define LACP_T_COLLECTOR 0x03 /* LACPv2 TLV types */ #define LACP_T_PORT_ALGORITHM 0x04 #define LACP_T_PORT_CONVERSATION_ID_DIGEST \ 0x05 #define LACP_T_PORT_CONVERSATION_MASK 0x06 #define LACP_T_PORT_CONVERSATION_SERVICE_MAPPING \ 0x0a struct lacp_sysid { uint16_t lacp_sysid_priority; uint8_t lacp_sysid_mac[ETHER_ADDR_LEN]; } __packed __aligned(2); struct lacp_portid { uint16_t lacp_portid_priority; uint16_t lacp_portid_number; } __packed __aligned(2); struct lacp_port_info { struct lacp_sysid lacp_sysid; uint16_t lacp_key; struct lacp_portid lacp_portid; uint8_t lacp_state; uint8_t lacp_reserved[3]; } __packed __aligned(2); #define LACP_STATE_ACTIVITY (1 << 0) #define LACP_STATE_TIMEOUT (1 << 1) #define LACP_STATE_AGGREGATION (1 << 2) #define LACP_STATE_SYNC (1 << 3) #define LACP_STATE_COLLECTING (1 << 4) #define LACP_STATE_DISTRIBUTING (1 << 5) #define LACP_STATE_DEFAULTED (1 << 6) #define LACP_STATE_EXPIRED (1 << 7) struct lacp_collector_info { uint16_t lacp_maxdelay; uint8_t lacp_reserved[12]; } __packed __aligned(2); struct lacp_du { struct ether_slowproto_hdr lacp_du_sph; struct lacp_tlv_hdr lacp_actor_info_tlv; struct lacp_port_info lacp_actor_info; struct lacp_tlv_hdr lacp_partner_info_tlv; struct lacp_port_info lacp_partner_info; struct lacp_tlv_hdr lacp_collector_info_tlv; struct lacp_collector_info lacp_collector_info; /* other TLVs go here */ struct lacp_tlv_hdr lacp_terminator; uint8_t lacp_pad[50]; } __packed __aligned(2); /* Marker TLV types */ #define MARKER_T_INFORMATION 0x01 #define MARKER_T_RESPONSE 0x02 struct marker_info { uint16_t marker_requester_port; uint8_t marker_requester_system[ETHER_ADDR_LEN]; uint8_t marker_requester_txid[4]; uint8_t marker_pad[2]; } __packed __aligned(2); struct marker_pdu { struct ether_slowproto_hdr marker_sph; struct lacp_tlv_hdr marker_info_tlv; struct marker_info marker_info; struct lacp_tlv_hdr marker_terminator; uint8_t marker_pad[90]; } __packed __aligned(2); enum lacp_rxm_state { LACP_RXM_S_BEGIN = 0, LACP_RXM_S_INITIALIZE, LACP_RXM_S_PORT_DISABLED, LACP_RXM_S_EXPIRED, LACP_RXM_S_LACP_DISABLED, LACP_RXM_S_DEFAULTED, LACP_RXM_S_CURRENT, }; enum lacp_rxm_event { LACP_RXM_E_BEGIN, LACP_RXM_E_UCT, LACP_RXM_E_PORT_MOVED, LACP_RXM_E_NOT_PORT_MOVED, LACP_RXM_E_PORT_ENABLED, LACP_RXM_E_NOT_PORT_ENABLED, LACP_RXM_E_LACP_ENABLED, LACP_RXM_E_NOT_LACP_ENABLED, LACP_RXM_E_LACPDU, /* CtrlMuxN:M_UNITDATA.indication(LACPDU) */ LACP_RXM_E_TIMER_EXPIRED, /* current_while_timer expired */ }; enum lacp_mux_state { LACP_MUX_S_BEGIN = 0, LACP_MUX_S_DETACHED, LACP_MUX_S_WAITING, LACP_MUX_S_ATTACHED, LACP_MUX_S_DISTRIBUTING, LACP_MUX_S_COLLECTING, }; enum lacp_mux_event { LACP_MUX_E_BEGIN, LACP_MUX_E_SELECTED, LACP_MUX_E_STANDBY, LACP_MUX_E_UNSELECTED, LACP_MUX_E_READY, LACP_MUX_E_SYNC, LACP_MUX_E_NOT_SYNC, LACP_MUX_E_COLLECTING, LACP_MUX_E_NOT_COLLECTING, }; /* * LACP variables */ static const uint8_t lacp_address_slow[ETHER_ADDR_LEN] = LACP_ADDR_SLOW; static const char *lacp_rxm_state_names[] = { "BEGIN", "INITIALIZE", "PORT_DISABLED", "EXPIRED", "LACP_DISABLED", "DEFAULTED", "CURRENT", }; static const char *lacp_rxm_event_names[] = { "BEGIN", "UCT", "port_moved", "!port_moved", "port_enabled", "!port_enabled", "LACP_Enabled", "!LACP_Enabled", "LACPDU", "current_while_timer expired", }; static const char *lacp_mux_state_names[] = { "BEGIN", "DETACHED", "WAITING", "ATTACHED", "DISTRIBUTING", "COLLECTING", }; static const char *lacp_mux_event_names[] = { "BEGIN", "Selected == SELECTED", "Selected == STANDBY", "Selected == UNSELECTED", "Ready", "Partner.Sync", "! Partner.Sync", "Partner.Collecting", "! Partner.Collecting", }; /* * aggr interface */ #define AGGR_MAX_PORTS 32 #define AGGR_MAX_SLOW_PKTS (AGGR_MAX_PORTS * 3) struct aggr_multiaddr { TAILQ_ENTRY(aggr_multiaddr) m_entry; unsigned int m_refs; uint8_t m_addrlo[ETHER_ADDR_LEN]; uint8_t m_addrhi[ETHER_ADDR_LEN]; struct sockaddr_storage m_addr; }; TAILQ_HEAD(aggr_multiaddrs, aggr_multiaddr); struct aggr_softc; enum aggr_port_selected { AGGR_PORT_UNSELECTED, AGGR_PORT_SELECTED, AGGR_PORT_STANDBY, }; static const char *aggr_port_selected_names[] = { "UNSELECTED", "SELECTED", "STANDBY", }; struct aggr_port { struct ifnet *p_ifp0; uint8_t p_lladdr[ETHER_ADDR_LEN]; uint32_t p_mtu; int (*p_ioctl)(struct ifnet *, u_long, caddr_t); int (*p_output)(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); struct task p_lhook; struct task p_dhook; struct aggr_softc *p_aggr; TAILQ_ENTRY(aggr_port) p_entry; unsigned int p_collecting; unsigned int p_distributing; TAILQ_ENTRY(aggr_port) p_entry_distributing; TAILQ_ENTRY(aggr_port) p_entry_muxen; /* Partner information */ enum aggr_port_selected p_muxed; enum aggr_port_selected p_selected; /* Selected */ struct lacp_port_info p_partner; #define p_partner_state p_partner.lacp_state uint8_t p_actor_state; uint8_t p_lacp_timeout; struct timeout p_current_while_timer; struct timeout p_wait_while_timer; /* Receive machine */ enum lacp_rxm_state p_rxm_state; struct mbuf_queue p_rxm_mq; struct task p_rxm_task; /* Periodic Transmission machine */ struct timeout p_ptm_tx; /* Mux machine */ enum lacp_mux_state p_mux_state; /* Transmit machine */ int p_txm_log[LACP_TX_MACHINE_RATE]; unsigned int p_txm_slot; struct timeout p_txm_ntt; }; TAILQ_HEAD(aggr_port_list, aggr_port); struct aggr_map { struct ifnet *m_ifp0s[AGGR_MAX_PORTS]; }; struct aggr_softc { struct arpcom sc_ac; #define sc_if sc_ac.ac_if unsigned int sc_dead; unsigned int sc_promisc; struct ifmedia sc_media; struct aggr_multiaddrs sc_multiaddrs; unsigned int sc_mix; struct aggr_map sc_maps[2]; unsigned int sc_map_gen; struct aggr_map *sc_map; struct rwlock sc_lock; struct aggr_port_list sc_ports; struct aggr_port_list sc_distributing; struct aggr_port_list sc_muxen; unsigned int sc_nports; unsigned int sc_ndistributing; struct timeout sc_tick; uint8_t sc_lacp_mode; #define AGGR_LACP_MODE_PASSIVE 0 #define AGGR_LACP_MODE_ACTIVE 1 uint8_t sc_lacp_timeout; #define AGGR_LACP_TIMEOUT_SLOW 0 #define AGGR_LACP_TIMEOUT_FAST 1 uint16_t sc_lacp_prio; uint16_t sc_lacp_port_prio; struct lacp_sysid sc_partner_system; uint16_t sc_partner_key; }; #define DPRINTF(_sc, fmt...) do { \ if (ISSET((_sc)->sc_if.if_flags, IFF_DEBUG)) \ printf(fmt); \ } while (0) static const unsigned int aggr_periodic_times[] = { [AGGR_LACP_TIMEOUT_SLOW] = LACP_SLOW_PERIODIC_TIME, [AGGR_LACP_TIMEOUT_FAST] = LACP_FAST_PERIODIC_TIME, }; static int aggr_clone_create(struct if_clone *, int); static int aggr_clone_destroy(struct ifnet *); static int aggr_ioctl(struct ifnet *, u_long, caddr_t); static void aggr_start(struct ifqueue *); static int aggr_enqueue(struct ifnet *, struct mbuf *); static int aggr_media_change(struct ifnet *); static void aggr_media_status(struct ifnet *, struct ifmediareq *); static int aggr_up(struct aggr_softc *); static int aggr_down(struct aggr_softc *); static int aggr_iff(struct aggr_softc *); static void aggr_p_linkch(void *); static void aggr_p_detach(void *); static int aggr_p_ioctl(struct ifnet *, u_long, caddr_t); static int aggr_p_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static int aggr_get_trunk(struct aggr_softc *, struct trunk_reqall *); static int aggr_set_options(struct aggr_softc *, const struct trunk_opts *); static int aggr_get_options(struct aggr_softc *, struct trunk_opts *); static int aggr_set_lladdr(struct aggr_softc *, const struct ifreq *); static int aggr_set_mtu(struct aggr_softc *, uint32_t); static void aggr_p_dtor(struct aggr_softc *, struct aggr_port *, const char *); static int aggr_p_setlladdr(struct aggr_port *, const uint8_t *); static int aggr_p_set_mtu(struct aggr_port *, uint32_t); static int aggr_add_port(struct aggr_softc *, const struct trunk_reqport *); static int aggr_get_port(struct aggr_softc *, struct trunk_reqport *); static int aggr_del_port(struct aggr_softc *, const struct trunk_reqport *); static int aggr_group(struct aggr_softc *, struct aggr_port *, u_long); static int aggr_multi(struct aggr_softc *, struct aggr_port *, const struct aggr_multiaddr *, u_long); static uint32_t aggr_hardmtu(struct aggr_softc *); static void aggr_set_lacp_mode(struct aggr_softc *, int); static void aggr_set_lacp_timeout(struct aggr_softc *, int); static int aggr_multi_add(struct aggr_softc *, struct ifreq *); static int aggr_multi_del(struct aggr_softc *, struct ifreq *); static void aggr_map(struct aggr_softc *); static void aggr_record_default(struct aggr_softc *, struct aggr_port *); static void aggr_current_while_timer(void *); static void aggr_wait_while_timer(void *); static void aggr_rx(void *); static void aggr_rxm_ev(struct aggr_softc *, struct aggr_port *, enum lacp_rxm_event, const struct lacp_du *); #define aggr_rxm(_sc, _p, _ev) \ aggr_rxm_ev((_sc), (_p), (_ev), NULL) #define aggr_rxm_lacpdu(_sc, _p, _lacpdu) \ aggr_rxm_ev((_sc), (_p), LACP_RXM_E_LACPDU, (_lacpdu)) static void aggr_mux(struct aggr_softc *, struct aggr_port *, enum lacp_mux_event); static int aggr_mux_ev(struct aggr_softc *, struct aggr_port *, enum lacp_mux_event, int *); static void aggr_set_partner_timeout(struct aggr_port *, int); static void aggr_ptm_tx(void *); static void aggr_transmit_machine(void *); static void aggr_ntt(struct aggr_port *); static void aggr_ntt_transmit(struct aggr_port *); static void aggr_set_selected(struct aggr_port *, enum aggr_port_selected, enum lacp_mux_event); static void aggr_unselected(struct aggr_port *); static void aggr_selection_logic(struct aggr_softc *, struct aggr_port *); #define ETHER_IS_SLOWADDR(_a) ETHER_IS_EQ((_a), lacp_address_slow) static struct if_clone aggr_cloner = IF_CLONE_INITIALIZER("aggr", aggr_clone_create, aggr_clone_destroy); void aggrattach(int count) { if_clone_attach(&aggr_cloner); } static int aggr_clone_create(struct if_clone *ifc, int unit) { struct aggr_softc *sc; struct ifnet *ifp; sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO|M_CANFAIL); if (sc == NULL) return (ENOMEM); sc->sc_mix = arc4random(); ifp = &sc->sc_if; snprintf(ifp->if_xname, sizeof(ifp->if_xname), "%s%d", ifc->ifc_name, unit); TAILQ_INIT(&sc->sc_multiaddrs); rw_init(&sc->sc_lock, "aggrlk"); TAILQ_INIT(&sc->sc_ports); sc->sc_nports = 0; TAILQ_INIT(&sc->sc_distributing); sc->sc_ndistributing = 0; TAILQ_INIT(&sc->sc_muxen); sc->sc_map_gen = 0; sc->sc_map = NULL; /* no links yet */ sc->sc_lacp_mode = AGGR_LACP_MODE_ACTIVE; sc->sc_lacp_timeout = AGGR_LACP_TIMEOUT_SLOW; sc->sc_lacp_prio = 0x8000; /* medium */ sc->sc_lacp_port_prio = 0x8000; /* medium */ ifmedia_init(&sc->sc_media, 0, aggr_media_change, aggr_media_status); ifmedia_add(&sc->sc_media, IFM_ETHER | IFM_AUTO, 0, NULL); ifmedia_set(&sc->sc_media, IFM_ETHER | IFM_AUTO); ifp->if_softc = sc; ifp->if_hardmtu = ETHER_MAX_HARDMTU_LEN; ifp->if_ioctl = aggr_ioctl; ifp->if_qstart = aggr_start; ifp->if_enqueue = aggr_enqueue; ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST | IFF_SIMPLEX; ifp->if_xflags = IFXF_CLONED | IFXF_MPSAFE; ifp->if_link_state = LINK_STATE_DOWN; IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN); ether_fakeaddr(ifp); if_counters_alloc(ifp); if_attach(ifp); ether_ifattach(ifp); ifp->if_llprio = IFQ_MAXPRIO; return (0); } static int aggr_clone_destroy(struct ifnet *ifp) { struct aggr_softc *sc = ifp->if_softc; struct aggr_port *p; NET_LOCK(); sc->sc_dead = 1; if (ISSET(ifp->if_flags, IFF_RUNNING)) aggr_down(sc); NET_UNLOCK(); ether_ifdetach(ifp); if_detach(ifp); /* last ref, no need to lock. aggr_p_dtor locks anyway */ while ((p = TAILQ_FIRST(&sc->sc_ports)) != NULL) aggr_p_dtor(sc, p, "destroy"); free(sc, M_DEVBUF, sizeof(*sc)); return (0); } /* * LACP_Enabled */ static inline int aggr_lacp_enabled(struct aggr_softc *sc) { struct ifnet *ifp = &sc->sc_if; return (ISSET(ifp->if_flags, IFF_RUNNING)); } /* * port_enabled */ static int aggr_port_enabled(struct aggr_port *p) { struct ifnet *ifp0 = p->p_ifp0; if (!ISSET(ifp0->if_flags, IFF_RUNNING)) return (0); if (!LINK_STATE_IS_UP(ifp0->if_link_state)) return (0); return (1); } /* * port_moved * * This variable is set to TRUE if the Receive machine for an Aggregation * Port is in the PORT_DISABLED state, and the combination of * Partner_Oper_System and Partner_Oper_Port_Number in use by that * Aggregation Port has been received in an incoming LACPDU on a * different Aggregation Port. This variable is set to FALSE once the * INITIALIZE state of the Receive machine has set the Partner information * for the Aggregation Port to administrative default values. * * Value: Boolean */ static int aggr_port_moved(struct aggr_softc *sc, struct aggr_port *p) { return (0); } static void aggr_transmit(struct aggr_softc *sc, const struct aggr_map *map, struct mbuf *m) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0; uint16_t flow = 0; #if NBPFILTER > 0 { caddr_t if_bpf = ifp->if_bpf; if (if_bpf) bpf_mtap_ether(if_bpf, m, BPF_DIRECTION_OUT); } #endif if (ISSET(m->m_pkthdr.ph_flowid, M_FLOWID_VALID)) flow = m->m_pkthdr.ph_flowid; ifp0 = map->m_ifp0s[flow % AGGR_MAX_PORTS]; if (if_enqueue(ifp0, m) != 0) counters_inc(ifp->if_counters, ifc_oerrors); } static int aggr_enqueue(struct ifnet *ifp, struct mbuf *m) { struct aggr_softc *sc; const struct aggr_map *map; int error = 0; if (!ifq_is_priq(&ifp->if_snd)) return (if_enqueue_ifq(ifp, m)); sc = ifp->if_softc; smr_read_enter(); map = SMR_PTR_GET(&sc->sc_map); if (__predict_false(map == NULL)) { m_freem(m); error = ENETDOWN; } else { counters_pkt(ifp->if_counters, ifc_opackets, ifc_obytes, m->m_pkthdr.len); aggr_transmit(sc, map, m); } smr_read_leave(); return (error); } static void aggr_start(struct ifqueue *ifq) { struct ifnet *ifp = ifq->ifq_if; struct aggr_softc *sc = ifp->if_softc; const struct aggr_map *map; smr_read_enter(); map = SMR_PTR_GET(&sc->sc_map); if (__predict_false(map == NULL)) ifq_purge(ifq); else { struct mbuf *m; while ((m = ifq_dequeue(ifq)) != NULL) aggr_transmit(sc, map, m); } smr_read_leave(); } static inline int aggr_eh_is_slow(const struct ether_header *eh) { return (ETHER_IS_SLOWADDR(eh->ether_dhost) && eh->ether_type == htons(ETHERTYPE_SLOW)); } static int aggr_input(struct ifnet *ifp0, struct mbuf *m, void *cookie) { struct ether_header *eh; struct aggr_port *p = cookie; struct aggr_softc *sc = p->p_aggr; struct ifnet *ifp = &sc->sc_if; int hlen = sizeof(*eh); if (!ISSET(ifp->if_flags, IFF_RUNNING)) goto drop; eh = mtod(m, struct ether_header *); if (!ISSET(m->m_flags, M_VLANTAG) && __predict_false(aggr_eh_is_slow(eh))) { struct ether_slowproto_hdr *sph; hlen += sizeof(*sph); if (m->m_len < hlen) { m = m_pullup(m, hlen); if (m == NULL) { /* short++ */ return (1); } eh = mtod(m, struct ether_header *); } sph = (struct ether_slowproto_hdr *)(eh + 1); switch (sph->sph_subtype) { case SLOWPROTOCOLS_SUBTYPE_LACP: case SLOWPROTOCOLS_SUBTYPE_LACP_MARKER: if (mq_enqueue(&p->p_rxm_mq, m) == 0) task_add(systq, &p->p_rxm_task); return (1); default: break; } } if (__predict_false(!p->p_collecting)) goto drop; if (!ISSET(m->m_pkthdr.ph_flowid, M_FLOWID_VALID)) { m->m_pkthdr.ph_flowid = M_FLOWID_VALID | (ifp0->if_index ^ sc->sc_mix); } if_vinput(ifp, m); return (1); drop: m_freem(m); return (1); } static int aggr_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data) { struct aggr_softc *sc = ifp->if_softc; struct ifreq *ifr = (struct ifreq *)data; int error = 0; if (sc->sc_dead) return (ENXIO); switch (cmd) { case SIOCSIFADDR: break; case SIOCSIFFLAGS: if (ISSET(ifp->if_flags, IFF_UP)) { if (!ISSET(ifp->if_flags, IFF_RUNNING)) error = aggr_up(sc); else error = ENETRESET; } else { if (ISSET(ifp->if_flags, IFF_RUNNING)) error = aggr_down(sc); } break; case SIOCSIFLLADDR: error = aggr_set_lladdr(sc, ifr); break; case SIOCSTRUNK: error = suser(curproc); if (error != 0) break; if (((struct trunk_reqall *)data)->ra_proto != TRUNK_PROTO_LACP) { error = EPROTONOSUPPORT; break; } /* nop */ break; case SIOCGTRUNK: error = aggr_get_trunk(sc, (struct trunk_reqall *)data); break; case SIOCSTRUNKOPTS: error = suser(curproc); if (error != 0) break; error = aggr_set_options(sc, (struct trunk_opts *)data); break; case SIOCGTRUNKOPTS: error = aggr_get_options(sc, (struct trunk_opts *)data); break; case SIOCGTRUNKPORT: error = aggr_get_port(sc, (struct trunk_reqport *)data); break; case SIOCSTRUNKPORT: error = suser(curproc); if (error != 0) break; error = aggr_add_port(sc, (struct trunk_reqport *)data); break; case SIOCSTRUNKDELPORT: error = suser(curproc); if (error != 0) break; error = aggr_del_port(sc, (struct trunk_reqport *)data); break; case SIOCSIFMTU: error = aggr_set_mtu(sc, ifr->ifr_mtu); break; case SIOCADDMULTI: error = aggr_multi_add(sc, ifr); break; case SIOCDELMULTI: error = aggr_multi_del(sc, ifr); break; case SIOCSIFMEDIA: error = EOPNOTSUPP; break; case SIOCGIFMEDIA: error = ifmedia_ioctl(ifp, ifr, &sc->sc_media, cmd); break; default: error = ether_ioctl(ifp, &sc->sc_ac, cmd, data); break; } if (error == ENETRESET) error = aggr_iff(sc); return (error); } static int aggr_get_trunk(struct aggr_softc *sc, struct trunk_reqall *ra) { struct ifnet *ifp = &sc->sc_if; struct trunk_reqport rp; struct aggr_port *p; size_t size = ra->ra_size; caddr_t ubuf = (caddr_t)ra->ra_port; struct lacp_opreq *req; uint8_t state = 0; int error = 0; if (sc->sc_lacp_mode == AGGR_LACP_MODE_ACTIVE) SET(state, LACP_STATE_ACTIVITY); if (sc->sc_lacp_timeout == AGGR_LACP_TIMEOUT_FAST) SET(state, LACP_STATE_TIMEOUT); ra->ra_proto = TRUNK_PROTO_LACP; memset(&ra->ra_psc, 0, sizeof(ra->ra_psc)); /* * aggr(4) does not support Individual links so don't bother * with portprio, portno, and state, as per the spec. */ req = &ra->ra_lacpreq; req->actor_prio = sc->sc_lacp_prio; CTASSERT(sizeof(req->actor_mac) == sizeof(sc->sc_ac.ac_enaddr)); memcpy(req->actor_mac, &sc->sc_ac.ac_enaddr, sizeof(req->actor_mac)); req->actor_key = ifp->if_index; req->actor_state = state; req->partner_prio = ntohs(sc->sc_partner_system.lacp_sysid_priority); CTASSERT(sizeof(req->partner_mac) == sizeof(sc->sc_partner_system.lacp_sysid_mac)); memcpy(req->partner_mac, sc->sc_partner_system.lacp_sysid_mac, sizeof(req->partner_mac)); req->partner_key = ntohs(sc->sc_partner_key); ra->ra_ports = sc->sc_nports; TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { struct ifnet *ifp0; struct lacp_opreq *opreq; if (size < sizeof(rp)) break; ifp0 = p->p_ifp0; CTASSERT(sizeof(rp.rp_ifname) == sizeof(ifp->if_xname)); CTASSERT(sizeof(rp.rp_portname) == sizeof(ifp0->if_xname)); memset(&rp, 0, sizeof(rp)); memcpy(rp.rp_ifname, ifp->if_xname, sizeof(rp.rp_ifname)); memcpy(rp.rp_portname, ifp0->if_xname, sizeof(rp.rp_portname)); if (p->p_muxed) SET(rp.rp_flags, TRUNK_PORT_ACTIVE); if (p->p_collecting) SET(rp.rp_flags, TRUNK_PORT_COLLECTING); if (p->p_distributing) SET(rp.rp_flags, TRUNK_PORT_DISTRIBUTING); if (!aggr_port_enabled(p)) SET(rp.rp_flags, TRUNK_PORT_DISABLED); opreq = &rp.rp_lacpreq; opreq->actor_prio = sc->sc_lacp_prio; memcpy(opreq->actor_mac, &sc->sc_ac.ac_enaddr, sizeof(req->actor_mac)); opreq->actor_key = ifp->if_index; opreq->actor_portprio = sc->sc_lacp_port_prio; opreq->actor_portno = ifp0->if_index; opreq->actor_state = state | p->p_actor_state; opreq->partner_prio = ntohs(p->p_partner.lacp_sysid.lacp_sysid_priority); CTASSERT(sizeof(opreq->partner_mac) == sizeof(p->p_partner.lacp_sysid.lacp_sysid_mac)); memcpy(opreq->partner_mac, p->p_partner.lacp_sysid.lacp_sysid_mac, sizeof(opreq->partner_mac)); opreq->partner_key = ntohs(p->p_partner.lacp_key); opreq->partner_portprio = ntohs(p->p_partner.lacp_portid.lacp_portid_priority); opreq->partner_portno = ntohs(p->p_partner.lacp_portid.lacp_portid_number); opreq->partner_state = p->p_partner_state; error = copyout(&rp, ubuf, sizeof(rp)); if (error != 0) break; ubuf += sizeof(rp); size -= sizeof(rp); } return (error); } static int aggr_get_options(struct aggr_softc *sc, struct trunk_opts *tro) { struct lacp_adminopts *opt = &tro->to_lacpopts; if (tro->to_proto != TRUNK_PROTO_LACP) return (EPROTONOSUPPORT); opt->lacp_mode = sc->sc_lacp_mode; opt->lacp_timeout = sc->sc_lacp_timeout; opt->lacp_prio = sc->sc_lacp_prio; opt->lacp_portprio = sc->sc_lacp_port_prio; opt->lacp_ifqprio = sc->sc_if.if_llprio; return (0); } static int aggr_set_options(struct aggr_softc *sc, const struct trunk_opts *tro) { const struct lacp_adminopts *opt = &tro->to_lacpopts; if (tro->to_proto != TRUNK_PROTO_LACP) return (EPROTONOSUPPORT); switch (tro->to_opts) { case TRUNK_OPT_LACP_MODE: switch (opt->lacp_mode) { case AGGR_LACP_MODE_PASSIVE: case AGGR_LACP_MODE_ACTIVE: break; default: return (EINVAL); } aggr_set_lacp_mode(sc, opt->lacp_mode); break; case TRUNK_OPT_LACP_TIMEOUT: if (opt->lacp_timeout > nitems(aggr_periodic_times) || aggr_periodic_times[opt->lacp_timeout] == 0) return (EINVAL); aggr_set_lacp_timeout(sc, opt->lacp_timeout); break; case TRUNK_OPT_LACP_SYS_PRIO: if (opt->lacp_prio == 0) return (EINVAL); sc->sc_lacp_prio = opt->lacp_prio; break; case TRUNK_OPT_LACP_PORT_PRIO: if (opt->lacp_portprio == 0) return (EINVAL); sc->sc_lacp_port_prio = opt->lacp_portprio; break; default: return (ENODEV); } return (0); } static int aggr_add_port(struct aggr_softc *sc, const struct trunk_reqport *rp) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0; struct arpcom *ac0; struct aggr_port *p; struct aggr_multiaddr *ma; uint32_t hardmtu; int past = ticks - (hz * LACP_TIMEOUT_FACTOR); int i; int error; NET_ASSERT_LOCKED(); if (sc->sc_nports > AGGR_MAX_PORTS) return (ENOSPC); ifp0 = ifunit(rp->rp_portname); if (ifp0 == NULL || ifp0->if_index == ifp->if_index) return (EINVAL); if (ifp0->if_type != IFT_ETHER) return (EPROTONOSUPPORT); hardmtu = ifp0->if_hardmtu; if (hardmtu < ifp->if_mtu) return (ENOBUFS); if (ifp->if_hardmtu < hardmtu) hardmtu = ifp->if_hardmtu; ac0 = (struct arpcom *)ifp0; if (ac0->ac_trunkport != NULL) return (EBUSY); /* let's try */ ifp0 = if_get(ifp0->if_index); /* get an actual reference */ if (ifp0 == NULL) { /* XXX this should never happen */ return (EINVAL); } p = malloc(sizeof(*p), M_DEVBUF, M_WAITOK|M_ZERO|M_CANFAIL); if (p == NULL) { error = ENOMEM; goto put; } for (i = 0; i < nitems(p->p_txm_log); i++) p->p_txm_log[i] = past; p->p_ifp0 = ifp0; p->p_aggr = sc; p->p_mtu = ifp0->if_mtu; CTASSERT(sizeof(p->p_lladdr) == sizeof(ac0->ac_enaddr)); memcpy(p->p_lladdr, ac0->ac_enaddr, sizeof(p->p_lladdr)); p->p_ioctl = ifp0->if_ioctl; p->p_output = ifp0->if_output; error = aggr_group(sc, p, SIOCADDMULTI); if (error != 0) goto free; error = aggr_p_setlladdr(p, sc->sc_ac.ac_enaddr); if (error != 0) goto ungroup; error = aggr_p_set_mtu(p, ifp->if_mtu); if (error != 0) goto resetlladdr; if (sc->sc_promisc) { error = ifpromisc(ifp0, 1); if (error != 0) goto unmtu; } TAILQ_FOREACH(ma, &sc->sc_multiaddrs, m_entry) { if (aggr_multi(sc, p, ma, SIOCADDMULTI) != 0) { log(LOG_WARNING, "%s %s: " "unable to add multicast address\n", ifp->if_xname, ifp0->if_xname); } } task_set(&p->p_lhook, aggr_p_linkch, p); if_linkstatehook_add(ifp0, &p->p_lhook); task_set(&p->p_dhook, aggr_p_detach, p); if_detachhook_add(ifp0, &p->p_dhook); task_set(&p->p_rxm_task, aggr_rx, p); mq_init(&p->p_rxm_mq, 