ieee8023ad_lacp.c

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    1 /*      $NetBSD: ieee8023ad_lacp.c,v 1.3 2005/12/11 12:24:54 christos Exp $     */
    2 
    3 /*-
    4  * SPDX-License-Identifier: BSD-2-Clause-NetBSD
    5  *
    6  * Copyright (c)2005 YAMAMOTO Takashi,
    7  * Copyright (c)2008 Andrew Thompson <thompsa@FreeBSD.org>
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 __FBSDID("$FreeBSD$");
   34 
   35 #include "opt_kern_tls.h"
   36 #include "opt_ratelimit.h"
   37 
   38 #include <sys/param.h>
   39 #include <sys/callout.h>
   40 #include <sys/eventhandler.h>
   41 #include <sys/mbuf.h>
   42 #include <sys/systm.h>
   43 #include <sys/malloc.h>
   44 #include <sys/kernel.h> /* hz */
   45 #include <sys/socket.h> /* for net/if.h */
   46 #include <sys/sockio.h>
   47 #include <sys/sysctl.h>
   48 #include <machine/stdarg.h>
   49 #include <sys/lock.h>
   50 #include <sys/rwlock.h>
   51 #include <sys/taskqueue.h>
   52 #include <sys/time.h>
   53 
   54 #include <net/if.h>
   55 #include <net/if_var.h>
   56 #include <net/if_private.h>
   57 #include <net/if_dl.h>
   58 #include <net/ethernet.h>
   59 #include <net/infiniband.h>
   60 #include <net/if_media.h>
   61 #include <net/if_types.h>
   62 
   63 #include <net/if_lagg.h>
   64 #include <net/ieee8023ad_lacp.h>
   65 
   66 /*
   67  * actor system priority and port priority.
   68  * XXX should be configurable.
   69  */
   70 
   71 #define LACP_SYSTEM_PRIO        0x8000
   72 #define LACP_PORT_PRIO          0x8000
   73 
   74 const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN] =
   75     { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x02 };
   76 
   77 static const struct tlv_template lacp_info_tlv_template[] = {
   78         { LACP_TYPE_ACTORINFO,
   79             sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
   80         { LACP_TYPE_PARTNERINFO,
   81             sizeof(struct tlvhdr) + sizeof(struct lacp_peerinfo) },
   82         { LACP_TYPE_COLLECTORINFO,
   83             sizeof(struct tlvhdr) + sizeof(struct lacp_collectorinfo) },
   84         { 0, 0 },
   85 };
   86 
   87 static const struct tlv_template marker_info_tlv_template[] = {
   88         { MARKER_TYPE_INFO,
   89             sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
   90         { 0, 0 },
   91 };
   92 
   93 static const struct tlv_template marker_response_tlv_template[] = {
   94         { MARKER_TYPE_RESPONSE,
   95             sizeof(struct tlvhdr) + sizeof(struct lacp_markerinfo) },
   96         { 0, 0 },
   97 };
   98 
   99 typedef void (*lacp_timer_func_t)(struct lacp_port *);
  100 
  101 static void     lacp_fill_actorinfo(struct lacp_port *, struct lacp_peerinfo *);
  102 static void     lacp_fill_markerinfo(struct lacp_port *,
  103                     struct lacp_markerinfo *);
  104 
  105 static uint64_t lacp_aggregator_bandwidth(struct lacp_aggregator *);
  106 static void     lacp_suppress_distributing(struct lacp_softc *,
  107                     struct lacp_aggregator *);
  108 static void     lacp_transit_expire(void *);
  109 static void     lacp_update_portmap(struct lacp_softc *);
  110 static void     lacp_select_active_aggregator(struct lacp_softc *);
  111 static uint16_t lacp_compose_key(struct lacp_port *);
  112 static int      tlv_check(const void *, size_t, const struct tlvhdr *,
  113                     const struct tlv_template *, boolean_t);
  114 static void     lacp_tick(void *);
  115 
  116 static void     lacp_fill_aggregator_id(struct lacp_aggregator *,
  117                     const struct lacp_port *);
  118 static void     lacp_fill_aggregator_id_peer(struct lacp_peerinfo *,
  119                     const struct lacp_peerinfo *);
  120 static int      lacp_aggregator_is_compatible(const struct lacp_aggregator *,
  121                     const struct lacp_port *);
  122 static int      lacp_peerinfo_is_compatible(const struct lacp_peerinfo *,
  123                     const struct lacp_peerinfo *);
  124 
  125 static struct lacp_aggregator *lacp_aggregator_get(struct lacp_softc *,
  126                     struct lacp_port *);
  127 static void     lacp_aggregator_addref(struct lacp_softc *,
  128                     struct lacp_aggregator *);
  129 static void     lacp_aggregator_delref(struct lacp_softc *,
  130                     struct lacp_aggregator *);
  131 
  132 /* receive machine */
  133 
  134 static int      lacp_pdu_input(struct lacp_port *, struct mbuf *);
  135 static int      lacp_marker_input(struct lacp_port *, struct mbuf *);
  136 static void     lacp_sm_rx(struct lacp_port *, const struct lacpdu *);
  137 static void     lacp_sm_rx_timer(struct lacp_port *);
  138 static void     lacp_sm_rx_set_expired(struct lacp_port *);
  139 static void     lacp_sm_rx_update_ntt(struct lacp_port *,
  140                     const struct lacpdu *);
  141 static void     lacp_sm_rx_record_pdu(struct lacp_port *,
  142                     const struct lacpdu *);
  143 static void     lacp_sm_rx_update_selected(struct lacp_port *,
  144                     const struct lacpdu *);
  145 static void     lacp_sm_rx_record_default(struct lacp_port *);
  146 static void     lacp_sm_rx_update_default_selected(struct lacp_port *);
  147 static void     lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *,
  148                     const struct lacp_peerinfo *);
  149 
  150 /* mux machine */
  151 
  152 static void     lacp_sm_mux(struct lacp_port *);
  153 static void     lacp_set_mux(struct lacp_port *, enum lacp_mux_state);
  154 static void     lacp_sm_mux_timer(struct lacp_port *);
  155 
  156 /* periodic transmit machine */
  157 
  158 static void     lacp_sm_ptx_update_timeout(struct lacp_port *, uint8_t);
  159 static void     lacp_sm_ptx_tx_schedule(struct lacp_port *);
  160 static void     lacp_sm_ptx_timer(struct lacp_port *);
  161 
  162 /* transmit machine */
  163 
  164 static void     lacp_sm_tx(struct lacp_port *);
  165 static void     lacp_sm_assert_ntt(struct lacp_port *);
  166 
  167 static void     lacp_run_timers(struct lacp_port *);
  168 static int      lacp_compare_peerinfo(const struct lacp_peerinfo *,
  169                     const struct lacp_peerinfo *);
  170 static int      lacp_compare_systemid(const struct lacp_systemid *,
  171                     const struct lacp_systemid *);
  172 static void     lacp_port_enable(struct lacp_port *);
  173 static void     lacp_port_disable(struct lacp_port *);
  174 static void     lacp_select(struct lacp_port *);
  175 static void     lacp_unselect(struct lacp_port *);
  176 static void     lacp_disable_collecting(struct lacp_port *);
  177 static void     lacp_enable_collecting(struct lacp_port *);
  178 static void     lacp_disable_distributing(struct lacp_port *);
  179 static void     lacp_enable_distributing(struct lacp_port *);
  180 static int      lacp_xmit_lacpdu(struct lacp_port *);
  181 static int      lacp_xmit_marker(struct lacp_port *);
  182 
  183 /* Debugging */
  184 
  185 static void     lacp_dump_lacpdu(const struct lacpdu *);
  186 static const char *lacp_format_partner(const struct lacp_peerinfo *, char *,
  187                     size_t);
  188 static const char *lacp_format_lagid(const struct lacp_peerinfo *,
  189                     const struct lacp_peerinfo *, char *, size_t);
  190 static const char *lacp_format_lagid_aggregator(const struct lacp_aggregator *,
  191                     char *, size_t);
  192 static const char *lacp_format_state(uint8_t, char *, size_t);
  193 static const char *lacp_format_mac(const uint8_t *, char *, size_t);
  194 static const char *lacp_format_systemid(const struct lacp_systemid *, char *,
  195                     size_t);
  196 static const char *lacp_format_portid(const struct lacp_portid *, char *,
  197                     size_t);
  198 static void     lacp_dprintf(const struct lacp_port *, const char *, ...)
  199                     __attribute__((__format__(__printf__, 2, 3)));
  200 
  201 VNET_DEFINE_STATIC(int, lacp_debug);
  202 #define V_lacp_debug    VNET(lacp_debug)
  203 SYSCTL_NODE(_net_link_lagg, OID_AUTO, lacp, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
  204     "ieee802.3ad");
  205 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, debug, CTLFLAG_RWTUN | CTLFLAG_VNET,
  206     &VNET_NAME(lacp_debug), 0, "Enable LACP debug logging (1=debug, 2=trace)");
  207 
  208 VNET_DEFINE_STATIC(int, lacp_default_strict_mode) = 1;
  209 SYSCTL_INT(_net_link_lagg_lacp, OID_AUTO, default_strict_mode,
  210     CTLFLAG_RWTUN | CTLFLAG_VNET, &VNET_NAME(lacp_default_strict_mode), 0,
  211     "LACP strict protocol compliance default");
  212 #define LACP_DPRINTF(a) if (V_lacp_debug & 0x01) { lacp_dprintf a ; }
  213 #define LACP_TRACE(a) if (V_lacp_debug & 0x02) { lacp_dprintf(a,"%s\n",__func__); }
  214 #define LACP_TPRINTF(a) if (V_lacp_debug & 0x04) { lacp_dprintf a ; }
  215 
  216 /*
  217  * partner administration variables.
  218  * XXX should be configurable.
  219  */
  220 
  221 static const struct lacp_peerinfo lacp_partner_admin_optimistic = {
  222         .lip_systemid = { .lsi_prio = 0xffff },
  223         .lip_portid = { .lpi_prio = 0xffff },
  224         .lip_state = LACP_STATE_SYNC | LACP_STATE_AGGREGATION |
  225             LACP_STATE_COLLECTING | LACP_STATE_DISTRIBUTING,
  226 };
  227 
  228 static const struct lacp_peerinfo lacp_partner_admin_strict = {
  229         .lip_systemid = { .lsi_prio = 0xffff },
  230         .lip_portid = { .lpi_prio = 0xffff },
  231         .lip_state = 0,
  232 };
  233 
  234 static const lacp_timer_func_t lacp_timer_funcs[LACP_NTIMER] = {
  235         [LACP_TIMER_CURRENT_WHILE] = lacp_sm_rx_timer,
  236         [LACP_TIMER_PERIODIC] = lacp_sm_ptx_timer,
  237         [LACP_TIMER_WAIT_WHILE] = lacp_sm_mux_timer,
  238 };
  239 
  240 struct mbuf *
  241 lacp_input(struct lagg_port *lgp, struct mbuf *m)
  242 {
  243         struct lacp_port *lp = LACP_PORT(lgp);
  244         uint8_t subtype;
  245 
  246         if (m->m_pkthdr.len < sizeof(struct ether_header) + sizeof(subtype)) {
  247                 m_freem(m);
  248                 return (NULL);
  249         }
  250 
  251         m_copydata(m, sizeof(struct ether_header), sizeof(subtype), &subtype);
  252         switch (subtype) {
  253                 case SLOWPROTOCOLS_SUBTYPE_LACP:
  254                         lacp_pdu_input(lp, m);
  255                         return (NULL);
  256 
  257                 case SLOWPROTOCOLS_SUBTYPE_MARKER:
  258                         lacp_marker_input(lp, m);
  259                         return (NULL);
  260         }
  261 
  262         /* Not a subtype we are interested in */
  263         return (m);
  264 }
  265 
  266 /*
  267  * lacp_pdu_input: process lacpdu
  268  */
  269 static int
  270 lacp_pdu_input(struct lacp_port *lp, struct mbuf *m)
  271 {
  272         struct lacp_softc *lsc = lp->lp_lsc;
  273         struct lacpdu *du;
  274         int error = 0;
  275 
  276         if (m->m_pkthdr.len != sizeof(*du)) {
  277                 goto bad;
  278         }
  279 
  280         if ((m->m_flags & M_MCAST) == 0) {
  281                 goto bad;
  282         }
  283 
  284         if (m->m_len < sizeof(*du)) {
  285                 m = m_pullup(m, sizeof(*du));
  286                 if (m == NULL) {
  287                         return (ENOMEM);
  288                 }
  289         }
  290 
  291         du = mtod(m, struct lacpdu *);
  292 
  293         if (memcmp(&du->ldu_eh.ether_dhost,
  294             &ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
  295                 goto bad;
  296         }
  297 
  298         /*
  299          * ignore the version for compatibility with
  300          * the future protocol revisions.
