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: releng/11.0/sys/net/ieee8023ad_lacp.h 286700 2015-08-12 20:21:04Z hiren $
   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 #ifdef _KERNEL
   79 /*
   80  * IEEE802.3 slow protocols
   81  *
   82  * protocol (on-wire) definitions.
   83  *
   84  * XXX should be elsewhere.
   85  */
   86 
   87 #define SLOWPROTOCOLS_SUBTYPE_LACP      1
   88 #define SLOWPROTOCOLS_SUBTYPE_MARKER    2
   89 
   90 struct slowprothdr {
   91         uint8_t         sph_subtype;
   92         uint8_t         sph_version;
   93 } __packed;
   94 
   95 /*
   96  * TLV on-wire structure.
   97  */
   98 
   99 struct tlvhdr {
  100         uint8_t         tlv_type;
  101         uint8_t         tlv_length;
  102         /* uint8_t tlv_value[]; */
  103 } __packed;
  104 
  105 /*
  106  * ... and our implementation.
  107  */
  108 
  109 #define TLV_SET(tlv, type, length) \
  110         do { \
  111                 (tlv)->tlv_type = (type); \
  112                 (tlv)->tlv_length = sizeof(*tlv) + (length); \
  113         } while (/*CONSTCOND*/0)
  114 
  115 struct tlv_template {
  116         uint8_t                 tmpl_type;
  117         uint8_t                 tmpl_length;
  118 };
  119 
  120 struct lacp_systemid {
  121         uint16_t                lsi_prio;
  122         uint8_t                 lsi_mac[6];
  123 } __packed;
  124 
  125 struct lacp_portid {
  126         uint16_t                lpi_prio;
  127         uint16_t                lpi_portno;
  128 } __packed;
  129 
  130 struct lacp_peerinfo {
  131         struct lacp_systemid    lip_systemid;
  132         uint16_t                lip_key;
  133         struct lacp_portid      lip_portid;
  134         uint8_t                 lip_state;
  135         uint8_t                 lip_resv[3];
  136 } __packed;
  137 
  138 struct lacp_collectorinfo {
  139         uint16_t                lci_maxdelay;
  140         uint8_t                 lci_resv[12];
  141 } __packed;
  142 
  143 struct lacpdu {
  144         struct ether_header     ldu_eh;
  145         struct slowprothdr      ldu_sph;
  146 
  147         struct tlvhdr           ldu_tlv_actor;
  148         struct lacp_peerinfo    ldu_actor;
  149         struct tlvhdr           ldu_tlv_partner;
  150         struct lacp_peerinfo    ldu_partner;
  151         struct tlvhdr           ldu_tlv_collector;
  152         struct lacp_collectorinfo ldu_collector;
  153         struct tlvhdr           ldu_tlv_term;
  154         uint8_t                 ldu_resv[50];
  155 } __packed;
  156 
  157 /*
  158  * IEEE802.3ad marker protocol
  159  *
  160  * protocol (on-wire) definitions.