3, IPL_NET); timeout_set_proc(&p->p_ptm_tx, aggr_ptm_tx, p); timeout_set_proc(&p->p_txm_ntt, aggr_transmit_machine, p); timeout_set_proc(&p->p_current_while_timer, aggr_current_while_timer, p); timeout_set_proc(&p->p_wait_while_timer, aggr_wait_while_timer, p); p->p_muxed = 0; p->p_collecting = 0; p->p_distributing = 0; p->p_selected = AGGR_PORT_UNSELECTED; p->p_actor_state = LACP_STATE_AGGREGATION; /* commit */ DPRINTF(sc, "%s %s trunkport: creating port\n", ifp->if_xname, ifp0->if_xname); ifp->if_hardmtu = hardmtu; TAILQ_INSERT_TAIL(&sc->sc_ports, p, p_entry); sc->sc_nports++; ac0->ac_trunkport = p; /* make sure p is visible before handlers can run */ membar_producer(); ifp0->if_ioctl = aggr_p_ioctl; ifp0->if_output = aggr_p_output; if_ih_insert(ifp0, aggr_input, p); aggr_mux(sc, p, LACP_MUX_E_BEGIN); aggr_rxm(sc, p, LACP_RXM_E_BEGIN); aggr_p_linkch(p); return (0); unmtu: if (aggr_p_set_mtu(p, p->p_mtu) != 0) { log(LOG_WARNING, "%s add %s: unable to reset mtu %u\n", ifp->if_xname, ifp0->if_xname, p->p_mtu); } resetlladdr: if (aggr_p_setlladdr(p, p->p_lladdr) != 0) { log(LOG_WARNING, "%s add %s: unable to reset lladdr\n", ifp->if_xname, ifp0->if_xname); } ungroup: if (aggr_group(sc, p, SIOCDELMULTI) != 0) { log(LOG_WARNING, "%s add %s: " "unable to remove LACP group address\n", ifp->if_xname, ifp0->if_xname); } free: free(p, M_DEVBUF, sizeof(*p)); put: if_put(ifp0); return (error); } static struct aggr_port * aggr_trunkport(struct aggr_softc *sc, const char *name) { struct aggr_port *p; TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (strcmp(p->p_ifp0->if_xname, name) == 0) return (p); } return (NULL); } static int aggr_get_port(struct aggr_softc *sc, struct trunk_reqport *rp) { struct aggr_port *p; NET_ASSERT_LOCKED(); p = aggr_trunkport(sc, rp->rp_portname); if (p == NULL) return (EINVAL); /* XXX */ return (0); } static int aggr_del_port(struct aggr_softc *sc, const struct trunk_reqport *rp) { struct aggr_port *p; NET_ASSERT_LOCKED(); p = aggr_trunkport(sc, rp->rp_portname); if (p == NULL) return (EINVAL); aggr_p_dtor(sc, p, "del"); return (0); } static int aggr_p_setlladdr(struct aggr_port *p, const uint8_t *addr) { struct ifnet *ifp0 = p->p_ifp0; struct ifreq ifr; struct sockaddr *sa; int error; memset(&ifr, 0, sizeof(ifr)); CTASSERT(sizeof(ifr.ifr_name) == sizeof(ifp0->if_xname)); memcpy(ifr.ifr_name, ifp0->if_xname, sizeof(ifr.ifr_name)); sa = &ifr.ifr_addr; /* wtf is this? */ sa->sa_len = ETHER_ADDR_LEN; sa->sa_family = AF_LINK; CTASSERT(sizeof(sa->sa_data) >= ETHER_ADDR_LEN); memcpy(sa->sa_data, addr, ETHER_ADDR_LEN); error = (*p->p_ioctl)(ifp0, SIOCSIFLLADDR, (caddr_t)&ifr); switch (error) { case ENOTTY: case 0: break; default: return (error); } error = if_setlladdr(ifp0, addr); if (error != 0) return (error); ifnewlladdr(ifp0); return (0); } static int aggr_p_set_mtu(struct aggr_port *p, uint32_t mtu) { struct ifnet *ifp0 = p->p_ifp0; struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); CTASSERT(sizeof(ifr.ifr_name) == sizeof(ifp0->if_xname)); memcpy(ifr.ifr_name, ifp0->if_xname, sizeof(ifr.ifr_name)); ifr.ifr_mtu = mtu; return ((*p->p_ioctl)(ifp0, SIOCSIFMTU, (caddr_t)&ifr)); } static int aggr_p_ioctl(struct ifnet *ifp0, u_long cmd, caddr_t data) { struct arpcom *ac0 = (struct arpcom *)ifp0; struct aggr_port *p = ac0->ac_trunkport; struct ifreq *ifr = (struct ifreq *)data; int error = 0; switch (cmd) { case SIOCGTRUNKPORT: { struct trunk_reqport *rp = (struct trunk_reqport *)data; struct aggr_softc *sc = p->p_aggr; struct ifnet *ifp = &sc->sc_if; if (strncmp(rp->rp_ifname, rp->rp_portname, sizeof(rp->rp_ifname)) != 0) return (EINVAL); CTASSERT(sizeof(rp->rp_ifname) == sizeof(ifp->if_xname)); memcpy(rp->rp_ifname, ifp->if_xname, sizeof(rp->rp_ifname)); break; } case SIOCSIFMTU: if (ifr->ifr_mtu == ifp0->if_mtu) break; /* nop */ /* FALLTHROUGH */ case SIOCSIFLLADDR: error = EBUSY; break; case SIOCSIFFLAGS: if (!ISSET(ifp0->if_flags, IFF_UP) && ISSET(ifp0->if_flags, IFF_RUNNING)) { /* port is going down */ if (p->p_selected == AGGR_PORT_SELECTED) { aggr_unselected(p); aggr_ntt_transmit(p); /* XXX */ } } /* FALLTHROUGH */ default: error = (*p->p_ioctl)(ifp0, cmd, data); break; } return (error); } static int aggr_p_output(struct ifnet *ifp0, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt) { struct arpcom *ac0 = (struct arpcom *)ifp0; struct aggr_port *p = ac0->ac_trunkport; /* restrict transmission to bpf only */ if ((m_tag_find(m, PACKET_TAG_DLT, NULL) == NULL)) { m_freem(m); return (EBUSY); } return ((*p->p_output)(ifp0, m, dst, rt)); } static void aggr_p_dtor(struct aggr_softc *sc, struct aggr_port *p, const char *op) { struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0 = p->p_ifp0; struct arpcom *ac0 = (struct arpcom *)ifp0; struct aggr_multiaddr *ma; enum aggr_port_selected selected; int error; DPRINTF(sc, "%s %s %s: destroying port\n", ifp->if_xname, ifp0->if_xname, op); selected = p->p_selected; aggr_rxm(sc, p, LACP_RXM_E_NOT_PORT_ENABLED); aggr_unselected(p); if (aggr_port_enabled(p) && selected == AGGR_PORT_SELECTED) aggr_ntt_transmit(p); timeout_del(&p->p_ptm_tx); timeout_del_barrier(&p->p_txm_ntt); /* XXX */ timeout_del(&p->p_current_while_timer); timeout_del(&p->p_wait_while_timer); if_ih_remove(ifp0, aggr_input, p); ac0->ac_trunkport = NULL; ifp0->if_ioctl = p->p_ioctl; ifp0->if_output = p->p_output; TAILQ_REMOVE(&sc->sc_ports, p, p_entry); sc->sc_nports--; TAILQ_FOREACH(ma, &sc->sc_multiaddrs, m_entry) { error = aggr_multi(sc, p, ma, SIOCDELMULTI); if (error != 0) { log(LOG_WARNING, "%s %s %s: " "unable to remove multicast address (%d)\n", ifp->if_xname, op, ifp0->if_xname, error); } } if (sc->sc_promisc) { error = ifpromisc(ifp0, 0); if (error != 0) { log(LOG_WARNING, "%s %s %s: " "unable to disable promisc (%d)\n", ifp->if_xname, op, ifp0->if_xname, error); } } error = aggr_p_set_mtu(p, p->p_mtu); if (error != 0) { log(LOG_WARNING, "%s %s %s: unable to restore mtu %u (%d)\n", ifp->if_xname, op, ifp0->if_xname, p->p_mtu, error); } error = aggr_p_setlladdr(p, p->p_lladdr); if (error != 0) { log(LOG_WARNING, "%s %s %s: unable to restore lladdr (%d)\n", ifp->if_xname, op, ifp0->if_xname, error); } error = aggr_group(sc, p, SIOCDELMULTI); if (error != 0) { log(LOG_WARNING, "%s %s %s: " "unable to remove LACP group address (%d)\n", ifp->if_xname, op, ifp0->if_xname, error); } if_detachhook_del(ifp0, &p->p_dhook); if_linkstatehook_del(ifp0, &p->p_lhook); if_put(ifp0); free(p, M_DEVBUF, sizeof(*p)); /* XXX this is a pretty ugly place to update this */ ifp->if_hardmtu = aggr_hardmtu(sc); } static void aggr_p_detach(void *arg) { struct aggr_port *p = arg; struct aggr_softc *sc = p->p_aggr; aggr_p_dtor(sc, p, "detach"); NET_ASSERT_LOCKED(); } static void aggr_p_linkch(void *arg) { struct aggr_port *p = arg; struct aggr_softc *sc = p->p_aggr; NET_ASSERT_LOCKED(); if (aggr_port_enabled(p)) { aggr_rxm(sc, p, LACP_RXM_E_PORT_ENABLED); if (aggr_lacp_enabled(sc)) { timeout_add_sec(&p->p_ptm_tx, aggr_periodic_times[AGGR_LACP_TIMEOUT_FAST]); } } else { aggr_rxm(sc, p, LACP_RXM_E_NOT_PORT_ENABLED); aggr_unselected(p); aggr_record_default(sc, p); timeout_del(&p->p_ptm_tx); } } static void aggr_map(struct aggr_softc *sc) { struct ifnet *ifp = &sc->sc_if; struct aggr_map *map = NULL; struct aggr_port *p; unsigned int gen; unsigned int i; int link_state = LINK_STATE_DOWN; p = TAILQ_FIRST(&sc->sc_distributing); if (p != NULL) { gen = sc->sc_map_gen++; map = &sc->sc_maps[gen % nitems(sc->sc_maps)]; for (i = 0; i < nitems(map->m_ifp0s); i++) { map->m_ifp0s[i] = p->p_ifp0; p = TAILQ_NEXT(p, p_entry_distributing); if (p == NULL) p = TAILQ_FIRST(&sc->sc_distributing); } link_state = LINK_STATE_FULL_DUPLEX; } SMR_PTR_SET_LOCKED(&sc->sc_map, map); smr_barrier(); if (ifp->if_link_state != link_state) { ifp->if_link_state = link_state; if_link_state_change(ifp); } } static