  301          */
  302 #if 0
  303         if (du->ldu_sph.sph_version != 1) {
  304                 goto bad;
  305         }
  306 #endif
  307 
  308         /*
  309          * ignore tlv types for compatibility with
  310          * the future protocol revisions.
  311          */
  312         if (tlv_check(du, sizeof(*du), &du->ldu_tlv_actor,
  313             lacp_info_tlv_template, FALSE)) {
  314                 goto bad;
  315         }
  316 
  317         if (V_lacp_debug > 0) {
  318                 lacp_dprintf(lp, "lacpdu receive\n");
  319                 lacp_dump_lacpdu(du);
  320         }
  321 
  322         if ((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_rx_test) {
  323                 LACP_TPRINTF((lp, "Dropping RX PDU\n"));
  324                 goto bad;
  325         }
  326 
  327         LACP_LOCK(lsc);
  328         lacp_sm_rx(lp, du);
  329         LACP_UNLOCK(lsc);
  330 
  331         m_freem(m);
  332         return (error);
  333 
  334 bad:
  335         m_freem(m);
  336         return (EINVAL);
  337 }
  338 
  339 static void
  340 lacp_fill_actorinfo(struct lacp_port *lp, struct lacp_peerinfo *info)
  341 {
  342         struct lagg_port *lgp = lp->lp_lagg;
  343         struct lagg_softc *sc = lgp->lp_softc;
  344 
  345         info->lip_systemid.lsi_prio = htons(LACP_SYSTEM_PRIO);
  346         memcpy(&info->lip_systemid.lsi_mac,
  347             IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
  348         info->lip_portid.lpi_prio = htons(LACP_PORT_PRIO);
  349         info->lip_portid.lpi_portno = htons(lp->lp_ifp->if_index);
  350         info->lip_state = lp->lp_state;
  351 }
  352 
  353 static void
  354 lacp_fill_markerinfo(struct lacp_port *lp, struct lacp_markerinfo *info)
  355 {
  356         struct ifnet *ifp = lp->lp_ifp;
  357 
  358         /* Fill in the port index and system id (encoded as the MAC) */
  359         info->mi_rq_port = htons(ifp->if_index);
  360         memcpy(&info->mi_rq_system, lp->lp_systemid.lsi_mac, ETHER_ADDR_LEN);
  361         info->mi_rq_xid = htonl(0);
  362 }
  363 
  364 static int
  365 lacp_xmit_lacpdu(struct lacp_port *lp)
  366 {
  367         struct lagg_port *lgp = lp->lp_lagg;
  368         struct mbuf *m;
  369         struct lacpdu *du;
  370         int error;
  371 
  372         LACP_LOCK_ASSERT(lp->lp_lsc);
  373 
  374         m = m_gethdr(M_NOWAIT, MT_DATA);
  375         if (m == NULL) {
  376                 return (ENOMEM);
  377         }
  378         m->m_len = m->m_pkthdr.len = sizeof(*du);
  379 
  380         du = mtod(m, struct lacpdu *);
  381         memset(du, 0, sizeof(*du));
  382 
  383         memcpy(&du->ldu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
  384             ETHER_ADDR_LEN);
  385         memcpy(&du->ldu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
  386         du->ldu_eh.ether_type = htons(ETHERTYPE_SLOW);
  387 
  388         du->ldu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_LACP;
  389         du->ldu_sph.sph_version = 1;
  390 
  391         TLV_SET(&du->ldu_tlv_actor, LACP_TYPE_ACTORINFO, sizeof(du->ldu_actor));
  392         du->ldu_actor = lp->lp_actor;
  393 
  394         TLV_SET(&du->ldu_tlv_partner, LACP_TYPE_PARTNERINFO,
  395             sizeof(du->ldu_partner));
  396         du->ldu_partner = lp->lp_partner;
  397 
  398         TLV_SET(&du->ldu_tlv_collector, LACP_TYPE_COLLECTORINFO,
  399             sizeof(du->ldu_collector));
  400         du->ldu_collector.lci_maxdelay = 0;
  401 
  402         if (V_lacp_debug > 0) {
  403                 lacp_dprintf(lp, "lacpdu transmit\n");
  404                 lacp_dump_lacpdu(du);
  405         }
  406 
  407         m->m_flags |= M_MCAST;
  408 
  409         /*
  410          * XXX should use higher priority queue.
  411          * otherwise network congestion can break aggregation.
  412          */
  413 
  414         error = lagg_enqueue(lp->lp_ifp, m);
  415         return (error);
  416 }
  417 
  418 static int
  419 lacp_xmit_marker(struct lacp_port *lp)
  420 {
  421         struct lagg_port *lgp = lp->lp_lagg;
  422         struct mbuf *m;
  423         struct markerdu *mdu;
  424         int error;
  425 
  426         LACP_LOCK_ASSERT(lp->lp_lsc);
  427 
  428         m = m_gethdr(M_NOWAIT, MT_DATA);
  429         if (m == NULL) {
  430                 return (ENOMEM);
  431         }
  432         m->m_len = m->m_pkthdr.len = sizeof(*mdu);
  433 
  434         mdu = mtod(m, struct markerdu *);
  435         memset(mdu, 0, sizeof(*mdu));
  436 
  437         memcpy(&mdu->mdu_eh.ether_dhost, ethermulticastaddr_slowprotocols,
  438             ETHER_ADDR_LEN);
  439         memcpy(&mdu->mdu_eh.ether_shost, lgp->lp_lladdr, ETHER_ADDR_LEN);
  440         mdu->mdu_eh.ether_type = htons(ETHERTYPE_SLOW);
  441 
  442         mdu->mdu_sph.sph_subtype = SLOWPROTOCOLS_SUBTYPE_MARKER;
  443         mdu->mdu_sph.sph_version = 1;
  444 
  445         /* Bump the transaction id and copy over the marker info */
  446         lp->lp_marker.mi_rq_xid = htonl(ntohl(lp->lp_marker.mi_rq_xid) + 1);
  447         TLV_SET(&mdu->mdu_tlv, MARKER_TYPE_INFO, sizeof(mdu->mdu_info));
  448         mdu->mdu_info = lp->lp_marker;
  449 
  450         LACP_DPRINTF((lp, "marker transmit, port=%u, sys=%6D, id=%u\n",
  451             ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system, ":",
  452             ntohl(mdu->mdu_info.mi_rq_xid)));
  453 
  454         m->m_flags |= M_MCAST;
  455         error = lagg_enqueue(lp->lp_ifp, m);
  456         return (error);
  457 }
  458 
  459 void
  460 lacp_linkstate(struct lagg_port *lgp)
  461 {
  462         struct lacp_port *lp = LACP_PORT(lgp);
  463         struct lacp_softc *lsc = lp->lp_lsc;
  464         struct ifnet *ifp = lgp->lp_ifp;
  465         struct ifmediareq ifmr;
  466         int error = 0;
  467         u_int media;
  468         uint8_t old_state;
  469         uint16_t old_key;
  470 
  471         bzero((char *)&ifmr, sizeof(ifmr));
  472         error = (*ifp->if_ioctl)(ifp, SIOCGIFXMEDIA, (caddr_t)&ifmr);
  473         if (error != 0) {
  474                 bzero((char *)&ifmr, sizeof(ifmr));
  475                 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr);
  476         }
  477         if (error != 0)
  478                 return;
  479 
  480         LACP_LOCK(lsc);
  481         media = ifmr.ifm_active;
  482         LACP_DPRINTF((lp, "media changed 0x%x -> 0x%x, ether = %d, fdx = %d, "
  483             "link = %d\n", lp->lp_media, media, IFM_TYPE(media) == IFM_ETHER,
  484             (media & IFM_FDX) != 0, ifp->if_link_state == LINK_STATE_UP));
  485         old_state = lp->lp_state;
  486         old_key = lp->lp_key;
  487 
  488         lp->lp_media = media;
  489         /*
  490          * If the port is not an active full duplex Ethernet link then it can
  491          * not be aggregated.
