The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: ieee8023ad_impl.h,v 1.2 2005/12/10 23:21:39 elad Exp $ */
    2 
    3 /*-
    4  * Copyright (c)2005 YAMAMOTO Takashi,
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * $FreeBSD$
   29  */
   30 
   31 /*
   32  * IEEE802.3ad LACP
   33  *
   34  * implementation details.
   35  */
   36 
   37 #define LACP_TIMER_CURRENT_WHILE        0
   38 #define LACP_TIMER_PERIODIC             1
   39 #define LACP_TIMER_WAIT_WHILE           2
   40 #define LACP_NTIMER                     3
   41 
   42 #define LACP_TIMER_ARM(port, timer, val) \
   43         (port)->lp_timer[(timer)] = (val)
   44 #define LACP_TIMER_DISARM(port, timer) \
   45         (port)->lp_timer[(timer)] = 0
   46 #define LACP_TIMER_ISARMED(port, timer) \
   47         ((port)->lp_timer[(timer)] > 0)
   48 
   49 /*
   50  * IEEE802.3ad LACP
   51  *
   52  * protocol definitions.
   53  */
   54 
   55 #define LACP_STATE_ACTIVITY     (1<<0)
   56 #define LACP_STATE_TIMEOUT      (1<<1)
   57 #define LACP_STATE_AGGREGATION  (1<<2)
   58 #define LACP_STATE_SYNC         (1<<3)
   59 #define LACP_STATE_COLLECTING   (1<<4)
   60 #define LACP_STATE_DISTRIBUTING (1<<5)
   61 #define LACP_STATE_DEFAULTED    (1<<6)
   62 #define LACP_STATE_EXPIRED      (1<<7)
   63 
   64 #define LACP_PORT_NTT           0x00000001
   65 #define LACP_PORT_MARK          0x00000002
   66 
   67 #define LACP_STATE_BITS         \
   68         "\020"                  \
   69         "\001ACTIVITY"          \
   70         "\002TIMEOUT"           \
   71         "\003AGGREGATION"       \
   72         "\004SYNC"              \
   73         "\005COLLECTING"        \
   74         "\006DISTRIBUTING"      \
   75         "\007DEFAULTED"         \
   76         "\010EXPIRED"
   77 
   78 /*
   79  * IEEE802.3 slow protocols
   80  *
   81  * protocol (on-wire) definitions.
   82  *
   83  * XXX should be elsewhere.
   84  */
   85 
   86 #define SLOWPROTOCOLS_SUBTYPE_LACP      1
   87 #define SLOWPROTOCOLS_SUBTYPE_MARKER    2
   88 
   89 struct slowprothdr {
   90         uint8_t         sph_subtype;
   91         uint8_t         sph_version;
   92 } __packed;
   93 
   94 /*
   95  * TLV on-wire structure.
   96  */
   97 
   98 struct tlvhdr {
   99         uint8_t         tlv_type;
  100         uint8_t         tlv_length;
  101         /* uint8_t tlv_value[]; */
  102 } __packed;
  103 
  104 /*
  105  * ... and our implementation.
  106  */
  107 
  108 #define TLV_SET(tlv, type, length) \
  109         do { \
  110                 (tlv)->tlv_type = (type); \
  111                 (tlv)->tlv_length = sizeof(*tlv) + (length); \
  112         } while (/*CONSTCOND*/0)
  113 
  114 struct tlv_template {
  115         uint8_t                 tmpl_type;
  116         uint8_t                 tmpl_length;
  117 };
  118 
  119 struct lacp_systemid {
  120         uint16_t                lsi_prio;
  121         uint8_t                 lsi_mac[6];
  122 } __packed;
  123 
  124 struct lacp_portid {
  125         uint16_t                lpi_prio;
  126         uint16_t                lpi_portno;
  127 } __packed;
  128 
  129 struct lacp_peerinfo {
  130         struct lacp_systemid    lip_systemid;
  131         uint16_t                lip_key;
  132         struct lacp_portid      lip_portid;
  133         uint8_t                 lip_state;
  134         uint8_t                 lip_resv[3];
  135 } __packed;
  136 
  137 struct lacp_collectorinfo {
  138         uint16_t                lci_maxdelay;
  139         uint8_t                 lci_resv[12];
  140 } __packed;
  141 
  142 struct lacpdu {
  143         struct ether_header     ldu_eh;
  144         struct slowprothdr      ldu_sph;
  145 
  146         struct tlvhdr           ldu_tlv_actor;
  147         struct lacp_peerinfo    ldu_actor;
  148         struct tlvhdr           ldu_tlv_partner;
  149         struct lacp_peerinfo    ldu_partner;
  150         struct tlvhdr           ldu_tlv_collector;
  151         struct lacp_collectorinfo ldu_collector;
  152         struct tlvhdr           ldu_tlv_term;
  153         uint8_t                 ldu_resv[50];
  154 } __packed;
  155 
  156 /*
  157  * IEEE802.3ad marker protocol
  158  *
  159  * protocol (on-wire) definitions.