void aggr_current_while_timer(void *arg) { struct aggr_port *p = arg; struct aggr_softc *sc = p->p_aggr; aggr_rxm(sc, p, LACP_RXM_E_TIMER_EXPIRED); } static void aggr_wait_while_timer(void *arg) { struct aggr_port *p = arg; struct aggr_softc *sc = p->p_aggr; aggr_selection_logic(sc, p); } static void aggr_start_current_while_timer(struct aggr_port *p, unsigned int t) { timeout_add_sec(&p->p_current_while_timer, aggr_periodic_times[t] * LACP_TIMEOUT_FACTOR); } static void aggr_input_lacpdu(struct aggr_port *p, struct mbuf *m) { struct aggr_softc *sc = p->p_aggr; struct lacp_du *lacpdu; if (m->m_len < sizeof(*lacpdu)) { m = m_pullup(m, sizeof(*lacpdu)); if (m == NULL) return; } /* * In the process of executing the recordPDU function, a Receive * machine compliant to this standard shall not validate the * Version Number, TLV_type, or Reserved fields in received * LACPDUs. The same actions are taken regardless of the values * received in these fields. A Receive machine may validate * the Actor_Information_Length, Partner_Information_Length, * Collector_Information_Length, or Terminator_Length fields. */ lacpdu = mtod(m, struct lacp_du *); aggr_rxm_lacpdu(sc, p, lacpdu); m_freem(m); } static void aggr_update_selected(struct aggr_softc *sc, struct aggr_port *p, const struct lacp_du *lacpdu) { const struct lacp_port_info *rpi = &lacpdu->lacp_actor_info; const struct lacp_port_info *lpi = &p->p_partner; if ((rpi->lacp_portid.lacp_portid_number == lpi->lacp_portid.lacp_portid_number) && (rpi->lacp_portid.lacp_portid_priority == lpi->lacp_portid.lacp_portid_priority) && ETHER_IS_EQ(rpi->lacp_sysid.lacp_sysid_mac, lpi->lacp_sysid.lacp_sysid_mac) && (rpi->lacp_sysid.lacp_sysid_priority == lpi->lacp_sysid.lacp_sysid_priority) && (rpi->lacp_key == lpi->lacp_key) && (ISSET(rpi->lacp_state, LACP_STATE_AGGREGATION) == ISSET(lpi->lacp_state, LACP_STATE_AGGREGATION))) return; aggr_unselected(p); } static void aggr_record_default(struct aggr_softc *sc, struct aggr_port *p) { struct lacp_port_info *pi = &p->p_partner; pi->lacp_sysid.lacp_sysid_priority = htons(0); memset(pi->lacp_sysid.lacp_sysid_mac, 0, sizeof(pi->lacp_sysid.lacp_sysid_mac)); pi->lacp_key = htons(0); pi->lacp_portid.lacp_portid_priority = htons(0); pi->lacp_portid.lacp_portid_number = htons(0); SET(p->p_actor_state, LACP_STATE_DEFAULTED); pi->lacp_state = LACP_STATE_AGGREGATION | LACP_STATE_SYNC; if (sc->sc_lacp_timeout == AGGR_LACP_TIMEOUT_FAST) SET(pi->lacp_state, LACP_STATE_TIMEOUT); if (sc->sc_lacp_mode == AGGR_LACP_MODE_ACTIVE) SET(pi->lacp_state, LACP_STATE_ACTIVITY); /* notify Mux */ aggr_mux(sc, p, LACP_MUX_E_NOT_COLLECTING); aggr_mux(sc, p, LACP_MUX_E_SYNC); } static void aggr_update_default_selected(struct aggr_softc *sc, struct aggr_port *p) { const struct lacp_port_info *pi = &p->p_partner; if ((pi->lacp_portid.lacp_portid_number == htons(0)) && (pi->lacp_portid.lacp_portid_priority == htons(0)) && ETHER_IS_ANYADDR(pi->lacp_sysid.lacp_sysid_mac) && (pi->lacp_sysid.lacp_sysid_priority == htons(0)) && (pi->lacp_key == htons(0)) && ISSET(pi->lacp_state, LACP_STATE_AGGREGATION)) return; aggr_unselected(p); aggr_selection_logic(sc, p); /* restart */ } static int aggr_update_ntt(struct aggr_port *p, const struct lacp_du *lacpdu) { struct aggr_softc *sc = p->p_aggr; struct arpcom *ac = &sc->sc_ac; struct ifnet *ifp = &ac->ac_if; struct ifnet *ifp0 = p->p_ifp0; const struct lacp_port_info *pi = &lacpdu->lacp_partner_info; uint8_t bits = LACP_STATE_ACTIVITY | LACP_STATE_TIMEOUT | LACP_STATE_SYNC | LACP_STATE_AGGREGATION; uint8_t state = p->p_actor_state; int sync = 0; if (pi->lacp_portid.lacp_portid_number != htons(ifp0->if_index)) goto ntt; if (pi->lacp_portid.lacp_portid_priority != htons(sc->sc_lacp_port_prio)) goto ntt; if (!ETHER_IS_EQ(pi->lacp_sysid.lacp_sysid_mac, ac->ac_enaddr)) goto ntt; if (pi->lacp_sysid.lacp_sysid_priority != htons(sc->sc_lacp_prio)) goto ntt; if (pi->lacp_key != htons(ifp->if_index)) goto ntt; if (ISSET(pi->lacp_state, LACP_STATE_SYNC) != ISSET(state, LACP_STATE_SYNC)) goto ntt; sync = 1; if (sc->sc_lacp_timeout == AGGR_LACP_TIMEOUT_FAST) SET(state, LACP_STATE_TIMEOUT); if (sc->sc_lacp_mode == AGGR_LACP_MODE_ACTIVE) SET(state, LACP_STATE_ACTIVITY); if (ISSET(pi->lacp_state, bits) != ISSET(state, bits)) goto ntt; return (1); ntt: aggr_ntt(p); return (sync); } static void aggr_recordpdu(struct aggr_port *p, const struct lacp_du *lacpdu, int sync) { struct aggr_softc *sc = p->p_aggr; const struct lacp_port_info *rpi = &lacpdu->lacp_actor_info; struct lacp_port_info *lpi = &p->p_partner; int active = ISSET(rpi->lacp_state, LACP_STATE_ACTIVITY) || (ISSET(p->p_actor_state, LACP_STATE_ACTIVITY) && ISSET(lacpdu->lacp_partner_info.lacp_state, LACP_STATE_ACTIVITY)); lpi->lacp_portid.lacp_portid_number = rpi->lacp_portid.lacp_portid_number; lpi->lacp_portid.lacp_portid_priority = rpi->lacp_portid.lacp_portid_priority; memcpy(lpi->lacp_sysid.lacp_sysid_mac, rpi->lacp_sysid.lacp_sysid_mac, sizeof(lpi->lacp_sysid.lacp_sysid_mac)); lpi->lacp_sysid.lacp_sysid_priority = rpi->lacp_sysid.lacp_sysid_priority; lpi->lacp_key = rpi->lacp_key; lpi->lacp_state = rpi->lacp_state & ~LACP_STATE_SYNC; CLR(p->p_actor_state, LACP_STATE_DEFAULTED); if (active && ISSET(rpi->lacp_state, LACP_STATE_SYNC) && sync) { SET(p->p_partner_state, LACP_STATE_SYNC); aggr_mux(sc, p, LACP_MUX_E_SYNC); } else { CLR(p->p_partner_state, LACP_STATE_SYNC); aggr_mux(sc, p, LACP_MUX_E_NOT_SYNC); } } static void aggr_marker_response(struct aggr_port *p, struct mbuf *m) { struct aggr_softc *sc = p->p_aggr; struct arpcom *ac = &sc->sc_ac; struct ifnet *ifp0 = p->p_ifp0; struct marker_pdu *mpdu; struct ether_header *eh; mpdu = mtod(m, struct marker_pdu *); mpdu->marker_info_tlv.lacp_tlv_type = MARKER_T_RESPONSE; m = m_prepend(m, sizeof(*eh), M_DONTWAIT); if (m == NULL) return; eh = mtod(m, struct ether_header *); memcpy(eh->ether_dhost, lacp_address_slow, sizeof(eh->ether_dhost)); memcpy(eh->ether_shost, ac->ac_enaddr, sizeof(eh->ether_shost)); eh->ether_type = htons(ETHERTYPE_SLOW); (void)if_enqueue(ifp0, m); } static void aggr_input_marker(struct aggr_port *p, struct mbuf *m) { struct marker_pdu *mpdu; if (m->m_len < sizeof(*mpdu)) { m = m_pullup(m, sizeof(*mpdu)); if (m == NULL) return; } mpdu = mtod(m, struct marker_pdu *); switch (mpdu->marker_info_tlv.lacp_tlv_type) { case MARKER_T_INFORMATION: aggr_marker_response(p, m); break; default: m_freem(m); break; } } static void aggr_rx(void *arg) { struct aggr_port *p = arg; struct mbuf_list ml; struct mbuf *m; mq_delist(&p->p_rxm_mq, &ml); while ((m = ml_dequeue(&ml)) != NULL) { struct ether_slowproto_hdr *sph; /* aggr_input has checked eh already */ m_adj(m, sizeof(struct ether_header)); sph = mtod(m, struct ether_slowproto_hdr *); switch (sph->sph_subtype) { case SLOWPROTOCOLS_SUBTYPE_LACP: aggr_input_lacpdu(p, m); break; case SLOWPROTOCOLS_SUBTYPE_LACP_MARKER: aggr_input_marker(p, m); break; default: panic("unexpected slow protocol subtype"); /* NOTREACHED */ } } } static void aggr_set_selected(struct aggr_port *p, enum aggr_port_selected s, enum lacp_mux_event ev) { struct aggr_softc *sc = p->p_aggr; if (p->p_selected != s) { DPRINTF(sc, "%s %s: Selected %s -> %s\n", sc->sc_if.if_xname, p->p_ifp0->if_xname, aggr_port_selected_names[p->p_selected], aggr_port_selected_names[s]); p->p_selected = s; } aggr_mux(sc, p, ev); } static void aggr_unselected(struct aggr_port *p) { aggr_set_selected(p, AGGR_PORT_UNSELECTED, LACP_MUX_E_UNSELECTED); } static inline void aggr_selected(struct aggr_port *p) { aggr_set_selected(p, AGGR_PORT_SELECTED, LACP_MUX_E_SELECTED); } #ifdef notyet static inline void aggr_standby(struct aggr_port *p) { aggr_set_selected(p, AGGR_PORT_STANDBY, LACP_MUX_E_STANDBY); } #endif static void aggr_selection_logic(struct aggr_softc *sc, struct aggr_port *p) { const struct lacp_port_info *pi; struct arpcom *ac = &sc->sc_ac; struct ifnet *ifp = &ac->ac_if; const uint8_t *mac; if (p->p_rxm_state != LACP_RXM_S_CURRENT) { DPRINTF(sc, "%s %s: selection logic: unselected (rxm !