  492          */
  493         if (IFM_TYPE(media) != IFM_ETHER || (media & IFM_FDX) == 0 ||
  494             ifp->if_link_state != LINK_STATE_UP) {
  495                 lacp_port_disable(lp);
  496         } else {
  497                 lacp_port_enable(lp);
  498         }
  499         lp->lp_key = lacp_compose_key(lp);
  500 
  501         if (old_state != lp->lp_state || old_key != lp->lp_key) {
  502                 LACP_DPRINTF((lp, "-> UNSELECTED\n"));
  503                 lp->lp_selected = LACP_UNSELECTED;
  504         }
  505         LACP_UNLOCK(lsc);
  506 }
  507 
  508 static void
  509 lacp_tick(void *arg)
  510 {
  511         struct lacp_softc *lsc = arg;
  512         struct lacp_port *lp;
  513 
  514         LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
  515                 if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0)
  516                         continue;
  517 
  518                 CURVNET_SET(lp->lp_ifp->if_vnet);
  519                 lacp_run_timers(lp);
  520 
  521                 lacp_select(lp);
  522                 lacp_sm_mux(lp);
  523                 lacp_sm_tx(lp);
  524                 lacp_sm_ptx_tx_schedule(lp);
  525                 CURVNET_RESTORE();
  526         }
  527         callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
  528 }
  529 
  530 int
  531 lacp_port_create(struct lagg_port *lgp)
  532 {
  533         struct lagg_softc *sc = lgp->lp_softc;
  534         struct lacp_softc *lsc = LACP_SOFTC(sc);
  535         struct lacp_port *lp;
  536         struct ifnet *ifp = lgp->lp_ifp;
  537         struct sockaddr_dl sdl;
  538         struct ifmultiaddr *rifma = NULL;
  539         int error;
  540 
  541         link_init_sdl(ifp, (struct sockaddr *)&sdl, IFT_ETHER);
  542         sdl.sdl_alen = ETHER_ADDR_LEN;
  543 
  544         bcopy(&ethermulticastaddr_slowprotocols,
  545             LLADDR(&sdl), ETHER_ADDR_LEN);
  546         error = if_addmulti(ifp, (struct sockaddr *)&sdl, &rifma);
  547         if (error) {
  548                 printf("%s: ADDMULTI failed on %s\n", __func__,
  549                     lgp->lp_ifp->if_xname);
  550                 return (error);
  551         }
  552 
  553         lp = malloc(sizeof(struct lacp_port),
  554             M_DEVBUF, M_NOWAIT|M_ZERO);
  555         if (lp == NULL)
  556                 return (ENOMEM);
  557 
  558         LACP_LOCK(lsc);
  559         lgp->lp_psc = lp;
  560         lp->lp_ifp = ifp;
  561         lp->lp_lagg = lgp;
  562         lp->lp_lsc = lsc;
  563         lp->lp_ifma = rifma;
  564 
  565         LIST_INSERT_HEAD(&lsc->lsc_ports, lp, lp_next);
  566 
  567         lacp_fill_actorinfo(lp, &lp->lp_actor);
  568         lacp_fill_markerinfo(lp, &lp->lp_marker);
  569         lp->lp_state = LACP_STATE_ACTIVITY;
  570         lp->lp_aggregator = NULL;
  571         lacp_sm_rx_set_expired(lp);
  572         LACP_UNLOCK(lsc);
  573         lacp_linkstate(lgp);
  574 
  575         return (0);
  576 }
  577 
  578 void
  579 lacp_port_destroy(struct lagg_port *lgp)
  580 {
  581         struct lacp_port *lp = LACP_PORT(lgp);
  582         struct lacp_softc *lsc = lp->lp_lsc;
  583         int i;
  584 
  585         LACP_LOCK(lsc);
  586         for (i = 0; i < LACP_NTIMER; i++) {
  587                 LACP_TIMER_DISARM(lp, i);
  588         }
  589 
  590         lacp_disable_collecting(lp);
  591         lacp_disable_distributing(lp);
  592         lacp_unselect(lp);
  593 
  594         LIST_REMOVE(lp, lp_next);
  595         LACP_UNLOCK(lsc);
  596 
  597         /* The address may have already been removed by if_purgemaddrs() */
  598         if (!lgp->lp_detaching)
  599                 if_delmulti_ifma(lp->lp_ifma);
  600 
  601         free(lp, M_DEVBUF);
  602 }
  603 
  604 void
  605 lacp_req(struct lagg_softc *sc, void *data)
  606 {
  607         struct lacp_opreq *req = (struct lacp_opreq *)data;
  608         struct lacp_softc *lsc = LACP_SOFTC(sc);
  609         struct lacp_aggregator *la;
  610 
  611         bzero(req, sizeof(struct lacp_opreq));
  612 
  613         /*
  614          * If the LACP softc is NULL, return with the opreq structure full of
  615          * zeros.  It is normal for the softc to be NULL while the lagg is
  616          * being destroyed.
  617          */
  618         if (NULL == lsc)
  619                 return;
  620 
  621         la = lsc->lsc_active_aggregator;
  622         LACP_LOCK(lsc);
  623         if (la != NULL) {
  624                 req->actor_prio = ntohs(la->la_actor.lip_systemid.lsi_prio);
  625                 memcpy(&req->actor_mac, &la->la_actor.lip_systemid.lsi_mac,
  626                     ETHER_ADDR_LEN);
  627                 req->actor_key = ntohs(la->la_actor.lip_key);
  628                 req->actor_portprio = ntohs(la->la_actor.lip_portid.lpi_prio);
  629                 req->actor_portno = ntohs(la->la_actor.lip_portid.lpi_portno);
  630                 req->actor_state = la->la_actor.lip_state;
  631 
  632                 req->partner_prio = ntohs(la->la_partner.lip_systemid.lsi_prio);
  633                 memcpy(&req->partner_mac, &la->la_partner.lip_systemid.lsi_mac,
  634                     ETHER_ADDR_LEN);
  635                 req->partner_key = ntohs(la->la_partner.lip_key);
  636                 req->partner_portprio = ntohs(la->la_partner.lip_portid.lpi_prio);
  637                 req->partner_portno = ntohs(la->la_partner.lip_portid.lpi_portno);
  638                 req->partner_state = la->la_partner.lip_state;
  639         }
  640         LACP_UNLOCK(lsc);
  641 }
  642 
  643 void
  644 lacp_portreq(struct lagg_port *lgp, void *data)
  645 {
  646         struct lacp_opreq *req = (struct lacp_opreq *)data;
  647         struct lacp_port *lp = LACP_PORT(lgp);
  648         struct lacp_softc *lsc = lp->lp_lsc;
  649 
  650         LACP_LOCK(lsc);
  651         req->actor_prio = ntohs(lp->lp_actor.lip_systemid.lsi_prio);
  652         memcpy(&req->actor_mac, &lp->lp_actor.lip_systemid.lsi_mac,
  653             ETHER_ADDR_LEN);
  654         req->actor_key = ntohs(lp->lp_actor.lip_key);
  655         req->actor_portprio = ntohs(lp->lp_actor.lip_portid.lpi_prio);
  656         req->actor_portno = ntohs(lp->lp_actor.lip_portid.lpi_portno);
  657         req->actor_state = lp->lp_actor.lip_state;
  658 
  659         req->partner_prio = ntohs(lp->lp_partner.lip_systemid.lsi_prio);
  660         memcpy(&req->partner_mac, &lp->lp_partner.lip_systemid.lsi_mac,
  661             ETHER_ADDR_LEN);
  662         req->partner_key = ntohs(lp->lp_partner.lip_key);
  663         req->partner_portprio = ntohs(lp->lp_partner.lip_portid.lpi_prio);
  664         req->partner_portno = ntohs(lp->lp_partner.lip_portid.lpi_portno);
  665         req->partner_state = lp->lp_partner.lip_state;
  666         LACP_UNLOCK(lsc);
  667 }
  668 
  669 static void
  670 lacp_disable_collecting(struct lacp_port *lp)
  671 {
  672         LACP_DPRINTF((lp, "collecting disabled\n"));
  673         lp->lp_state &= ~LACP_STATE_COLLECTING;
  674 }
  675 
  676 static void
  677 lacp_enable_collecting(struct lacp_port *lp)
  678 {
  679         LACP_DPRINTF((lp, "collecting enabled\n"));
  680         lp->lp_state |= LACP_STATE_COLLECTING;
  681 }
  682 
  683 static void
  684 lacp_disable_distributing(struct lacp_port *lp)
  685 {
  686         struct lacp_aggregator *la = lp->lp_aggregator;
  687         struct lacp_softc *lsc = lp->lp_lsc;
  688         struct lagg_softc *sc = lsc->lsc_softc;
  689         char buf[LACP_LAGIDSTR_MAX+1];
  690 
  691         LACP_LOCK_ASSERT(lsc);
  692 
  693         if (la == NULL || (lp->lp_state & LACP_STATE_DISTRIBUTING) == 0) {
  694                 return;
  695         }
  696 
  697         KASSERT(!TAILQ_EMPTY(&la->la_ports), ("no aggregator ports"));
  698         KASSERT(la->la_nports > 0, ("nports invalid (%d)", la->la_nports));
  699         KASSERT(la->la_refcnt >= la->la_nports, ("aggregator refcnt invalid"));
  700 
  701         LACP_DPRINTF((lp, "disable distributing on aggregator %s, "
  702             "nports %d -> %d\n",
  703             lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
  704             la->la_nports, la->la_nports - 1));
  705 
  706         TAILQ_REMOVE(&la->la_ports, lp, lp_dist_q);
  707         la->la_nports--;
  708         sc->sc_active = la->la_nports;
  709 
  710         if (lsc->lsc_active_aggregator == la) {
  711                 lacp_suppress_distributing(lsc, la);
  712                 lacp_select_active_aggregator(lsc);
  713                 /* regenerate the port map, the active aggregator has changed */
  714                 lacp_update_portmap(lsc);
  715         }
  716 
  717         lp->lp_state &= ~LACP_STATE_DISTRIBUTING;
  718         if_link_state_change(sc->sc_ifp,
  719             sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
  720 }
  721 
  722 static void
  723 lacp_enable_distributing(struct lacp_port *lp)
  724 {
  725         struct lacp_aggregator *la = lp->lp_aggregator;
  726         struct lacp_softc *lsc = lp->lp_lsc;
  727         struct lagg_softc *sc = lsc->lsc_softc;
  728         char buf[LACP_LAGIDSTR_MAX+1];
  729 
  730         LACP_LOCK_ASSERT(lsc);
  731 
  732         if ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0) {
  733                 return;
  734         }
  735 
  736         LACP_DPRINTF((lp, "enable distributing on aggregator %s, "
  737             "nports %d -> %d\n",
  738             lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
  739             la->la_nports, la->la_nports + 1));
  740 
  741         KASSERT(la->la_refcnt > la->la_nports, ("aggregator refcnt invalid"));
  742         TAILQ_INSERT_HEAD(&la->la_ports, lp, lp_dist_q);
  743         la->la_nports++;
  744         sc->sc_active = la->la_nports;
  745 
  746         lp->lp_state |= LACP_STATE_DISTRIBUTING;
  747 
  748         if (lsc->lsc_active_aggregator == la) {
  749                 lacp_suppress_distributing(lsc, la);
  750                 lacp_update_portmap(lsc);
  751         } else
  752                 /* try to become the active aggregator */
  753                 lacp_select_active_aggregator(lsc);
  754 
  755         if_link_state_change(sc->sc_ifp,
  756             sc->sc_active ? LINK_STATE_UP : LINK_STATE_DOWN);
  757 }
  758 
  759 static void
  760 lacp_transit_expire(void *vp)
  761 {
  762         struct lacp_softc *lsc = vp;
  763 
  764         LACP_LOCK_ASSERT(lsc);
  765 
  766         CURVNET_SET(lsc->lsc_softc->sc_ifp->if_vnet);
  767         LACP_TRACE(NULL);
  768         CURVNET_RESTORE();
  769 
  770         lsc->lsc_suppress_distributing = FALSE;
  771 }
  772 
  773 void
  774 lacp_attach(struct lagg_softc *sc)
  775 {
  776         struct lacp_softc *lsc;
  777 
  778         lsc = malloc(sizeof(struct lacp_softc), M_DEVBUF, M_WAITOK | M_ZERO);
  779 
  780         sc->sc_psc = lsc;
  781         lsc->lsc_softc = sc;
  782 
  783         lsc->lsc_hashkey = m_ether_tcpip_hash_init();
  784         lsc->lsc_active_aggregator = NULL;
  785         lsc->lsc_strict_mode = VNET(lacp_default_strict_mode);
  786         LACP_LOCK_INIT(lsc);
  787         TAILQ_INIT(&lsc->lsc_aggregators);
  788         LIST_INIT(&lsc->lsc_ports);
  789 
  790         callout_init_mtx(&lsc->lsc_transit_callout, &lsc->lsc_mtx, 0);
  791         callout_init_mtx(&lsc->lsc_callout, &lsc->lsc_mtx, 0);
  792 
  793         /* if the lagg is already up then do the same */
  794         if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
  795                 lacp_init(sc);
  796 }
  797 
  798 void
  799 lacp_detach(void *psc)
  800 {
  801         struct lacp_softc *lsc = (struct lacp_softc *)psc;
  802 
  803         KASSERT(TAILQ_EMPTY(&lsc->lsc_aggregators),
  804             ("aggregators still active"));
  805         KASSERT(lsc->lsc_active_aggregator == NULL,
  806             ("aggregator still attached"));
  807 
  808         callout_drain(&lsc->lsc_transit_callout);
  809         callout_drain(&lsc->lsc_callout);
  810 
  811         LACP_LOCK_DESTROY(lsc);
  812         free(lsc, M_DEVBUF);
  813 }
  814 
  815 void
  816 lacp_init(struct lagg_softc *sc)
  817 {
  818         struct lacp_softc *lsc = LACP_SOFTC(sc);
  819 
  820         LACP_LOCK(lsc);
  821         callout_reset(&lsc->lsc_callout, hz, lacp_tick, lsc);
  822         LACP_UNLOCK(lsc);
  823 }
  824 
  825 void
  826 lacp_stop(struct lagg_softc *sc)
  827 {
  828         struct lacp_softc *lsc = LACP_SOFTC(sc);
  829 
  830         LACP_LOCK(lsc);
  831         callout_stop(&lsc->lsc_transit_callout);
  832         callout_stop(&lsc->lsc_callout);
  833         LACP_UNLOCK(lsc);
  834 }
  835 
  836 struct lagg_port *
  837 lacp_select_tx_port_by_hash(struct lagg_softc *sc, uint32_t hash,
  838     uint8_t numa_domain, int *err)
  839 {
  840         struct lacp_softc *lsc = LACP_SOFTC(sc);
  841         struct lacp_portmap *pm;
  842         struct lacp_port *lp;
  843         struct lacp_port **map;
  844         int count;
  845 
  846         if (__predict_false(lsc->lsc_suppress_distributing)) {
  847                 LACP_DPRINTF((NULL, "%s: waiting transit\n", __func__));
  848                 *err = ENOBUFS;
  849                 return (NULL);
  850         }
  851 
  852         pm = &lsc->lsc_pmap[lsc->lsc_activemap];
  853         if (pm->pm_count == 0) {
  854                 LACP_DPRINTF((NULL, "%s: no active aggregator\n", __func__));
  855                 *err = ENETDOWN;
  856                 return (NULL);
  857         }
  858 
  859 #ifdef NUMA
  860         if ((sc->sc_opts & LAGG_OPT_USE_NUMA) &&
  861             pm->pm_num_dom > 1 && numa_domain < MAXMEMDOM) {
  862                 count = pm->pm_numa[numa_domain].count;
  863                 if (count > 0) {
  864                         map = pm->pm_numa[numa_domain].map;
  865                 } else {
  866                         /* No ports on this domain; use global hash. */
  867                         map = pm->pm_map;
  868                         count = pm->pm_count;
  869                 }
  870         } else
  871 #endif
  872         {
  873                 map = pm->pm_map;
  874                 count = pm->pm_count;
  875         }
  876 
  877         hash %= count;
  878         lp = map[hash];
  879 
  880         return (lp->lp_lagg);
  881 }
  882 
  883 struct lagg_port *
  884 lacp_select_tx_port(struct lagg_softc *sc, struct mbuf *m, int *err)
  885 {
  886         struct lacp_softc *lsc = LACP_SOFTC(sc);
  887         uint32_t hash;
  888         uint8_t numa_domain;
  889 
  890         if ((sc->sc_opts & LAGG_OPT_USE_FLOWID) &&
  891             M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
  892                 hash = m->m_pkthdr.flowid >> sc->flowid_shift;
  893         else
  894                 hash = m_ether_tcpip_hash(sc->sc_flags, m, lsc->lsc_hashkey);
  895 
  896         numa_domain = m->m_pkthdr.numa_domain;
  897         return (lacp_select_tx_port_by_hash(sc, hash, numa_domain, err));
  898 }
  899 
  900 /*
  901  * lacp_suppress_distributing: drop transmit packets for a while
  902  * to preserve packet ordering.