  161  */
  162 struct lacp_markerinfo {
  163         uint16_t                mi_rq_port;
  164         uint8_t                 mi_rq_system[ETHER_ADDR_LEN];
  165         uint32_t                mi_rq_xid;
  166         uint8_t                 mi_pad[2];
  167 } __packed;
  168 
  169 struct markerdu {
  170         struct ether_header     mdu_eh;
  171         struct slowprothdr      mdu_sph;
  172 
  173         struct tlvhdr           mdu_tlv;
  174         struct lacp_markerinfo  mdu_info;
  175         struct tlvhdr           mdu_tlv_term;
  176         uint8_t                 mdu_resv[90];
  177 } __packed;
  178 
  179 #define MARKER_TYPE_INFO        0x01
  180 #define MARKER_TYPE_RESPONSE    0x02
  181 
  182 enum lacp_selected {
  183         LACP_UNSELECTED,
  184         LACP_STANDBY,   /* not used in this implementation */
  185         LACP_SELECTED,
  186 };
  187 
  188 enum lacp_mux_state {
  189         LACP_MUX_DETACHED,
  190         LACP_MUX_WAITING,
  191         LACP_MUX_ATTACHED,
  192         LACP_MUX_COLLECTING,
  193         LACP_MUX_DISTRIBUTING,
  194 };
  195 
  196 #define LACP_MAX_PORTS          32
  197 
  198 struct lacp_portmap {
  199         int                     pm_count;
  200         struct lacp_port        *pm_map[LACP_MAX_PORTS];
  201 };
  202 
  203 struct lacp_port {
  204         TAILQ_ENTRY(lacp_port)  lp_dist_q;
  205         LIST_ENTRY(lacp_port)   lp_next;
  206         struct lacp_softc       *lp_lsc;
  207         struct lagg_port        *lp_lagg;
  208         struct ifnet            *lp_ifp;
  209         struct lacp_peerinfo    lp_partner;
  210         struct lacp_peerinfo    lp_actor;
  211         struct lacp_markerinfo  lp_marker;
  212 #define lp_state        lp_actor.lip_state
  213 #define lp_key          lp_actor.lip_key
  214 #define lp_systemid     lp_actor.lip_systemid
  215         struct timeval          lp_last_lacpdu;
  216         int                     lp_lacpdu_sent;
  217         enum lacp_mux_state     lp_mux_state;
  218         enum lacp_selected      lp_selected;
  219         int                     lp_flags;
  220         u_int                   lp_media; /* XXX redundant */
  221         int                     lp_timer[LACP_NTIMER];
  222         struct ifmultiaddr      *lp_ifma;
  223 
  224         struct lacp_aggregator  *lp_aggregator;
  225 };
  226 
  227 struct lacp_aggregator {
  228         TAILQ_ENTRY(lacp_aggregator)    la_q;
  229         int                     la_refcnt; /* num of ports which selected us */
  230         int                     la_nports; /* num of distributing ports  */
  231         TAILQ_HEAD(, lacp_port) la_ports; /* distributing ports */
  232         struct lacp_peerinfo    la_partner;
  233         struct lacp_peerinfo    la_actor;
  234         int                     la_pending; /* number of ports in wait_while */
  235 };
  236 
  237 struct lacp_softc {
  238         struct lagg_softc       *lsc_softc;
  239         struct mtx              lsc_mtx;
  240         struct lacp_aggregator  *lsc_active_aggregator;
  241         TAILQ_HEAD(, lacp_aggregator) lsc_aggregators;
  242         boolean_t               lsc_suppress_distributing;
  243         struct callout          lsc_transit_callout;
  244         struct callout          lsc_callout;
  245         LIST_HEAD(, lacp_port)  lsc_ports;
  246         struct lacp_portmap     lsc_pmap[2];
  247         volatile u_int          lsc_activemap;
  248         u_int32_t               lsc_hashkey;
  249         struct {
  250                 u_int32_t       lsc_rx_test;
  251                 u_int32_t       lsc_tx_test;
  252         } lsc_debug;
  253         u_int32_t               lsc_strict_mode;
  254         boolean_t               lsc_fast_timeout; /* if set, fast timeout */