%s)\n", ifp->if_xname, p->p_ifp0->if_xname, lacp_rxm_state_names[LACP_RXM_S_CURRENT]); goto unselected; } pi = &p->p_partner; if (pi->lacp_key == htons(0)) { DPRINTF(sc, "%s %s: selection logic: unselected " "(partner key == 0)\n", ifp->if_xname, p->p_ifp0->if_xname); goto unselected; } /* * aggr(4) does not support individual interfaces */ if (!ISSET(pi->lacp_state, LACP_STATE_AGGREGATION)) { DPRINTF(sc, "%s %s: selection logic: unselected " "(partner state is Individual)\n", ifp->if_xname, p->p_ifp0->if_xname); goto unselected; } /* * Any pair of Aggregation Ports that are members of the same * LAG, but are connected together by the same link, shall not * select the same Aggregator */ mac = pi->lacp_sysid.lacp_sysid_mac; if (ETHER_IS_EQ(mac, ac->ac_enaddr) && pi->lacp_key == htons(ifp->if_index)) { DPRINTF(sc, "%s %s: selection logic: unselected " "(partner sysid !eq)\n", ifp->if_xname, p->p_ifp0->if_xname); goto unselected; } if (!TAILQ_EMPTY(&sc->sc_muxen)) { /* an aggregation has already been selected */ if (!ETHER_IS_EQ(mac, sc->sc_partner_system.lacp_sysid_mac) || sc->sc_partner_key != pi->lacp_key) { DPRINTF(sc, "%s %s: selection logic: unselected " "(partner sysid != selection)\n", ifp->if_xname, p->p_ifp0->if_xname); goto unselected; } } aggr_selected(p); return; unselected: aggr_unselected(p); } static void aggr_mux(struct aggr_softc *sc, struct aggr_port *p, enum lacp_mux_event ev) { int ntt = 0; /* * the mux can move through multiple states based on a * single event, so loop until the event is completely consumed. * debounce NTT = TRUE through the multiple state transitions. */ while (aggr_mux_ev(sc, p, ev, &ntt) != 0) ; if (ntt) aggr_ntt(p); } #ifdef notyet static int aggr_ready_n(struct aggr_port *p) { return (p->p_mux_state == LACP_MUX_S_WAITING && !timeout_pending(&p->p_wait_while_timer)); } #endif static inline int aggr_ready(struct aggr_softc *sc) { return (1); } static void aggr_disable_distributing(struct aggr_softc *sc, struct aggr_port *p) { if (!p->p_distributing) return; sc->sc_ndistributing--; TAILQ_REMOVE(&sc->sc_distributing, p, p_entry_distributing); p->p_distributing = 0; aggr_map(sc); DPRINTF(sc, "%s %s: distributing disabled\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static void aggr_enable_distributing(struct aggr_softc *sc, struct aggr_port *p) { if (p->p_distributing) return; /* check the LAG ID? */ p->p_distributing = 1; TAILQ_INSERT_TAIL(&sc->sc_distributing, p, p_entry_distributing); sc->sc_ndistributing++; aggr_map(sc); DPRINTF(sc, "%s %s: distributing enabled\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static void aggr_disable_collecting(struct aggr_softc *sc, struct aggr_port *p) { if (!p->p_collecting) return; p->p_collecting = 0; DPRINTF(sc, "%s %s: collecting disabled\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static void aggr_enable_collecting(struct aggr_softc *sc, struct aggr_port *p) { if (p->p_collecting) return; p->p_collecting = 1; DPRINTF(sc, "%s %s: collecting enabled\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static void aggr_attach_mux(struct aggr_softc *sc, struct aggr_port *p) { const struct lacp_port_info *pi = &p->p_partner; if (p->p_muxed) return; p->p_muxed = 1; if (TAILQ_EMPTY(&sc->sc_muxen)) { KASSERT(sc->sc_partner_key == htons(0)); sc->sc_partner_system = pi->lacp_sysid; sc->sc_partner_key = pi->lacp_key; } TAILQ_INSERT_TAIL(&sc->sc_muxen, p, p_entry_muxen); DPRINTF(sc, "%s %s: mux attached\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static void aggr_detach_mux(struct aggr_softc *sc, struct aggr_port *p) { if (!p->p_muxed) return; p->p_muxed = 0; TAILQ_REMOVE(&sc->sc_muxen, p, p_entry_muxen); if (TAILQ_EMPTY(&sc->sc_muxen)) { memset(&sc->sc_partner_system.lacp_sysid_mac, 0, sizeof(sc->sc_partner_system.lacp_sysid_mac)); sc->sc_partner_system.lacp_sysid_priority = htons(0); sc->sc_partner_key = htons(0); } DPRINTF(sc, "%s %s: mux detached\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); } static int aggr_mux_ev(struct aggr_softc *sc, struct aggr_port *p, enum lacp_mux_event ev, int *ntt) { enum lacp_mux_state nstate = LACP_MUX_S_DETACHED; switch (p->p_mux_state) { case LACP_MUX_S_BEGIN: KASSERT(ev == LACP_MUX_E_BEGIN); nstate = LACP_MUX_S_DETACHED; break; case LACP_MUX_S_DETACHED: switch (ev) { case LACP_MUX_E_SELECTED: case LACP_MUX_E_STANDBY: nstate = LACP_MUX_S_WAITING; break; default: return (0); } break; case LACP_MUX_S_WAITING: switch (ev) { case LACP_MUX_E_UNSELECTED: nstate = LACP_MUX_S_DETACHED; break; case LACP_MUX_E_SELECTED: case LACP_MUX_E_READY: if (aggr_ready(sc) && p->p_selected == AGGR_PORT_SELECTED) { nstate = LACP_MUX_S_ATTACHED; break; } /* FALLTHROUGH */ default: return (0); } break; case LACP_MUX_S_ATTACHED: switch (ev) { case LACP_MUX_E_UNSELECTED: case LACP_MUX_E_STANDBY: nstate = LACP_MUX_S_DETACHED; break; case LACP_MUX_E_SELECTED: case LACP_MUX_E_SYNC: if (p->p_selected == AGGR_PORT_SELECTED && ISSET(p->p_partner_state, LACP_STATE_SYNC)) { nstate = LACP_MUX_S_COLLECTING; break; } /* FALLTHROUGH */ default: return (0); } break; case LACP_MUX_S_COLLECTING: switch (ev) { case LACP_MUX_E_UNSELECTED: case LACP_MUX_E_STANDBY: case LACP_MUX_E_NOT_SYNC: nstate = LACP_MUX_S_ATTACHED; break; case LACP_MUX_E_SELECTED: case LACP_MUX_E_SYNC: case LACP_MUX_E_COLLECTING: if (p->p_selected == AGGR_PORT_SELECTED && ISSET(p->p_partner_state, LACP_STATE_SYNC) && ISSET(p->p_partner_state, LACP_STATE_COLLECTING)) { nstate = LACP_MUX_S_DISTRIBUTING; break; } /* FALLTHROUGH */ default: return (0); } break; case LACP_MUX_S_DISTRIBUTING: switch (ev) { case LACP_MUX_E_UNSELECTED: case LACP_MUX_E_STANDBY: case LACP_MUX_E_NOT_SYNC: case LACP_MUX_E_NOT_COLLECTING: nstate = LACP_MUX_S_COLLECTING; break; default: return (0); } break; } DPRINTF(sc, "%s %s mux: %s (%s) -> %s\n", sc->sc_if.if_xname, p->p_ifp0->if_xname, lacp_mux_state_names[p->p_mux_state], lacp_mux_event_names[ev], lacp_mux_state_names[nstate]); /* act on the new state */ switch (nstate) { case LACP_MUX_S_BEGIN: panic("unexpected mux nstate BEGIN"); /* NOTREACHED */ case LACP_MUX_S_DETACHED: /* * Detach_Mux_From_Aggregator(); * Actor.Sync = FALSE; * Disable_Distributing(); * Actor.Distributing = FALSE; * Actor.Collecting = FALSE; * Disable_Collecting(); * NTT = TRUE; */ aggr_detach_mux(sc, p); CLR(p->p_actor_state, LACP_STATE_SYNC); aggr_disable_distributing(sc, p); CLR(p->p_actor_state, LACP_STATE_DISTRIBUTING); CLR(p->p_actor_state, LACP_STATE_COLLECTING); aggr_disable_collecting(sc, p); *ntt = 1; break; case LACP_MUX_S_WAITING: /* * Start wait_while_timer */ timeout_add_sec(&p->p_wait_while_timer, LACP_AGGREGATION_WAIT_TIME); break; case LACP_MUX_S_ATTACHED: /* * Attach_Mux_To_Aggregator(); * Actor.Sync = TRUE; * Actor.Collecting = FALSE; * Disable_Collecting(); * NTT = TRUE; */ aggr_attach_mux(sc, p); SET(p->p_actor_state, LACP_STATE_SYNC); CLR(p->p_actor_state, LACP_STATE_COLLECTING); aggr_disable_collecting(sc, p); *ntt = 1; break; case LACP_MUX_S_COLLECTING: /* * Enable_Collecting(); * Actor.Collecting = TRUE; * Disable_Distributing(); * Actor.Distributing = FALSE; * NTT = TRUE; */ aggr_enable_collecting(sc, p); SET(p->p_actor_state, LACP_STATE_COLLECTING); aggr_disable_distributing(sc, p); CLR(p->p_actor_state, LACP_STATE_DISTRIBUTING); *ntt = 1; break; case LACP_MUX_S_DISTRIBUTING: /* * Actor.Distributing = TRUE; * Enable_Distributing(); */ SET(p->p_actor_state, LACP_STATE_DISTRIBUTING); aggr_enable_distributing(sc, p); break; } p->p_mux_state = nstate; return (1); } static void aggr_rxm_ev(struct aggr_softc *sc, struct aggr_port *p, enum lacp_rxm_event ev, const struct lacp_du *lacpdu) { unsigned int port_disabled = 0; enum lacp_rxm_state nstate = LACP_RXM_S_BEGIN; KASSERT((ev == LACP_RXM_E_LACPDU) == (lacpdu != NULL)); /* global transitions */ switch (ev) { case LACP_RXM_E_NOT_PORT_ENABLED: port_disabled = !aggr_port_moved(sc, p); break; case LACP_RXM_E_NOT_PORT_MOVED: port_disabled = !aggr_port_enabled(p); break; default: break; } if (port_disabled) nstate = LACP_RXM_S_PORT_DISABLED; else switch (p->p_rxm_state) { /* local state transitions */ case LACP_RXM_S_BEGIN: KASSERT(ev == LACP_RXM_E_BEGIN); nstate = LACP_RXM_S_INITIALIZE; break; case LACP_RXM_S_INITIALIZE: /* this should only be handled via UCT in nstate handling */ panic("unexpected rxm state INITIALIZE"); case LACP_RXM_S_PORT_DISABLED: switch (ev) { case LACP_RXM_E_PORT_MOVED: nstate = LACP_RXM_S_INITIALIZE; break; case LACP_RXM_E_PORT_ENABLED: nstate = aggr_lacp_enabled(sc) ? LACP_RXM_S_EXPIRED : LACP_RXM_S_LACP_DISABLED; break; case LACP_RXM_E_LACP_ENABLED: if (!aggr_port_enabled(p)) return; nstate = LACP_RXM_S_EXPIRED; break; case LACP_RXM_E_NOT_LACP_ENABLED: if (!aggr_port_enabled(p)) return; nstate = LACP_RXM_S_LACP_DISABLED; break; default: return; } break; case LACP_RXM_S_EXPIRED: switch (ev) { case LACP_RXM_E_LACPDU: nstate = LACP_RXM_S_CURRENT; break; case LACP_RXM_E_TIMER_EXPIRED: nstate = LACP_RXM_S_DEFAULTED; break; default: return; } break; case LACP_RXM_S_LACP_DISABLED: switch (ev) { case LACP_RXM_E_LACP_ENABLED: nstate = LACP_RXM_S_PORT_DISABLED; break; default: return; } break; case LACP_RXM_S_DEFAULTED: switch (ev) { case LACP_RXM_E_LACPDU: nstate = LACP_RXM_S_CURRENT; break; default: return; } break; case LACP_RXM_S_CURRENT: switch (ev) { case LACP_RXM_E_TIMER_EXPIRED: nstate = LACP_RXM_S_EXPIRED; break; case LACP_RXM_E_LACPDU: nstate = LACP_RXM_S_CURRENT; break; default: return; } break; } uct: if (p->p_rxm_state != nstate) { DPRINTF(sc, "%s %s rxm: %s (%s) -> %s\n", sc->sc_if.if_xname, p->p_ifp0->if_xname, lacp_rxm_state_names[p->p_rxm_state], lacp_rxm_event_names[ev], lacp_rxm_state_names[nstate]); } /* record the new state */ p->p_rxm_state = nstate; /* act on the new state */ switch (nstate) { case LACP_RXM_S_BEGIN: panic("unexpected rxm nstate BEGIN"); /* NOTREACHED */ case LACP_RXM_S_INITIALIZE: /* * Selected = UNSELECTED; * recordDefault(); * Actor_Oper_Port_State.Expired = FALSE; * port_moved = FALSE; */ aggr_unselected(p); aggr_record_default(sc, p); CLR(p->p_actor_state, LACP_STATE_EXPIRED); ev = LACP_RXM_E_UCT; nstate = LACP_RXM_S_PORT_DISABLED; goto uct; /* NOTREACHED */ case LACP_RXM_S_PORT_DISABLED: /* * Partner_Oper_Port_State.Synchronization = FALSE; */ CLR(p->p_partner_state, LACP_STATE_SYNC); aggr_mux(sc, p, LACP_MUX_E_NOT_SYNC); break; case LACP_RXM_S_EXPIRED: /* * Partner_Oper_Port_State.Synchronization = FALSE; * Partner_Oper_Port_State.LACP_Timeout = Short Timeout; * start current_while_timer(Short Timeout); * Actor_Oper_Port_State.Expired = TRUE; */ CLR(p->p_partner_state, LACP_STATE_SYNC); aggr_mux(sc, p, LACP_MUX_E_NOT_SYNC); aggr_set_partner_timeout(p, AGGR_LACP_TIMEOUT_FAST); aggr_start_current_while_timer(p, AGGR_LACP_TIMEOUT_FAST); SET(p->p_actor_state, LACP_STATE_EXPIRED); break; case LACP_RXM_S_LACP_DISABLED: /* * Selected = UNSELECTED; * recordDefault(); * Partner_Oper_Port_State.Aggregation = FALSE; * Actor_Oper_Port_State.Expired = FALSE; */ aggr_unselected(p); aggr_record_default(sc, p); CLR(p->p_partner_state, LACP_STATE_AGGREGATION); CLR(p->p_actor_state, LACP_STATE_EXPIRED); break; case LACP_RXM_S_DEFAULTED: /* * update_Default_Selected(); * recordDefault(); * Actor_Oper_Port_State.Expired = FALSE; */ aggr_update_default_selected(sc, p); aggr_record_default(sc, p); CLR(p->p_actor_state, LACP_STATE_EXPIRED); break; case LACP_RXM_S_CURRENT: { /* * update_Selected(); * update_NTT(); * if (Actor_System_LACP_Version >=2 ) recordVersionNumber(); * recordPDU(); * start current_while_timer( * Actor_Oper_Port_State.LACP_Timeout); * Actor_Oper_Port_State.Expired = FALSE; */ int sync; aggr_update_selected(sc, p, lacpdu); sync = aggr_update_ntt(p, lacpdu); /* don't support v2 yet */ aggr_recordpdu(p, lacpdu, sync); aggr_start_current_while_timer(p, sc->sc_lacp_timeout); CLR(p->p_actor_state, LACP_STATE_EXPIRED); if (p->p_selected == AGGR_PORT_UNSELECTED) aggr_selection_logic(sc, p); /* restart */ } break; } } static int aggr_up(struct aggr_softc *sc) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; NET_ASSERT_LOCKED(); KASSERT(!ISSET(ifp->if_flags, IFF_RUNNING)); SET(ifp->if_flags, IFF_RUNNING); /* LACP_Enabled = TRUE */ TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { aggr_rxm(sc, p, LACP_RXM_E_LACP_ENABLED); aggr_p_linkch(p); } /* start the Periodic Transmission machine */ if (sc->sc_lacp_mode == AGGR_LACP_MODE_ACTIVE) { TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (!aggr_port_enabled(p)) continue; timeout_add_sec(&p->p_ptm_tx, aggr_periodic_times[sc->sc_lacp_timeout]); } } return (ENETRESET); } static int aggr_iff(struct aggr_softc *sc) { struct ifnet *ifp = &sc->sc_if; unsigned int promisc = ISSET(ifp->if_flags, IFF_PROMISC); NET_ASSERT_LOCKED(); if (promisc != sc->sc_promisc) { struct aggr_port *p; rw_enter_read(&sc->sc_lock); TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { struct ifnet *ifp0 = p->p_ifp0; if (ifpromisc(ifp0, promisc) != 0) { log(LOG_WARNING, "%s iff %s: " "unable to turn promisc %s\n", ifp->if_xname, ifp0->if_xname, promisc ? "on" : "off"); } } rw_exit_read(&sc->sc_lock); sc->sc_promisc = promisc; } return (0); } static int aggr_down(struct aggr_softc *sc) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; NET_ASSERT_LOCKED(); CLR(ifp->if_flags, IFF_RUNNING); /* LACP_Enabled = FALSE */ TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { aggr_rxm(sc, p, LACP_RXM_E_NOT_LACP_ENABLED); /* stop the Periodic Transmission machine */ timeout_del(&p->p_ptm_tx); /* stop the Mux machine */ aggr_mux(sc, p, LACP_MUX_E_UNSELECTED); /* stop the Transmit machine */ timeout_del(&p->p_txm_ntt); } KASSERT(TAILQ_EMPTY(&sc->sc_distributing)); KASSERT(sc->sc_ndistributing == 0); KASSERT(SMR_PTR_GET_LOCKED(&sc->sc_map) == NULL); return (ENETRESET); } static int aggr_set_lladdr(struct aggr_softc *sc, const struct ifreq *ifr) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; const uint8_t *lladdr = ifr->ifr_addr.sa_data; rw_enter_read(&sc->sc_lock); TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (aggr_p_setlladdr(p, lladdr) != 0) { struct ifnet *ifp0 = p->p_ifp0; log(LOG_WARNING, "%s setlladdr %s: " "unable to set lladdr\n", ifp->if_xname, ifp0->if_xname); } } rw_exit_read(&sc->sc_lock); return (0); } static int aggr_set_mtu(struct aggr_softc *sc, uint32_t mtu) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; if (mtu < ETHERMIN || mtu > ifp->if_hardmtu) return (EINVAL); ifp->if_mtu = mtu; TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (aggr_p_set_mtu(p, mtu) != 0) { struct ifnet *ifp0 = p->p_ifp0; log(LOG_WARNING, "%s %s: unable to set mtu %u\n", ifp->if_xname, ifp0->if_xname, mtu); } } return (0); } static int aggr_group(struct aggr_softc *sc, struct aggr_port *p, u_long cmd) { struct ifnet *ifp0 = p->p_ifp0; struct ifreq ifr; struct sockaddr *sa; memset(&ifr, 0, sizeof(ifr)); /* make it convincing */ CTASSERT(sizeof(ifr.ifr_name) == sizeof(ifp0->if_xname)); memcpy(ifr.ifr_name, ifp0->if_xname, sizeof(ifr.ifr_name)); sa = &ifr.ifr_addr; CTASSERT(sizeof(sa->sa_data) >= sizeof(lacp_address_slow)); sa->sa_family = AF_UNSPEC; memcpy(sa->sa_data, lacp_address_slow, sizeof(lacp_address_slow)); return ((*p->p_ioctl)(ifp0, cmd, (caddr_t)&ifr)); } static int aggr_multi(struct aggr_softc *sc, struct aggr_port *p, const struct aggr_multiaddr *ma, u_long cmd) { struct ifnet *ifp0 = p->p_ifp0; struct { char if_name[IFNAMSIZ]; struct sockaddr_storage if_addr; } ifr; memset(&ifr, 0, sizeof(ifr)); /* make it convincing */ CTASSERT(sizeof(ifr.if_name) == sizeof(ifp0->if_xname)); memcpy(ifr.if_name, ifp0->if_xname, sizeof(ifr.if_name)); ifr.if_addr = ma->m_addr; return ((*p->p_ioctl)(ifp0, cmd, (caddr_t)&ifr)); } static void aggr_media_status(struct ifnet *ifp, struct ifmediareq *imr) { struct aggr_softc *sc = ifp->if_softc; imr->ifm_status = IFM_AVALID; imr->ifm_active = IFM_ETHER | IFM_AUTO; smr_read_enter(); /* there's no reason to block... */ if (SMR_PTR_GET(&sc->sc_map) != NULL) imr->ifm_status |= IFM_ACTIVE; smr_read_leave(); } static int aggr_media_change(struct ifnet *ifp) { return (EOPNOTSUPP); } static uint32_t aggr_hardmtu(struct aggr_softc *sc) { struct aggr_port *p; uint32_t hardmtu = ETHER_MAX_HARDMTU_LEN; rw_enter_read(&sc->sc_lock); TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { struct ifnet *ifp0 = p->p_ifp0; if (ifp0->if_hardmtu < hardmtu) hardmtu = ifp0->if_hardmtu; } rw_exit_read(&sc->sc_lock); return (hardmtu); } static void aggr_ptm_tx(void *arg) { struct aggr_port *p = arg; unsigned int timeout; aggr_ntt(p); timeout = ISSET(p->p_partner_state, LACP_STATE_TIMEOUT) ? AGGR_LACP_TIMEOUT_FAST : AGGR_LACP_TIMEOUT_SLOW; timeout_add_sec(&p->p_ptm_tx, aggr_periodic_times[timeout]); } static inline void aggr_lacp_tlv_set(struct lacp_tlv_hdr *tlv, uint8_t type, uint8_t len) { tlv->lacp_tlv_type = type; tlv->lacp_tlv_length = sizeof(*tlv) + len; } static void aggr_ntt_transmit(struct aggr_port *p) { struct aggr_softc *sc = p->p_aggr; struct arpcom *ac = &sc->sc_ac; struct ifnet *ifp = &sc->sc_if; struct ifnet *ifp0 = p->p_ifp0; struct mbuf *m; struct lacp_du *lacpdu; struct lacp_port_info *pi; struct lacp_collector_info *ci; struct ether_header *eh; int linkhdr = max_linkhdr + ETHER_ALIGN; int len = linkhdr + sizeof(*eh) + sizeof(*lacpdu); m = m_gethdr(M_DONTWAIT, MT_DATA); if (m == NULL) return; if (len > MHLEN) { MCLGETI(m, M_DONTWAIT, NULL, len); if (!ISSET(m->m_flags, M_EXT)) { m_freem(m); return; } } m->m_pkthdr.pf.prio = sc->sc_if.if_llprio; m->m_pkthdr.len = m->m_len = len; memset(m->m_data, 0, m->m_len); m_adj(m, linkhdr); eh = mtod(m, struct ether_header *); CTASSERT(sizeof(eh->ether_dhost) == sizeof(lacp_address_slow)); CTASSERT(sizeof(eh->ether_shost) == sizeof(ac->ac_enaddr)); memcpy(eh->ether_dhost, lacp_address_slow, sizeof(eh->ether_dhost)); memcpy(eh->ether_shost, ac->ac_enaddr, sizeof(eh->ether_shost)); eh->ether_type = htons(ETHERTYPE_SLOW); lacpdu = (struct lacp_du *)(eh + 1); lacpdu->lacp_du_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP; lacpdu->lacp_du_sph.sph_version = LACP_VERSION; pi = &lacpdu->lacp_actor_info; aggr_lacp_tlv_set(&lacpdu->lacp_actor_info_tlv, LACP_T_ACTOR, sizeof(*pi)); pi->lacp_sysid.lacp_sysid_priority = htons(sc->sc_lacp_prio); CTASSERT(sizeof(pi->lacp_sysid.lacp_sysid_mac) == sizeof(ac->ac_enaddr)); memcpy(pi->lacp_sysid.lacp_sysid_mac, ac->ac_enaddr, sizeof(pi->lacp_sysid.lacp_sysid_mac)); pi->lacp_key = htons(ifp->if_index); pi->lacp_portid.lacp_portid_priority = htons(sc->sc_lacp_port_prio); pi->lacp_portid.lacp_portid_number = htons(ifp0->if_index); pi->lacp_state = p->p_actor_state; if (sc->sc_lacp_mode) SET(pi->lacp_state, LACP_STATE_ACTIVITY); if (sc->sc_lacp_timeout) SET(pi->lacp_state, LACP_STATE_TIMEOUT); pi = &lacpdu->lacp_partner_info; aggr_lacp_tlv_set(&lacpdu->lacp_partner_info_tlv, LACP_T_PARTNER, sizeof(*pi)); *pi = p->p_partner; ci = &lacpdu->lacp_collector_info; aggr_lacp_tlv_set(&lacpdu->lacp_collector_info_tlv, LACP_T_COLLECTOR, sizeof(*ci)); ci->lacp_maxdelay = htons(0); lacpdu->lacp_terminator.lacp_tlv_type = LACP_T_TERMINATOR; lacpdu->lacp_terminator.lacp_tlv_length = 0; (void)if_enqueue(ifp0, m); } static void aggr_ntt(struct aggr_port *p) { if (!timeout_pending(&p->p_txm_ntt)) timeout_add(&p->p_txm_ntt, 0); } static void aggr_transmit_machine(void *arg) { struct aggr_port *p = arg; struct aggr_softc *sc = p->p_aggr; unsigned int slot; int *log; int period = hz * LACP_FAST_PERIODIC_TIME; int diff; if (!aggr_lacp_enabled(sc) || !aggr_port_enabled(p)) return; slot = p->p_txm_slot; log = &p->p_txm_log[slot % nitems(p->p_txm_log)]; diff = ticks - *log; if (diff < period) { timeout_add(&p->p_txm_ntt, period - diff); return; } *log = ticks; p->p_txm_slot = ++slot; #if 0 DPRINTF(sc, "%s %s ntt\n", sc->sc_if.if_xname, p->p_ifp0->if_xname); #endif aggr_ntt_transmit(p); } static void aggr_set_lacp_mode(struct aggr_softc *sc, int mode) { sc->sc_lacp_mode = mode; if (mode == AGGR_LACP_MODE_PASSIVE) { struct aggr_port *p; TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (!ISSET(p->p_partner_state, LACP_STATE_ACTIVITY)) timeout_del(&p->p_ptm_tx); } } } static void aggr_set_partner_timeout(struct aggr_port *p, int timeout) { uint8_t ostate = ISSET(p->p_partner_state, LACP_STATE_TIMEOUT); uint8_t nstate = (timeout == AGGR_LACP_TIMEOUT_FAST) ? LACP_STATE_TIMEOUT : 0; if (ostate == nstate) return; if (timeout == AGGR_LACP_TIMEOUT_FAST) { SET(p->p_partner_state, LACP_STATE_TIMEOUT); timeout_add_sec(&p->p_ptm_tx, aggr_periodic_times[AGGR_LACP_TIMEOUT_FAST]); } else CLR(p->p_partner_state, LACP_STATE_TIMEOUT); } static void aggr_set_lacp_timeout(struct aggr_softc *sc, int timeout) { struct aggr_port *p; sc->sc_lacp_timeout = timeout; TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { if (!ISSET(p->p_actor_state, LACP_STATE_DEFAULTED)) continue; aggr_set_partner_timeout(p, timeout); } } static int aggr_multi_eq(const struct aggr_multiaddr *ma, const uint8_t *addrlo, const uint8_t *addrhi) { return (ETHER_IS_EQ(ma->m_addrlo, addrlo) && ETHER_IS_EQ(ma->m_addrhi, addrhi)); } static int aggr_multi_add(struct aggr_softc *sc, struct ifreq *ifr) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; struct aggr_multiaddr *ma; uint8_t addrlo[ETHER_ADDR_LEN]; uint8_t addrhi[ETHER_ADDR_LEN]; int error; error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); if (error != 0) return (error); TAILQ_FOREACH(ma, &sc->sc_multiaddrs, m_entry) { if (aggr_multi_eq(ma, addrlo, addrhi)) { ma->m_refs++; return (0); } } ma = malloc(sizeof(*ma), M_DEVBUF, M_WAITOK|M_CANFAIL|M_ZERO); if (ma == NULL) return (ENOMEM); ma->m_refs = 1; memcpy(&ma->m_addr, &ifr->ifr_addr, ifr->ifr_addr.sa_len); memcpy(ma->m_addrlo, addrlo, sizeof(ma->m_addrlo)); memcpy(ma->m_addrhi, addrhi, sizeof(ma->m_addrhi)); TAILQ_INSERT_TAIL(&sc->sc_multiaddrs, ma, m_entry); TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { struct ifnet *ifp0 = p->p_ifp0; if (aggr_multi(sc, p, ma, SIOCADDMULTI) != 0) { log(LOG_WARNING, "%s %s: " "unable to add multicast address\n", ifp->if_xname, ifp0->if_xname); } } return (0); } int aggr_multi_del(struct aggr_softc *sc, struct ifreq *ifr) { struct ifnet *ifp = &sc->sc_if; struct aggr_port *p; struct aggr_multiaddr *ma; uint8_t addrlo[ETHER_ADDR_LEN]; uint8_t addrhi[ETHER_ADDR_LEN]; int error; error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi); if (error != 0) return (error); TAILQ_FOREACH(ma, &sc->sc_multiaddrs, m_entry) { if (aggr_multi_eq(ma, addrlo, addrhi)) break; } if (ma == NULL) return (EINVAL); if (--ma->m_refs > 0) return (0); TAILQ_REMOVE(&sc->sc_multiaddrs, ma, m_entry); TAILQ_FOREACH(p, &sc->sc_ports, p_entry) { struct ifnet *ifp0 = p->p_ifp0; if (aggr_multi(sc, p, ma, SIOCDELMULTI) != 0) { log(LOG_WARNING, "%s %s: " "unable to delete multicast address\n", ifp->if_xname, ifp0->if_xname); } } free(ma, M_DEVBUF, sizeof(*ma)); return (0); }