  903  */
  904 
  905 static void
  906 lacp_suppress_distributing(struct lacp_softc *lsc, struct lacp_aggregator *la)
  907 {
  908         struct lacp_port *lp;
  909 
  910         if (lsc->lsc_active_aggregator != la) {
  911                 return;
  912         }
  913 
  914         LACP_TRACE(NULL);
  915 
  916         lsc->lsc_suppress_distributing = TRUE;
  917 
  918         /* send a marker frame down each port to verify the queues are empty */
  919         LIST_FOREACH(lp, &lsc->lsc_ports, lp_next) {
  920                 lp->lp_flags |= LACP_PORT_MARK;
  921                 if (lacp_xmit_marker(lp) != 0)
  922                         lp->lp_flags &= ~LACP_PORT_MARK;
  923         }
  924 
  925         /* set a timeout for the marker frames */
  926         callout_reset(&lsc->lsc_transit_callout,
  927             LACP_TRANSIT_DELAY * hz / 1000, lacp_transit_expire, lsc);
  928 }
  929 
  930 static int
  931 lacp_compare_peerinfo(const struct lacp_peerinfo *a,
  932     const struct lacp_peerinfo *b)
  933 {
  934         return (memcmp(a, b, offsetof(struct lacp_peerinfo, lip_state)));
  935 }
  936 
  937 static int
  938 lacp_compare_systemid(const struct lacp_systemid *a,
  939     const struct lacp_systemid *b)
  940 {
  941         return (memcmp(a, b, sizeof(*a)));
  942 }
  943 
  944 #if 0   /* unused */
  945 static int
  946 lacp_compare_portid(const struct lacp_portid *a,
  947     const struct lacp_portid *b)
  948 {
  949         return (memcmp(a, b, sizeof(*a)));
  950 }
  951 #endif
  952 
  953 static uint64_t
  954 lacp_aggregator_bandwidth(struct lacp_aggregator *la)
  955 {
  956         struct lacp_port *lp;
  957         uint64_t speed;
  958 
  959         lp = TAILQ_FIRST(&la->la_ports);
  960         if (lp == NULL) {
  961                 return (0);
  962         }
  963 
  964         speed = ifmedia_baudrate(lp->lp_media);
  965         speed *= la->la_nports;
  966         if (speed == 0) {
  967                 LACP_DPRINTF((lp, "speed 0? media=0x%x nports=%d\n",
  968                     lp->lp_media, la->la_nports));
  969         }
  970 
  971         return (speed);
  972 }
  973 
  974 /*
  975  * lacp_select_active_aggregator: select an aggregator to be used to transmit
  976  * packets from lagg(4) interface.
  977  */
  978 
  979 static void
  980 lacp_select_active_aggregator(struct lacp_softc *lsc)
  981 {
  982         struct lacp_aggregator *la;
  983         struct lacp_aggregator *best_la = NULL;
  984         uint64_t best_speed = 0;
  985         char buf[LACP_LAGIDSTR_MAX+1];
  986 
  987         LACP_TRACE(NULL);
  988 
  989         TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
  990                 uint64_t speed;
  991 
  992                 if (la->la_nports == 0) {
  993                         continue;
  994                 }
  995 
  996                 speed = lacp_aggregator_bandwidth(la);
  997                 LACP_DPRINTF((NULL, "%s, speed=%jd, nports=%d\n",
  998                     lacp_format_lagid_aggregator(la, buf, sizeof(buf)),
  999                     speed, la->la_nports));
 1000 
 1001                 /*
 1002                  * This aggregator is chosen if the partner has a better
 1003                  * system priority or, the total aggregated speed is higher
 1004                  * or, it is already the chosen aggregator
 1005                  */
 1006                 if ((best_la != NULL && LACP_SYS_PRI(la->la_partner) <
 1007                     LACP_SYS_PRI(best_la->la_partner)) ||
 1008                     speed > best_speed ||
 1009                     (speed == best_speed &&
 1010                     la == lsc->lsc_active_aggregator)) {
 1011                         best_la = la;
 1012                         best_speed = speed;
 1013                 }
 1014         }
 1015 
 1016         KASSERT(best_la == NULL || best_la->la_nports > 0,
 1017             ("invalid aggregator refcnt"));
 1018         KASSERT(best_la == NULL || !TAILQ_EMPTY(&best_la->la_ports),
 1019             ("invalid aggregator list"));
 1020 
 1021         if (lsc->lsc_active_aggregator != best_la) {
 1022                 LACP_DPRINTF((NULL, "active aggregator changed\n"));
 1023                 LACP_DPRINTF((NULL, "old %s\n",
 1024                     lacp_format_lagid_aggregator(lsc->lsc_active_aggregator,
 1025                     buf, sizeof(buf))));
 1026         } else {
 1027                 LACP_DPRINTF((NULL, "active aggregator not changed\n"));
 1028         }
 1029         LACP_DPRINTF((NULL, "new %s\n",
 1030             lacp_format_lagid_aggregator(best_la, buf, sizeof(buf))));
 1031 
 1032         if (lsc->lsc_active_aggregator != best_la) {
 1033                 lsc->lsc_active_aggregator = best_la;
 1034                 lacp_update_portmap(lsc);
 1035                 if (best_la) {
 1036                         lacp_suppress_distributing(lsc, best_la);
 1037                 }
 1038         }
 1039 }
 1040 
 1041 /*
 1042  * Updated the inactive portmap array with the new list of ports and
 1043  * make it live.
 1044  */
 1045 static void
 1046 lacp_update_portmap(struct lacp_softc *lsc)
 1047 {
 1048         struct lagg_softc *sc = lsc->lsc_softc;
 1049         struct lacp_aggregator *la;
 1050         struct lacp_portmap *p;
 1051         struct lacp_port *lp;
 1052         uint64_t speed;
 1053         u_int newmap;
 1054         int i;
 1055 #ifdef NUMA
 1056         int count;
 1057         uint8_t domain;
 1058 #endif
 1059 
 1060         newmap = lsc->lsc_activemap == 0 ? 1 : 0;
 1061         p = &lsc->lsc_pmap[newmap];
 1062         la = lsc->lsc_active_aggregator;
 1063         speed = 0;
 1064         bzero(p, sizeof(struct lacp_portmap));
 1065 
 1066         if (la != NULL && la->la_nports > 0) {
 1067                 p->pm_count = la->la_nports;
 1068                 i = 0;
 1069                 TAILQ_FOREACH(lp, &la->la_ports, lp_dist_q) {
 1070                         p->pm_map[i++] = lp;
 1071 #ifdef NUMA
 1072                         domain = lp->lp_ifp->if_numa_domain;
 1073                         if (domain >= MAXMEMDOM)
 1074                                 continue;
 1075                         count = p->pm_numa[domain].count;
 1076                         p->pm_numa[domain].map[count] = lp;
 1077                         p->pm_numa[domain].count++;
 1078 #endif
 1079                 }
 1080                 KASSERT(i == p->pm_count, ("Invalid port count"));
 1081 
 1082 #ifdef NUMA
 1083                 for (i = 0; i < MAXMEMDOM; i++) {
 1084                         if (p->pm_numa[i].count != 0)
 1085                                 p->pm_num_dom++;
 1086                 }
 1087 #endif
 1088                 speed = lacp_aggregator_bandwidth(la);
 1089         }
 1090         sc->sc_ifp->if_baudrate = speed;
 1091         EVENTHANDLER_INVOKE(ifnet_event, sc->sc_ifp,
 1092             IFNET_EVENT_UPDATE_BAUDRATE);
 1093 
 1094         /* switch the active portmap over */
 1095         atomic_store_rel_int(&lsc->lsc_activemap, newmap);
 1096         LACP_DPRINTF((NULL, "Set table %d with %d ports\n",
 1097                     lsc->lsc_activemap,
 1098                     lsc->lsc_pmap[lsc->lsc_activemap].pm_count));
 1099 }
 1100 
 1101 static uint16_t
 1102 lacp_compose_key(struct lacp_port *lp)
 1103 {
 1104         struct lagg_port *lgp = lp->lp_lagg;
 1105         struct lagg_softc *sc = lgp->lp_softc;
 1106         u_int media = lp->lp_media;
 1107         uint16_t key;
 1108 
 1109         if ((lp->lp_state & LACP_STATE_AGGREGATION) == 0) {
 1110                 /*
 1111                  * non-aggregatable links should have unique keys.