  255 };
  256 
  257 #define LACP_TYPE_ACTORINFO     1
  258 #define LACP_TYPE_PARTNERINFO   2
  259 #define LACP_TYPE_COLLECTORINFO 3
  260 
  261 /* timeout values (in sec) */
  262 #define LACP_FAST_PERIODIC_TIME         (1)
  263 #define LACP_SLOW_PERIODIC_TIME         (30)
  264 #define LACP_SHORT_TIMEOUT_TIME         (3 * LACP_FAST_PERIODIC_TIME)
  265 #define LACP_LONG_TIMEOUT_TIME          (3 * LACP_SLOW_PERIODIC_TIME)
  266 #define LACP_CHURN_DETECTION_TIME       (60)
  267 #define LACP_AGGREGATE_WAIT_TIME        (2)
  268 #define LACP_TRANSIT_DELAY              3000    /* in msec */
  269 
  270 #define LACP_STATE_EQ(s1, s2, mask)     \
  271         ((((s1) ^ (s2)) & (mask)) == 0)
  272 
  273 #define LACP_SYS_PRI(peer)      (peer).lip_systemid.lsi_prio
  274 
  275 #define LACP_PORT(_lp)  ((struct lacp_port *)(_lp)->lp_psc)
  276 #define LACP_SOFTC(_sc) ((struct lacp_softc *)(_sc)->sc_psc)
  277 
  278 #define LACP_LOCK_INIT(_lsc)            mtx_init(&(_lsc)->lsc_mtx, \
  279                                             "lacp mtx", NULL, MTX_DEF)
  280 #define LACP_LOCK_DESTROY(_lsc)         mtx_destroy(&(_lsc)->lsc_mtx)
  281 #define LACP_LOCK(_lsc)                 mtx_lock(&(_lsc)->lsc_mtx)
  282 #define LACP_UNLOCK(_lsc)               mtx_unlock(&(_lsc)->lsc_mtx)
  283 #define LACP_LOCK_ASSERT(_lsc)          mtx_assert(&(_lsc)->lsc_mtx, MA_OWNED)
  284 
  285 struct mbuf     *lacp_input(struct lagg_port *, struct mbuf *);
  286 struct lagg_port *lacp_select_tx_port(struct lagg_softc *, struct mbuf *);
  287 void            lacp_attach(struct lagg_softc *);
  288 void            lacp_detach(void *);
  289 void            lacp_init(struct lagg_softc *);
  290 void            lacp_stop(struct lagg_softc *);
  291 int             lacp_port_create(struct lagg_port *);
  292 void            lacp_port_destroy(struct lagg_port *);
  293 void            lacp_linkstate(struct lagg_port *);
  294 void            lacp_req(struct lagg_softc *, void *);
  295 void            lacp_portreq(struct lagg_port *, void *);
  296 
  297 static __inline int
  298 lacp_isactive(struct lagg_port *lgp)
  299 {
  300         struct lacp_port *lp = LACP_PORT(lgp);
  301         struct lacp_softc *lsc = lp->lp_lsc;
  302         struct lacp_aggregator *la = lp->lp_aggregator;
  303 
  304         /* This port is joined to the active aggregator */
  305         if (la != NULL && la == lsc->lsc_active_aggregator)
  306                 return (1);
  307 
  308         return (0);
  309 }
  310 
  311 static __inline int
  312 lacp_iscollecting(struct lagg_port *lgp)
  313 {
  314         struct lacp_port *lp = LACP_PORT(lgp);
  315 
  316         return ((lp->lp_state & LACP_STATE_COLLECTING) != 0);
  317 }
  318 
  319 static __inline int
  320 lacp_isdistributing(struct lagg_port *lgp)
  321 {
  322         struct lacp_port *lp = LACP_PORT(lgp);
  323 
  324         return ((lp->lp_state & LACP_STATE_DISTRIBUTING) != 0);
  325 }
  326 
  327 /* following constants don't include terminating NUL */
  328 #define LACP_MACSTR_MAX         (2*6 + 5)
  329 #define LACP_SYSTEMPRIOSTR_MAX  (4)
  330 #define LACP_SYSTEMIDSTR_MAX    (LACP_SYSTEMPRIOSTR_MAX + 1 + LACP_MACSTR_MAX)
  331 #define LACP_PORTPRIOSTR_MAX    (4)
  332 #define LACP_PORTNOSTR_MAX      (4)
  333 #define LACP_PORTIDSTR_MAX      (LACP_PORTPRIOSTR_MAX + 1 + LACP_PORTNOSTR_MAX)
  334 #define LACP_KEYSTR_MAX         (4)
  335 #define LACP_PARTNERSTR_MAX     \
  336         (1 + LACP_SYSTEMIDSTR_MAX + 1 + LACP_KEYSTR_MAX + 1 \
  337         + LACP_PORTIDSTR_MAX + 1)
  338 #define LACP_LAGIDSTR_MAX       \
  339         (1 + LACP_PARTNERSTR_MAX + 1 + LACP_PARTNERSTR_MAX + 1)
  340 #define LACP_STATESTR_MAX       (255) /* XXX */
  341 #endif  /* _KERNEL */

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