  160  */
  161 struct lacp_markerinfo {
  162         uint16_t                mi_rq_port;
  163         uint8_t                 mi_rq_system[ETHER_ADDR_LEN];
  164         uint32_t                mi_rq_xid;
  165         uint8_t                 mi_pad[2];
  166 } __packed;
  167 
  168 struct markerdu {
  169         struct ether_header     mdu_eh;
  170         struct slowprothdr      mdu_sph;
  171 
  172         struct tlvhdr           mdu_tlv;
  173         struct lacp_markerinfo  mdu_info;
  174         struct tlvhdr           mdu_tlv_term;
  175         uint8_t                 mdu_resv[90];
  176 } __packed;
  177 
  178 #define MARKER_TYPE_INFO        0x01
  179 #define MARKER_TYPE_RESPONSE    0x02
  180 
  181 enum lacp_selected {
  182         LACP_UNSELECTED,
  183         LACP_STANDBY,   /* not used in this implementation */
  184         LACP_SELECTED,
  185 };
  186 
  187 enum lacp_mux_state {
  188         LACP_MUX_DETACHED,
  189         LACP_MUX_WAITING,
  190         LACP_MUX_ATTACHED,
  191         LACP_MUX_COLLECTING,
  192         LACP_MUX_DISTRIBUTING,
  193 };
  194 
  195 #define LACP_MAX_PORTS          32
  196 
  197 struct lacp_portmap {
  198         int                     pm_count;
  199         struct lacp_port        *pm_map[LACP_MAX_PORTS];
  200 };
  201 
  202 struct lacp_port {
  203         TAILQ_ENTRY(lacp_port)  lp_dist_q;
  204         LIST_ENTRY(lacp_port)   lp_next;
  205         struct lacp_softc       *lp_lsc;
  206         struct lagg_port        *lp_lagg;
  207         struct ifnet            *lp_ifp;
  208         struct lacp_peerinfo    lp_partner;
  209         struct lacp_peerinfo    lp_actor;
  210         struct lacp_markerinfo  lp_marker;
  211 #define lp_state        lp_actor.lip_state
  212 #define lp_key          lp_actor.lip_key
  213 #define lp_systemid     lp_actor.lip_systemid
  214         struct timeval          lp_last_lacpdu;
  215         int                     lp_lacpdu_sent;
  216         enum lacp_mux_state     lp_mux_state;
  217         enum lacp_selected      lp_selected;
  218         int                     lp_flags;
  219         u_int                   lp_media; /* XXX redundant */
  220         int                     lp_timer[LACP_NTIMER];
  221         struct ifmultiaddr      *lp_ifma;
  222 
  223         struct lacp_aggregator  *lp_aggregator;
  224 };
  225 
  226 struct lacp_aggregator {
  227         TAILQ_ENTRY(lacp_aggregator)    la_q;
  228         int                     la_refcnt; /* num of ports which selected us */
  229         int                     la_nports; /* num of distributing ports  */
  230         TAILQ_HEAD(, lacp_port) la_ports; /* distributing ports */
  231         struct lacp_peerinfo    la_partner;
  232         struct lacp_peerinfo    la_actor;
  233         int                     la_pending; /* number of ports in wait_while */
  234 };
  235 
  236 struct lacp_softc {
  237         struct lagg_softc       *lsc_softc;
  238         struct mtx              lsc_mtx;
  239         struct lacp_aggregator  *lsc_active_aggregator;
  240         TAILQ_HEAD(, lacp_aggregator) lsc_aggregators;
  241         boolean_t               lsc_suppress_distributing;
  242         struct callout          lsc_transit_callout;
  243         struct callout          lsc_callout;
  244         LIST_HEAD(, lacp_port)  lsc_ports;
  245         struct lacp_portmap     lsc_pmap[2];
  246         volatile u_int          lsc_activemap;
  247         u_int32_t               lsc_hashkey;
  248 };
  249 
  250 #define LACP_TYPE_ACTORINFO     1
  251 #define LACP_TYPE_PARTNERINFO   2
  252 #define LACP_TYPE_COLLECTORINFO 3
  253 