 1112                  *
 1113                  * XXX this isn't really unique as if_index is 16 bit.
 1114                  */
 1115 
 1116                 /* bit 0..14:   (some bits of) if_index of this port */
 1117                 key = lp->lp_ifp->if_index;
 1118                 /* bit 15:      1 */
 1119                 key |= 0x8000;
 1120         } else {
 1121                 u_int subtype = IFM_SUBTYPE(media);
 1122 
 1123                 KASSERT(IFM_TYPE(media) == IFM_ETHER, ("invalid media type"));
 1124                 KASSERT((media & IFM_FDX) != 0, ("aggregating HDX interface"));
 1125 
 1126                 /* bit 0..4:    IFM_SUBTYPE modulo speed */
 1127                 switch (subtype) {
 1128                 case IFM_10_T:
 1129                 case IFM_10_2:
 1130                 case IFM_10_5:
 1131                 case IFM_10_STP:
 1132                 case IFM_10_FL:
 1133                         key = IFM_10_T;
 1134                         break;
 1135                 case IFM_100_TX:
 1136                 case IFM_100_FX:
 1137                 case IFM_100_T4:
 1138                 case IFM_100_VG:
 1139                 case IFM_100_T2:
 1140                 case IFM_100_T:
 1141                 case IFM_100_SGMII:
 1142                         key = IFM_100_TX;
 1143                         break;
 1144                 case IFM_1000_SX:
 1145                 case IFM_1000_LX:
 1146                 case IFM_1000_CX:
 1147                 case IFM_1000_T:
 1148                 case IFM_1000_KX:
 1149                 case IFM_1000_SGMII:
 1150                 case IFM_1000_CX_SGMII:
 1151                         key = IFM_1000_SX;
 1152                         break;
 1153                 case IFM_10G_LR:
 1154                 case IFM_10G_SR:
 1155                 case IFM_10G_CX4:
 1156                 case IFM_10G_TWINAX:
 1157                 case IFM_10G_TWINAX_LONG:
 1158                 case IFM_10G_LRM:
 1159                 case IFM_10G_T:
 1160                 case IFM_10G_KX4:
 1161                 case IFM_10G_KR:
 1162                 case IFM_10G_CR1:
 1163                 case IFM_10G_ER:
 1164                 case IFM_10G_SFI:
 1165                 case IFM_10G_AOC:
 1166                         key = IFM_10G_LR;
 1167                         break;
 1168                 case IFM_20G_KR2:
 1169                         key = IFM_20G_KR2;
 1170                         break;
 1171                 case IFM_2500_KX:
 1172                 case IFM_2500_T:
 1173                 case IFM_2500_X:
 1174                         key = IFM_2500_KX;
 1175                         break;
 1176                 case IFM_5000_T:
 1177                 case IFM_5000_KR:
 1178                 case IFM_5000_KR_S:
 1179                 case IFM_5000_KR1:
 1180                         key = IFM_5000_T;
 1181                         break;
 1182                 case IFM_50G_PCIE:
 1183                 case IFM_50G_CR2:
 1184                 case IFM_50G_KR2:
 1185                 case IFM_50G_KR4:
 1186                 case IFM_50G_SR2:
 1187                 case IFM_50G_LR2:
 1188                 case IFM_50G_LAUI2_AC:
 1189                 case IFM_50G_LAUI2:
 1190                 case IFM_50G_AUI2_AC:
 1191                 case IFM_50G_AUI2:
 1192                 case IFM_50G_CP:
 1193                 case IFM_50G_SR:
 1194                 case IFM_50G_LR:
 1195                 case IFM_50G_FR:
 1196                 case IFM_50G_KR_PAM4:
 1197                 case IFM_50G_AUI1_AC:
 1198                 case IFM_50G_AUI1:
 1199                         key = IFM_50G_PCIE;
 1200                         break;
 1201                 case IFM_56G_R4:
 1202                         key = IFM_56G_R4;
 1203                         break;
 1204                 case IFM_25G_PCIE:
 1205                 case IFM_25G_CR:
 1206                 case IFM_25G_KR:
 1207                 case IFM_25G_SR:
 1208                 case IFM_25G_LR:
 1209                 case IFM_25G_ACC:
 1210                 case IFM_25G_AOC:
 1211                 case IFM_25G_T:
 1212                 case IFM_25G_CR_S:
 1213                 case IFM_25G_CR1:
 1214                 case IFM_25G_KR_S:
 1215                 case IFM_25G_AUI:
 1216                 case IFM_25G_KR1:
 1217                         key = IFM_25G_PCIE;
 1218                         break;
 1219                 case IFM_40G_CR4:
 1220                 case IFM_40G_SR4:
 1221                 case IFM_40G_LR4:
 1222                 case IFM_40G_LM4:
 1223                 case IFM_40G_XLPPI:
 1224                 case IFM_40G_KR4:
 1225                 case IFM_40G_XLAUI:
 1226                 case IFM_40G_XLAUI_AC:
 1227                 case IFM_40G_ER4:
 1228                         key = IFM_40G_CR4;
 1229                         break;
 1230                 case IFM_100G_CR4:
 1231                 case IFM_100G_SR4:
 1232                 case IFM_100G_KR4:
 1233                 case IFM_100G_LR4:
 1234                 case IFM_100G_CAUI4_AC:
 1235                 case IFM_100G_CAUI4:
 1236                 case IFM_100G_AUI4_AC:
 1237                 case IFM_100G_AUI4:
 1238                 case IFM_100G_CR_PAM4:
 1239                 case IFM_100G_KR_PAM4:
 1240                 case IFM_100G_CP2:
 1241                 case IFM_100G_SR2:
 1242                 case IFM_100G_DR:
 1243                 case IFM_100G_KR2_PAM4:
 1244                 case IFM_100G_CAUI2_AC:
 1245                 case IFM_100G_CAUI2:
 1246                 case IFM_100G_AUI2_AC:
 1247                 case IFM_100G_AUI2:
 1248                         key = IFM_100G_CR4;
 1249                         break;
 1250                 case IFM_200G_CR4_PAM4:
 1251                 case IFM_200G_SR4:
 1252                 case IFM_200G_FR4:
 1253                 case IFM_200G_LR4:
 1254                 case IFM_200G_DR4:
 1255                 case IFM_200G_KR4_PAM4:
 1256                 case IFM_200G_AUI4_AC:
 1257                 case IFM_200G_AUI4:
 1258                 case IFM_200G_AUI8_AC:
 1259                 case IFM_200G_AUI8:
 1260                         key = IFM_200G_CR4_PAM4;
 1261                         break;
 1262                 case IFM_400G_FR8:
 1263                 case IFM_400G_LR8:
 1264                 case IFM_400G_DR4:
 1265                 case IFM_400G_AUI8_AC:
 1266                 case IFM_400G_AUI8:
 1267                         key = IFM_400G_FR8;
 1268                         break;
 1269                 default:
 1270                         key = subtype;
 1271                         break;
 1272                 }
 1273                 /* bit 5..14:   (some bits of) if_index of lagg device */
 1274                 key |= 0x7fe0 & ((sc->sc_ifp->if_index) << 5);
 1275                 /* bit 15:      0 */
 1276         }
 1277         return (htons(key));
 1278 }
 1279 
 1280 static void
 1281 lacp_aggregator_addref(struct lacp_softc *lsc, struct lacp_aggregator *la)
 1282 {
 1283         char buf[LACP_LAGIDSTR_MAX+1];
 1284 
 1285         LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
 1286             __func__,
 1287             lacp_format_lagid(&la->la_actor, &la->la_partner,
 1288             buf, sizeof(buf)),
 1289             la->la_refcnt, la->la_refcnt + 1));
 1290 
 1291         KASSERT(la->la_refcnt > 0, ("refcount <= 0"));
 1292         la->la_refcnt++;
 1293         KASSERT(la->la_refcnt > la->la_nports, ("invalid refcount"));
 1294 }
 1295 
 1296 static void
 1297 lacp_aggregator_delref(struct lacp_softc *lsc, struct lacp_aggregator *la)
 1298 {
 1299         char buf[LACP_LAGIDSTR_MAX+1];
 1300 
 1301         LACP_DPRINTF((NULL, "%s: lagid=%s, refcnt %d -> %d\n",
 1302             __func__,
 1303             lacp_format_lagid(&la->la_actor, &la->la_partner,
 1304             buf, sizeof(buf)),
 1305             la->la_refcnt, la->la_refcnt - 1));
 1306 
 1307         KASSERT(la->la_refcnt > la->la_nports, ("invalid refcnt"));
 1308         la->la_refcnt--;
 1309         if (la->la_refcnt > 0) {
 1310                 return;
 1311         }
 1312 
 1313         KASSERT(la->la_refcnt == 0, ("refcount not zero"));
 1314         KASSERT(lsc->lsc_active_aggregator != la, ("aggregator active"));
 1315 
 1316         TAILQ_REMOVE(&lsc->lsc_aggregators, la, la_q);
 1317 
 1318         free(la, M_DEVBUF);
 1319 }
 1320 
 1321 /*
 1322  * lacp_aggregator_get: allocate an aggregator.
 1323  */
 1324 
 1325 static struct lacp_aggregator *
 1326 lacp_aggregator_get(struct lacp_softc *lsc, struct lacp_port *lp)
 1327 {
 1328         struct lacp_aggregator *la;
 1329 
 1330         la = malloc(sizeof(*la), M_DEVBUF, M_NOWAIT);
 1331         if (la) {
 1332                 la->la_refcnt = 1;
 1333                 la->la_nports = 0;
 1334                 TAILQ_INIT(&la->la_ports);
 1335                 la->la_pending = 0;
 1336                 TAILQ_INSERT_TAIL(&lsc->lsc_aggregators, la, la_q);
 1337         }
 1338 
 1339         return (la);
 1340 }
 1341 
 1342 /*
 1343  * lacp_fill_aggregator_id: setup a newly allocated aggregator from a port.
 1344  */
 1345 
 1346 static void
 1347 lacp_fill_aggregator_id(struct lacp_aggregator *la, const struct lacp_port *lp)
 1348 {
 1349         lacp_fill_aggregator_id_peer(&la->la_partner, &lp->lp_partner);
 1350         lacp_fill_aggregator_id_peer(&la->la_actor, &lp->lp_actor);
 1351 
 1352         la->la_actor.lip_state = lp->lp_state & LACP_STATE_AGGREGATION;
 1353 }
 1354 
 1355 static void
 1356 lacp_fill_aggregator_id_peer(struct lacp_peerinfo *lpi_aggr,
 1357     const struct lacp_peerinfo *lpi_port)
 1358 {
 1359         memset(lpi_aggr, 0, sizeof(*lpi_aggr));
 1360         lpi_aggr->lip_systemid = lpi_port->lip_systemid;
 1361         lpi_aggr->lip_key = lpi_port->lip_key;
 1362 }
 1363 
 1364 /*
 1365  * lacp_aggregator_is_compatible: check if a port can join to an aggregator.
 1366  */
 1367 
 1368 static int
 1369 lacp_aggregator_is_compatible(const struct lacp_aggregator *la,
 1370     const struct lacp_port *lp)
 1371 {
 1372         if (!(lp->lp_state & LACP_STATE_AGGREGATION) ||
 1373             !(lp->lp_partner.lip_state & LACP_STATE_AGGREGATION)) {
 1374                 return (0);
 1375         }
 1376 
 1377         if (!(la->la_actor.lip_state & LACP_STATE_AGGREGATION)) {
 1378                 return (0);
 1379         }
 1380 
 1381         if (!lacp_peerinfo_is_compatible(&la->la_partner, &lp->lp_partner)) {
 1382                 return (0);
 1383         }
 1384 
 1385         if (!lacp_peerinfo_is_compatible(&la->la_actor, &lp->lp_actor)) {
 1386                 return (0);
 1387         }
 1388 
 1389         return (1);
 1390 }
 1391 
 1392 static int
 1393 lacp_peerinfo_is_compatible(const struct lacp_peerinfo *a,
 1394     const struct lacp_peerinfo *b)
 1395 {
 1396         if (memcmp(&a->lip_systemid, &b->lip_systemid,
 1397             sizeof(a->lip_systemid))) {
 1398                 return (0);
 1399         }
 1400 
 1401         if (memcmp(&a->lip_key, &b->lip_key, sizeof(a->lip_key))) {
 1402                 return (0);
 1403         }
 1404 
 1405         return (1);
 1406 }
 1407 
 1408 static void
 1409 lacp_port_enable(struct lacp_port *lp)
 1410 {
 1411         lp->lp_state |= LACP_STATE_AGGREGATION;
 1412 }
 1413 
 1414 static void
 1415 lacp_port_disable(struct lacp_port *lp)
 1416 {
 1417         lacp_set_mux(lp, LACP_MUX_DETACHED);
 1418 
 1419         lp->lp_state &= ~LACP_STATE_AGGREGATION;
 1420         lp->lp_selected = LACP_UNSELECTED;
 1421         lacp_sm_rx_record_default(lp);
 1422         lp->lp_partner.lip_state &= ~LACP_STATE_AGGREGATION;
 1423         lp->lp_state &= ~LACP_STATE_EXPIRED;
 1424 }
 1425 
 1426 /*
 1427  * lacp_select: select an aggregator.  create one if necessary.
 1428  */
 1429 static void
 1430 lacp_select(struct lacp_port *lp)
 1431 {
 1432         struct lacp_softc *lsc = lp->lp_lsc;
 1433         struct lacp_aggregator *la;
 1434         char buf[LACP_LAGIDSTR_MAX+1];
 1435 
 1436         if (lp->lp_aggregator) {
 1437                 return;
 1438         }
 1439 
 1440         /* If we haven't heard from our peer, skip this step. */
 1441         if (lp->lp_state & LACP_STATE_DEFAULTED)
 1442                 return;
 1443 
 1444         KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
 1445             ("timer_wait_while still active"));
 1446 
 1447         LACP_DPRINTF((lp, "port lagid=%s\n",
 1448             lacp_format_lagid(&lp->lp_actor, &lp->lp_partner,
 1449             buf, sizeof(buf))));
 1450 
 1451         TAILQ_FOREACH(la, &lsc->lsc_aggregators, la_q) {
 1452                 if (lacp_aggregator_is_compatible(la, lp)) {
 1453                         break;
 1454                 }
 1455         }
 1456 
 1457         if (la == NULL) {
 1458                 la = lacp_aggregator_get(lsc, lp);
 1459                 if (la == NULL) {
 1460                         LACP_DPRINTF((lp, "aggregator creation failed\n"));
 1461 
 1462                         /*
 1463                          * will retry on the next tick.
 1464                          */
 1465 
 1466                         return;
 1467                 }
 1468                 lacp_fill_aggregator_id(la, lp);
 1469                 LACP_DPRINTF((lp, "aggregator created\n"));
 1470         } else {
 1471                 LACP_DPRINTF((lp, "compatible aggregator found\n"));
 1472                 if (la->la_refcnt == LACP_MAX_PORTS)
 1473                         return;
 1474                 lacp_aggregator_addref(lsc, la);
 1475         }
 1476 
 1477         LACP_DPRINTF((lp, "aggregator lagid=%s\n",
 1478             lacp_format_lagid(&la->la_actor, &la->la_partner,
 1479             buf, sizeof(buf))));
 1480 
 1481         lp->lp_aggregator = la;
 1482         lp->lp_selected = LACP_SELECTED;
 1483 }
 1484 
 1485 /*
 1486  * lacp_unselect: finish unselect/detach process.
 1487  */
 1488 
 1489 static void
 1490 lacp_unselect(struct lacp_port *lp)
 1491 {
 1492         struct lacp_softc *lsc = lp->lp_lsc;
 1493         struct lacp_aggregator *la = lp->lp_aggregator;
 1494 
 1495         KASSERT(!LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
 1496             ("timer_wait_while still active"));
 1497 
 1498         if (la == NULL) {
 1499                 return;
 1500         }
 1501 
 1502         lp->lp_aggregator = NULL;
 1503         lacp_aggregator_delref(lsc, la);
 1504 }
 1505 
 1506 /* mux machine */
 1507 
 1508 static void
 1509 lacp_sm_mux(struct lacp_port *lp)
 1510 {
 1511         struct lagg_port *lgp = lp->lp_lagg;
 1512         struct lagg_softc *sc = lgp->lp_softc;
 1513         enum lacp_mux_state new_state;
 1514         boolean_t p_sync =
 1515                     (lp->lp_partner.lip_state & LACP_STATE_SYNC) != 0;
 1516         boolean_t p_collecting =
 1517             (lp->lp_partner.lip_state & LACP_STATE_COLLECTING) != 0;
 1518         enum lacp_selected selected = lp->lp_selected;
 1519         struct lacp_aggregator *la;
 1520 
 1521         if (V_lacp_debug > 1)
 1522                 lacp_dprintf(lp, "%s: state= 0x%x, selected= 0x%x, "
 1523                     "p_sync= 0x%x, p_collecting= 0x%x\n", __func__,
 1524                     lp->lp_mux_state, selected, p_sync, p_collecting);
 1525 
 1526 re_eval:
 1527         la = lp->lp_aggregator;
 1528         KASSERT(lp->lp_mux_state == LACP_MUX_DETACHED || la != NULL,
 1529             ("MUX not detached"));
 1530         new_state = lp->lp_mux_state;
 1531         switch (lp->lp_mux_state) {
 1532         case LACP_MUX_DETACHED:
 1533                 if (selected != LACP_UNSELECTED) {
 1534                         new_state = LACP_MUX_WAITING;
 1535                 }
 1536                 break;
 1537         case LACP_MUX_WAITING:
 1538                 KASSERT(la->la_pending > 0 ||
 1539                     !LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE),
 1540                     ("timer_wait_while still active"));
 1541                 if (selected == LACP_SELECTED && la->la_pending == 0) {
 1542                         new_state = LACP_MUX_ATTACHED;
 1543                 } else if (selected == LACP_UNSELECTED) {
 1544                         new_state = LACP_MUX_DETACHED;
 1545                 }
 1546                 break;
 1547         case LACP_MUX_ATTACHED:
 1548                 if (selected == LACP_SELECTED && p_sync) {
 1549                         new_state = LACP_MUX_COLLECTING;
 1550                 } else if (selected != LACP_SELECTED) {
 1551                         new_state = LACP_MUX_DETACHED;
 1552                 }
 1553                 break;
 1554         case LACP_MUX_COLLECTING:
 1555                 if (selected == LACP_SELECTED && p_sync && p_collecting) {
 1556                         new_state = LACP_MUX_DISTRIBUTING;
 1557                 } else if (selected != LACP_SELECTED || !p_sync) {
 1558                         new_state = LACP_MUX_ATTACHED;
 1559                 }
 1560                 break;
 1561         case LACP_MUX_DISTRIBUTING:
 1562                 if (selected != LACP_SELECTED || !p_sync || !p_collecting) {
 1563                         new_state = LACP_MUX_COLLECTING;
 1564                         lacp_dprintf(lp, "Interface stopped DISTRIBUTING, possible flapping\n");
 1565                         sc->sc_flapping++;
 1566                 }
 1567                 break;
 1568         default:
 1569                 panic("%s: unknown state", __func__);
 1570         }
 1571 
 1572         if (lp->lp_mux_state == new_state) {
 1573                 return;
 1574         }
 1575 
 1576         lacp_set_mux(lp, new_state);
 1577         goto re_eval;
 1578 }
 1579 
 1580 static void
 1581 lacp_set_mux(struct lacp_port *lp, enum lacp_mux_state new_state)
 1582 {
 1583         struct lacp_aggregator *la = lp->lp_aggregator;
 1584 
 1585         if (lp->lp_mux_state == new_state) {
 1586                 return;
 1587         }
 1588 
 1589         switch (new_state) {
 1590         case LACP_MUX_DETACHED:
 1591                 lp->lp_state &= ~LACP_STATE_SYNC;
 1592                 lacp_disable_distributing(lp);
 1593                 lacp_disable_collecting(lp);
 1594                 lacp_sm_assert_ntt(lp);
 1595                 /* cancel timer */
 1596                 if (LACP_TIMER_ISARMED(lp, LACP_TIMER_WAIT_WHILE)) {
 1597                         KASSERT(la->la_pending > 0,
 1598                             ("timer_wait_while not active"));
 1599                         la->la_pending--;
 1600                 }
 1601                 LACP_TIMER_DISARM(lp, LACP_TIMER_WAIT_WHILE);
 1602                 lacp_unselect(lp);
 1603                 break;
 1604         case LACP_MUX_WAITING:
 1605                 LACP_TIMER_ARM(lp, LACP_TIMER_WAIT_WHILE,
 1606                     LACP_AGGREGATE_WAIT_TIME);
 1607                 la->la_pending++;
 1608                 break;
 1609         case LACP_MUX_ATTACHED:
 1610                 lp->lp_state |= LACP_STATE_SYNC;
 1611                 lacp_disable_collecting(lp);
 1612                 lacp_sm_assert_ntt(lp);
 1613                 break;
 1614         case LACP_MUX_COLLECTING:
 1615                 lacp_enable_collecting(lp);
 1616                 lacp_disable_distributing(lp);
 1617                 lacp_sm_assert_ntt(lp);
 1618                 break;
 1619         case LACP_MUX_DISTRIBUTING:
 1620                 lacp_enable_distributing(lp);
 1621                 break;
 1622         default:
 1623                 panic("%s: unknown state", __func__);
 1624         }
 1625 
 1626         LACP_DPRINTF((lp, "mux_state %d -> %d\n", lp->lp_mux_state, new_state));
 1627 
 1628         lp->lp_mux_state = new_state;
 1629 }
 1630 
 1631 static void
 1632 lacp_sm_mux_timer(struct lacp_port *lp)
 1633 {
 1634         struct lacp_aggregator *la = lp->lp_aggregator;
 1635         char buf[LACP_LAGIDSTR_MAX+1];
 1636 
 1637         KASSERT(la->la_pending > 0, ("no pending event"));
 1638 
 1639         LACP_DPRINTF((lp, "%s: aggregator %s, pending %d -> %d\n", __func__,
 1640             lacp_format_lagid(&la->la_actor, &la->la_partner,
 1641             buf, sizeof(buf)),
 1642             la->la_pending, la->la_pending - 1));
 1643 
 1644         la->la_pending--;
 1645 }
 1646 
 1647 /* periodic transmit machine */
 1648 
 1649 static void
 1650 lacp_sm_ptx_update_timeout(struct lacp_port *lp, uint8_t oldpstate)
 1651 {
 1652         if (LACP_STATE_EQ(oldpstate, lp->lp_partner.lip_state,
 1653             LACP_STATE_TIMEOUT)) {
 1654                 return;
 1655         }
 1656 
 1657         LACP_DPRINTF((lp, "partner timeout changed\n"));
 1658 
 1659         /*
 1660          * FAST_PERIODIC -> SLOW_PERIODIC
 1661          * or
 1662          * SLOW_PERIODIC (-> PERIODIC_TX) -> FAST_PERIODIC
 1663          *
 1664          * let lacp_sm_ptx_tx_schedule to update timeout.