  254 /* timeout values (in sec) */
  255 #define LACP_FAST_PERIODIC_TIME         (1)
  256 #define LACP_SLOW_PERIODIC_TIME         (30)
  257 #define LACP_SHORT_TIMEOUT_TIME         (3 * LACP_FAST_PERIODIC_TIME)
  258 #define LACP_LONG_TIMEOUT_TIME          (3 * LACP_SLOW_PERIODIC_TIME)
  259 #define LACP_CHURN_DETECTION_TIME       (60)
  260 #define LACP_AGGREGATE_WAIT_TIME        (2)
  261 #define LACP_TRANSIT_DELAY              3000    /* in msec */
  262 
  263 #define LACP_STATE_EQ(s1, s2, mask)     \
  264         ((((s1) ^ (s2)) & (mask)) == 0)
  265 
  266 #define LACP_SYS_PRI(peer)      (peer).lip_systemid.lsi_prio
  267 
  268 #define LACP_PORT(_lp)  ((struct lacp_port *)(_lp)->lp_psc)
  269 #define LACP_SOFTC(_sc) ((struct lacp_softc *)(_sc)->sc_psc)
  270 
  271 #define LACP_LOCK_INIT(_lsc)            mtx_init(&(_lsc)->lsc_mtx, \
  272                                             "lacp mtx", NULL, MTX_DEF)
  273 #define LACP_LOCK_DESTROY(_lsc)         mtx_destroy(&(_lsc)->lsc_mtx)
  274 #define LACP_LOCK(_lsc)                 mtx_lock(&(_lsc)->lsc_mtx)
  275 #define LACP_UNLOCK(_lsc)               mtx_unlock(&(_lsc)->lsc_mtx)
  276 #define LACP_LOCK_ASSERT(_lsc)          mtx_assert(&(_lsc)->lsc_mtx, MA_OWNED)
  277 
  278 struct mbuf     *lacp_input(struct lagg_port *, struct mbuf *);
  279 struct lagg_port *lacp_select_tx_port(struct lagg_softc *, struct mbuf *);
  280 int             lacp_attach(struct lagg_softc *);
  281 int             lacp_detach(struct lagg_softc *);
  282 void            lacp_init(struct lagg_softc *);
  283 void            lacp_stop(struct lagg_softc *);
  284 int             lacp_port_create(struct lagg_port *);
  285 void            lacp_port_destroy(struct lagg_port *);
  286 void            lacp_linkstate(struct lagg_port *);
  287 void            lacp_req(struct lagg_softc *, caddr_t);
  288 void            lacp_portreq(struct lagg_port *, caddr_t);
  289 
  290 static __inline int
  291 lacp_isactive(struct lagg_port *lgp)
  292 {
  293         struct lacp_port *lp = LACP_PORT(lgp);
  294         struct lacp_softc *lsc = lp->lp_lsc;
  295         struct lacp_aggregator *la = lp->lp_aggregator;
  296 
  297         /* This port is joined to the active aggregator */
  298         if (la != NULL && la == lsc->lsc_active_aggregator)
  299                 return (1);
  300 
  301         return (0);
  302 }
  303 
  304 static __inline int
  305 lacp_iscollecting(struct lagg_port *lgp)
  306 {
  307         struct lacp_port *lp = LACP_PORT(lgp);
  308 
  309         return ((lp->lp_state & LACP_STATE_COLLECTING) != 0);
  310 }
  311 
  312 static __inline int
  313 lacp_isdistributing(struct lagg_port *lgp)
  314 {
  315         struct lacp_port *lp = LACP_PORT(lgp);
  316 
  317         return ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0);
  318 }
  319 
  320 /* following constants don't include terminating NUL */
  321 #define LACP_MACSTR_MAX         (2*6 + 5)
  322 #define LACP_SYSTEMPRIOSTR_MAX  (4)
  323 #define LACP_SYSTEMIDSTR_MAX    (LACP_SYSTEMPRIOSTR_MAX + 1 + LACP_MACSTR_MAX)
  324 #define LACP_PORTPRIOSTR_MAX    (4)
  325 #define LACP_PORTNOSTR_MAX      (4)
  326 #define LACP_PORTIDSTR_MAX      (LACP_PORTPRIOSTR_MAX + 1 + LACP_PORTNOSTR_MAX)
  327 #define LACP_KEYSTR_MAX         (4)
  328 #define LACP_PARTNERSTR_MAX     \
  329         (1 + LACP_SYSTEMIDSTR_MAX + 1 + LACP_KEYSTR_MAX + 1 \
  330         + LACP_PORTIDSTR_MAX + 1)
  331 #define LACP_LAGIDSTR_MAX       \
  332         (1 + LACP_PARTNERSTR_MAX + 1 + LACP_PARTNERSTR_MAX + 1)
  333 #define LACP_STATESTR_MAX       (255) /* XXX */

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