 1665          */
 1666 
 1667         LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
 1668 
 1669         /*
 1670          * if timeout has been shortened, assert NTT.
 1671          */
 1672 
 1673         if ((lp->lp_partner.lip_state & LACP_STATE_TIMEOUT)) {
 1674                 lacp_sm_assert_ntt(lp);
 1675         }
 1676 }
 1677 
 1678 static void
 1679 lacp_sm_ptx_tx_schedule(struct lacp_port *lp)
 1680 {
 1681         int timeout;
 1682 
 1683         if (!(lp->lp_state & LACP_STATE_ACTIVITY) &&
 1684             !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY)) {
 1685                 /*
 1686                  * NO_PERIODIC
 1687                  */
 1688 
 1689                 LACP_TIMER_DISARM(lp, LACP_TIMER_PERIODIC);
 1690                 return;
 1691         }
 1692 
 1693         if (LACP_TIMER_ISARMED(lp, LACP_TIMER_PERIODIC)) {
 1694                 return;
 1695         }
 1696 
 1697         timeout = (lp->lp_partner.lip_state & LACP_STATE_TIMEOUT) ?
 1698             LACP_FAST_PERIODIC_TIME : LACP_SLOW_PERIODIC_TIME;
 1699 
 1700         LACP_TIMER_ARM(lp, LACP_TIMER_PERIODIC, timeout);
 1701 }
 1702 
 1703 static void
 1704 lacp_sm_ptx_timer(struct lacp_port *lp)
 1705 {
 1706         lacp_sm_assert_ntt(lp);
 1707 }
 1708 
 1709 static void
 1710 lacp_sm_rx(struct lacp_port *lp, const struct lacpdu *du)
 1711 {
 1712         int timeout;
 1713 
 1714         /*
 1715          * check LACP_DISABLED first
 1716          */
 1717 
 1718         if (!(lp->lp_state & LACP_STATE_AGGREGATION)) {
 1719                 return;
 1720         }
 1721 
 1722         /*
 1723          * check loopback condition.
 1724          */
 1725 
 1726         if (!lacp_compare_systemid(&du->ldu_actor.lip_systemid,
 1727             &lp->lp_actor.lip_systemid)) {
 1728                 return;
 1729         }
 1730 
 1731         /*
 1732          * EXPIRED, DEFAULTED, CURRENT -> CURRENT
 1733          */
 1734 
 1735         microuptime(&lp->lp_last_lacpdu_rx);
 1736         lacp_sm_rx_update_selected(lp, du);
 1737         lacp_sm_rx_update_ntt(lp, du);
 1738         lacp_sm_rx_record_pdu(lp, du);
 1739 
 1740         timeout = (lp->lp_state & LACP_STATE_TIMEOUT) ?
 1741             LACP_SHORT_TIMEOUT_TIME : LACP_LONG_TIMEOUT_TIME;
 1742         LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, timeout);
 1743 
 1744         lp->lp_state &= ~LACP_STATE_EXPIRED;
 1745 
 1746         /*
 1747          * kick transmit machine without waiting the next tick.
 1748          */
 1749 
 1750         lacp_sm_tx(lp);
 1751 }
 1752 
 1753 static void
 1754 lacp_sm_rx_set_expired(struct lacp_port *lp)
 1755 {
 1756         lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
 1757         lp->lp_partner.lip_state |= LACP_STATE_TIMEOUT;
 1758         LACP_TIMER_ARM(lp, LACP_TIMER_CURRENT_WHILE, LACP_SHORT_TIMEOUT_TIME);
 1759         lp->lp_state |= LACP_STATE_EXPIRED;
 1760 }
 1761 
 1762 static void
 1763 lacp_sm_rx_timer(struct lacp_port *lp)
 1764 {
 1765         if ((lp->lp_state & LACP_STATE_EXPIRED) == 0) {
 1766                 /* CURRENT -> EXPIRED */
 1767                 LACP_DPRINTF((lp, "%s: CURRENT -> EXPIRED\n", __func__));
 1768                 lacp_sm_rx_set_expired(lp);
 1769         } else {
 1770                 /* EXPIRED -> DEFAULTED */
 1771                 LACP_DPRINTF((lp, "%s: EXPIRED -> DEFAULTED\n", __func__));
 1772                 lacp_sm_rx_update_default_selected(lp);
 1773                 lacp_sm_rx_record_default(lp);
 1774                 lp->lp_state &= ~LACP_STATE_EXPIRED;
 1775         }
 1776 }
 1777 
 1778 static void
 1779 lacp_sm_rx_record_pdu(struct lacp_port *lp, const struct lacpdu *du)
 1780 {
 1781         boolean_t active;
 1782         uint8_t oldpstate;
 1783         char buf[LACP_STATESTR_MAX+1];
 1784 
 1785         LACP_TRACE(lp);
 1786 
 1787         oldpstate = lp->lp_partner.lip_state;
 1788 
 1789         active = (du->ldu_actor.lip_state & LACP_STATE_ACTIVITY)
 1790             || ((lp->lp_state & LACP_STATE_ACTIVITY) &&
 1791             (du->ldu_partner.lip_state & LACP_STATE_ACTIVITY));
 1792 
 1793         lp->lp_partner = du->ldu_actor;
 1794         if (active &&
 1795             ((LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
 1796             LACP_STATE_AGGREGATION) &&
 1797             !lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner))
 1798             || (du->ldu_partner.lip_state & LACP_STATE_AGGREGATION) == 0)) {
 1799                 /*
 1800                  * XXX Maintain legacy behavior of leaving the
 1801                  * LACP_STATE_SYNC bit unchanged from the partner's
 1802                  * advertisement if lsc_strict_mode is false.
 1803                  * TODO: We should re-examine the concept of the "strict mode"
 1804                  * to ensure it makes sense to maintain a non-strict mode.
 1805                  */
 1806                 if (lp->lp_lsc->lsc_strict_mode)
 1807                         lp->lp_partner.lip_state |= LACP_STATE_SYNC;
 1808         } else {
 1809                 lp->lp_partner.lip_state &= ~LACP_STATE_SYNC;
 1810         }
 1811 
 1812         lp->lp_state &= ~LACP_STATE_DEFAULTED;
 1813 
 1814         if (oldpstate != lp->lp_partner.lip_state) {
 1815                 LACP_DPRINTF((lp, "old pstate %s\n",
 1816                     lacp_format_state(oldpstate, buf, sizeof(buf))));
 1817                 LACP_DPRINTF((lp, "new pstate %s\n",
 1818                     lacp_format_state(lp->lp_partner.lip_state, buf,
 1819                     sizeof(buf))));
 1820         }
 1821 
 1822         lacp_sm_ptx_update_timeout(lp, oldpstate);
 1823 }
 1824 
 1825 static void
 1826 lacp_sm_rx_update_ntt(struct lacp_port *lp, const struct lacpdu *du)
 1827 {
 1828 
 1829         LACP_TRACE(lp);
 1830 
 1831         if (lacp_compare_peerinfo(&lp->lp_actor, &du->ldu_partner) ||
 1832             !LACP_STATE_EQ(lp->lp_state, du->ldu_partner.lip_state,
 1833             LACP_STATE_ACTIVITY | LACP_STATE_SYNC | LACP_STATE_AGGREGATION)) {
 1834                 LACP_DPRINTF((lp, "%s: assert ntt\n", __func__));
 1835                 lacp_sm_assert_ntt(lp);
 1836         }
 1837 }
 1838 
 1839 static void
 1840 lacp_sm_rx_record_default(struct lacp_port *lp)
 1841 {
 1842         uint8_t oldpstate;
 1843 
 1844         LACP_TRACE(lp);
 1845 
 1846         oldpstate = lp->lp_partner.lip_state;
 1847         if (lp->lp_lsc->lsc_strict_mode)
 1848                 lp->lp_partner = lacp_partner_admin_strict;
 1849         else
 1850                 lp->lp_partner = lacp_partner_admin_optimistic;
 1851         lp->lp_state |= LACP_STATE_DEFAULTED;
 1852         lacp_sm_ptx_update_timeout(lp, oldpstate);
 1853 }
 1854 
 1855 static void
 1856 lacp_sm_rx_update_selected_from_peerinfo(struct lacp_port *lp,
 1857     const struct lacp_peerinfo *info)
 1858 {
 1859 
 1860         LACP_TRACE(lp);
 1861 
 1862         if (lacp_compare_peerinfo(&lp->lp_partner, info) ||
 1863             !LACP_STATE_EQ(lp->lp_partner.lip_state, info->lip_state,
 1864             LACP_STATE_AGGREGATION)) {
 1865                 lp->lp_selected = LACP_UNSELECTED;
 1866                 /* mux machine will clean up lp->lp_aggregator */
 1867         }
 1868 }
 1869 
 1870 static void
 1871 lacp_sm_rx_update_selected(struct lacp_port *lp, const struct lacpdu *du)
 1872 {
 1873 
 1874         LACP_TRACE(lp);
 1875 
 1876         lacp_sm_rx_update_selected_from_peerinfo(lp, &du->ldu_actor);
 1877 }
 1878 
 1879 static void
 1880 lacp_sm_rx_update_default_selected(struct lacp_port *lp)
 1881 {
 1882 
 1883         LACP_TRACE(lp);
 1884 
 1885         if (lp->lp_lsc->lsc_strict_mode)
 1886                 lacp_sm_rx_update_selected_from_peerinfo(lp,
 1887                     &lacp_partner_admin_strict);
 1888         else
 1889                 lacp_sm_rx_update_selected_from_peerinfo(lp,
 1890                     &lacp_partner_admin_optimistic);
 1891 }
 1892 
 1893 /* transmit machine */
 1894 
 1895 static void
 1896 lacp_sm_tx(struct lacp_port *lp)
 1897 {
 1898         int error = 0;
 1899 
 1900         if (!(lp->lp_state & LACP_STATE_AGGREGATION)
 1901 #if 1
 1902             || (!(lp->lp_state & LACP_STATE_ACTIVITY)
 1903             && !(lp->lp_partner.lip_state & LACP_STATE_ACTIVITY))
 1904 #endif
 1905             ) {
 1906                 lp->lp_flags &= ~LACP_PORT_NTT;
 1907         }
 1908 
 1909         if (!(lp->lp_flags & LACP_PORT_NTT)) {
 1910                 return;
 1911         }
 1912 
 1913         /* Rate limit to 3 PDUs per LACP_FAST_PERIODIC_TIME */
 1914         if (ppsratecheck(&lp->lp_last_lacpdu, &lp->lp_lacpdu_sent,
 1915                     (3 / LACP_FAST_PERIODIC_TIME)) == 0) {
 1916                 LACP_DPRINTF((lp, "rate limited pdu\n"));
 1917                 return;
 1918         }
 1919 
 1920         if (((1 << lp->lp_ifp->if_dunit) & lp->lp_lsc->lsc_debug.lsc_tx_test) == 0) {
 1921                 error = lacp_xmit_lacpdu(lp);
 1922         } else {
 1923                 LACP_TPRINTF((lp, "Dropping TX PDU\n"));
 1924         }
 1925 
 1926         if (error == 0) {
 1927                 lp->lp_flags &= ~LACP_PORT_NTT;
 1928         } else {
 1929                 LACP_DPRINTF((lp, "lacpdu transmit failure, error %d\n",
 1930                     error));
 1931         }
 1932 }
 1933 
 1934 static void
 1935 lacp_sm_assert_ntt(struct lacp_port *lp)
 1936 {
 1937 
 1938         lp->lp_flags |= LACP_PORT_NTT;
 1939 }
 1940 
 1941 static void
 1942 lacp_run_timers(struct lacp_port *lp)
 1943 {
 1944         int i;
 1945         struct timeval time_diff;
 1946 
 1947         for (i = 0; i < LACP_NTIMER; i++) {
 1948                 KASSERT(lp->lp_timer[i] >= 0,
 1949                     ("invalid timer value %d", lp->lp_timer[i]));
 1950                 if (lp->lp_timer[i] == 0) {
 1951                         continue;
 1952                 } else {
 1953                         if (i == LACP_TIMER_CURRENT_WHILE) {
 1954                                 microuptime(&time_diff);
 1955                                 timevalsub(&time_diff, &lp->lp_last_lacpdu_rx);
 1956                                 if (time_diff.tv_sec) {
 1957                                         /* At least one sec has elapsed since last LACP packet. */
 1958                                         --lp->lp_timer[i];
 1959                                 }
 1960                         } else {
 1961                                 --lp->lp_timer[i];
 1962                         }
 1963 
 1964                         if ((lp->lp_timer[i] <= 0) && (lacp_timer_funcs[i])) {
 1965                                 (*lacp_timer_funcs[i])(lp);
 1966                         }
 1967                 }
 1968         }
 1969 }
 1970 
 1971 int
 1972 lacp_marker_input(struct lacp_port *lp, struct mbuf *m)
 1973 {
 1974         struct lacp_softc *lsc = lp->lp_lsc;
 1975         struct lagg_port *lgp = lp->lp_lagg;
 1976         struct lacp_port *lp2;
 1977         struct markerdu *mdu;
 1978         int error = 0;
 1979         int pending = 0;
 1980 
 1981         if (m->m_pkthdr.len != sizeof(*mdu)) {
 1982                 goto bad;
 1983         }
 1984 
 1985         if ((m->m_flags & M_MCAST) == 0) {
 1986                 goto bad;
 1987         }
 1988 
 1989         if (m->m_len < sizeof(*mdu)) {
 1990                 m = m_pullup(m, sizeof(*mdu));
 1991                 if (m == NULL) {
 1992                         return (ENOMEM);
 1993                 }
 1994         }
 1995 
 1996         mdu = mtod(m, struct markerdu *);
 1997 
 1998         if (memcmp(&mdu->mdu_eh.ether_dhost,
 1999             &ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN)) {
 2000                 goto bad;
 2001         }
 2002 
 2003         if (mdu->mdu_sph.sph_version != 1) {
 2004                 goto bad;
 2005         }
 2006 
 2007         switch (mdu->mdu_tlv.tlv_type) {
 2008         case MARKER_TYPE_INFO:
 2009                 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
 2010                     marker_info_tlv_template, TRUE)) {
 2011                         goto bad;
 2012                 }
 2013                 mdu->mdu_tlv.tlv_type = MARKER_TYPE_RESPONSE;
 2014                 memcpy(&mdu->mdu_eh.ether_dhost,
 2015                     &ethermulticastaddr_slowprotocols, ETHER_ADDR_LEN);
 2016                 memcpy(&mdu->mdu_eh.ether_shost,
 2017                     lgp->lp_lladdr, ETHER_ADDR_LEN);
 2018                 error = lagg_enqueue(lp->lp_ifp, m);
 2019                 break;
 2020 
 2021         case MARKER_TYPE_RESPONSE:
 2022                 if (tlv_check(mdu, sizeof(*mdu), &mdu->mdu_tlv,
 2023                     marker_response_tlv_template, TRUE)) {
 2024                         goto bad;
 2025                 }
 2026                 LACP_DPRINTF((lp, "marker response, port=%u, sys=%6D, id=%u\n",
 2027                     ntohs(mdu->mdu_info.mi_rq_port), mdu->mdu_info.mi_rq_system,
 2028                     ":", ntohl(mdu->mdu_info.mi_rq_xid)));
 2029 
 2030                 /* Verify that it is the last marker we sent out */
 2031                 if (memcmp(&mdu->mdu_info, &lp->lp_marker,
 2032                     sizeof(struct lacp_markerinfo)))
 2033                         goto bad;
 2034 
 2035                 LACP_LOCK(lsc);
 2036                 lp->lp_flags &= ~LACP_PORT_MARK;
 2037 
 2038                 if (lsc->lsc_suppress_distributing) {
 2039                         /* Check if any ports are waiting for a response */
 2040                         LIST_FOREACH(lp2, &lsc->lsc_ports, lp_next) {
 2041                                 if (lp2->lp_flags & LACP_PORT_MARK) {
 2042                                         pending = 1;
 2043                                         break;
 2044                                 }
 2045                         }
 2046 
 2047                         if (pending == 0) {
 2048                                 /* All interface queues are clear */
 2049                                 LACP_DPRINTF((NULL, "queue flush complete\n"));
 2050                                 lsc->lsc_suppress_distributing = FALSE;
 2051                         }
 2052                 }
 2053                 LACP_UNLOCK(lsc);
 2054                 m_freem(m);
 2055                 break;
 2056 
 2057         default:
 2058                 goto bad;
 2059         }
 2060 
 2061         return (error);
 2062 
 2063 bad:
 2064         LACP_DPRINTF((lp, "bad marker frame\n"));
 2065         m_freem(m);
 2066         return (EINVAL);
 2067 }
 2068 
 2069 static int
 2070 tlv_check(const void *p, size_t size, const struct tlvhdr *tlv,
 2071     const struct tlv_template *tmpl, boolean_t check_type)
 2072 {
 2073         while (/* CONSTCOND */ 1) {
 2074                 if ((const char *)tlv - (const char *)p + sizeof(*tlv) > size) {
 2075                         return (EINVAL);
 2076                 }
 2077                 if ((check_type && tlv->tlv_type != tmpl->tmpl_type) ||
 2078                     tlv->tlv_length != tmpl->tmpl_length) {
 2079                         return (EINVAL);
 2080                 }
 2081                 if (tmpl->tmpl_type == 0) {
 2082                         break;
 2083                 }
 2084                 tlv = (const struct tlvhdr *)
 2085                     ((const char *)tlv + tlv->tlv_length);
 2086                 tmpl++;
 2087         }
 2088 
 2089         return (0);
 2090 }
 2091 
 2092 /* Debugging */
 2093 const char *
 2094 lacp_format_mac(const uint8_t *mac, char *buf, size_t buflen)
 2095 {
 2096         snprintf(buf, buflen, "%02X-%02X-%02X-%02X-%02X-%02X",
 2097             (int)mac[0],
 2098             (int)mac[1],
 2099             (int)mac[2],
 2100             (int)mac[3],
 2101             (int)mac[4],
 2102             (int)mac[5]);
 2103 
 2104         return (buf);
 2105 }
 2106 
 2107 const char *
 2108 lacp_format_systemid(const struct lacp_systemid *sysid,
 2109     char *buf, size_t buflen)
 2110 {
 2111         char macbuf[LACP_MACSTR_MAX+1];
 2112 
 2113         snprintf(buf, buflen, "%04X,%s",
 2114             ntohs(sysid->lsi_prio),
 2115             lacp_format_mac(sysid->lsi_mac, macbuf, sizeof(macbuf)));
 2116 
 2117         return (buf);
 2118 }
 2119 
 2120 const char *
 2121 lacp_format_portid(const struct lacp_portid *portid, char *buf, size_t buflen)
 2122 {
 2123         snprintf(buf, buflen, "%04X,%04X",
 2124             ntohs(portid->lpi_prio),
 2125             ntohs(portid->lpi_portno));
 2126 
 2127         return (buf);
 2128 }
 2129 
 2130 const char *
 2131 lacp_format_partner(const struct lacp_peerinfo *peer, char *buf, size_t buflen)
 2132 {
 2133         char sysid[LACP_SYSTEMIDSTR_MAX+1];
 2134         char portid[LACP_PORTIDSTR_MAX+1];
 2135 
 2136         snprintf(buf, buflen, "(%s,%04X,%s)",
 2137             lacp_format_systemid(&peer->lip_systemid, sysid, sizeof(sysid)),
 2138             ntohs(peer->lip_key),
 2139             lacp_format_portid(&peer->lip_portid, portid, sizeof(portid)));
 2140 
 2141         return (buf);
 2142 }
 2143 
 2144 const char *
 2145 lacp_format_lagid(const struct lacp_peerinfo *a,
 2146     const struct lacp_peerinfo *b, char *buf, size_t buflen)
 2147 {
 2148         char astr[LACP_PARTNERSTR_MAX+1];
 2149         char bstr[LACP_PARTNERSTR_MAX+1];
 2150 
 2151 #if 0
 2152         /*
 2153          * there's a convention to display small numbered peer
 2154          * in the left.
 2155          */
 2156 
 2157         if (lacp_compare_peerinfo(a, b) > 0) {
 2158                 const struct lacp_peerinfo *t;
 2159 
 2160                 t = a;
 2161                 a = b;
 2162                 b = t;
 2163         }
 2164 #endif
 2165 
 2166         snprintf(buf, buflen, "[%s,%s]",
 2167             lacp_format_partner(a, astr, sizeof(astr)),
 2168             lacp_format_partner(b, bstr, sizeof(bstr)));
 2169 
 2170         return (buf);
 2171 }
 2172 
 2173 const char *
 2174 lacp_format_lagid_aggregator(const struct lacp_aggregator *la,
 2175     char *buf, size_t buflen)
 2176 {
 2177         if (la == NULL) {
 2178                 return ("(none)");
 2179         }
 2180 
 2181         return (lacp_format_lagid(&la->la_actor, &la->la_partner, buf, buflen));
 2182 }
 2183 
 2184 const char *
 2185 lacp_format_state(uint8_t state, char *buf, size_t buflen)
 2186 {
 2187         snprintf(buf, buflen, "%b", state, LACP_STATE_BITS);
 2188         return (buf);
 2189 }
 2190 
 2191 static void
 2192 lacp_dump_lacpdu(const struct lacpdu *du)
 2193 {
 2194         char buf[LACP_PARTNERSTR_MAX+1];
 2195         char buf2[LACP_STATESTR_MAX+1];
 2196 
 2197         printf("actor=%s\n",
 2198             lacp_format_partner(&du->ldu_actor, buf, sizeof(buf)));
 2199         printf("actor.state=%s\n",
 2200             lacp_format_state(du->ldu_actor.lip_state, buf2, sizeof(buf2)));
 2201         printf("partner=%s\n",
 2202             lacp_format_partner(&du->ldu_partner, buf, sizeof(buf)));
 2203         printf("partner.state=%s\n",
 2204             lacp_format_state(du->ldu_partner.lip_state, buf2, sizeof(buf2)));
 2205 
 2206         printf("maxdelay=%d\n", ntohs(du->ldu_collector.lci_maxdelay));
 2207 }
 2208 
 2209 static void
 2210 lacp_dprintf(const struct lacp_port *lp, const char *fmt, ...)
 2211 {
 2212         va_list va;
 2213 
 2214         if (lp) {
 2215                 printf("%s: ", lp->lp_ifp->if_xname);
 2216         }
 2217 
 2218         va_start(va, fmt);
 2219         vprintf(fmt, va);
 2220         va_end(va);
 2221 }
Cache object: dc1bd725c2387606df3d872f770667ec
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FreeBSD/Linux Kernel Cross Reference sys/net/ieee8023ad_lacp.c

FreeBSD/Linux Kernel Cross Reference
sys/net/ieee8023ad_lacp.c
