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/if_lagg.h

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    1 /*      $OpenBSD: if_trunk.h,v 1.11 2007/01/31 06:20:19 reyk Exp $      */
    2 
    3 /*
    4  * Copyright (c) 2005, 2006 Reyk Floeter <reyk@openbsd.org>
    5  *
    6  * Permission to use, copy, modify, and distribute this software for any
    7  * purpose with or without fee is hereby granted, provided that the above
    8  * copyright notice and this permission notice appear in all copies.
    9  *
   10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   17  *
   18  * $FreeBSD: stable/8/sys/net/if_lagg.h 236057 2012-05-26 07:59:56Z thompsa $
   19  */
   20 
   21 #ifndef _NET_LAGG_H
   22 #define _NET_LAGG_H
   23 
   24 #include <sys/sysctl.h>
   25 
   26 /*
   27  * Global definitions
   28  */
   29 
   30 #define LAGG_MAX_PORTS          32      /* logically */
   31 #define LAGG_MAX_NAMESIZE       32      /* name of a protocol */
   32 #define LAGG_MAX_STACKING       4       /* maximum number of stacked laggs */
   33 
   34 /* Lagg flags */
   35 #define LAGG_F_HASHL2           0x00000001      /* hash layer 2 */
   36 #define LAGG_F_HASHL3           0x00000002      /* hash layer 3 */
   37 #define LAGG_F_HASHL4           0x00000004      /* hash layer 4 */
   38 #define LAGG_F_HASHMASK         0x00000007
   39 
   40 /* Port flags */
   41 #define LAGG_PORT_SLAVE         0x00000000      /* normal enslaved port */
   42 #define LAGG_PORT_MASTER        0x00000001      /* primary port */
   43 #define LAGG_PORT_STACK         0x00000002      /* stacked lagg port */
   44 #define LAGG_PORT_ACTIVE        0x00000004      /* port is active */
   45 #define LAGG_PORT_COLLECTING    0x00000008      /* port is receiving frames */
   46 #define LAGG_PORT_DISTRIBUTING  0x00000010      /* port is sending frames */
   47 #define LAGG_PORT_DISABLED      0x00000020      /* port is disabled */
   48 #define LAGG_PORT_BITS          "\2\01MASTER\02STACK\03ACTIVE\04COLLECTING" \
   49                                   "\05DISTRIBUTING\06DISABLED"
   50 
   51 /* Supported lagg PROTOs */
   52 #define LAGG_PROTO_NONE         0       /* no lagg protocol defined */
   53 #define LAGG_PROTO_ROUNDROBIN   1       /* simple round robin */
   54 #define LAGG_PROTO_FAILOVER     2       /* active failover */
   55 #define LAGG_PROTO_LOADBALANCE  3       /* loadbalance */
   56 #define LAGG_PROTO_LACP         4       /* 802.3ad lacp */
   57 #define LAGG_PROTO_ETHERCHANNEL 5       /* Cisco FEC */
   58 #define LAGG_PROTO_MAX          6
   59 
   60 struct lagg_protos {
   61         const char              *lpr_name;
   62         int                     lpr_proto;
   63 };
   64 
   65 #define LAGG_PROTO_DEFAULT      LAGG_PROTO_FAILOVER
   66 #define LAGG_PROTOS     {                                               \
   67         { "failover",           LAGG_PROTO_FAILOVER },                  \
   68         { "fec",                LAGG_PROTO_ETHERCHANNEL },              \
   69         { "lacp",               LAGG_PROTO_LACP },                      \
   70         { "loadbalance",        LAGG_PROTO_LOADBALANCE },               \
   71         { "roundrobin",         LAGG_PROTO_ROUNDROBIN },                \
   72         { "none",               LAGG_PROTO_NONE },                      \
   73         { "default",            LAGG_PROTO_DEFAULT }                    \
   74 }
   75 
   76 /*
   77  * lagg ioctls.
   78  */
   79 
   80 /*
   81  * LACP current operational parameters structure.
   82  */
   83 struct lacp_opreq {
   84         uint16_t                actor_prio;
   85         uint8_t                 actor_mac[ETHER_ADDR_LEN];
   86         uint16_t                actor_key;
   87         uint16_t                actor_portprio;
   88         uint16_t                actor_portno;
   89         uint8_t                 actor_state;
   90         uint16_t                partner_prio;
   91         uint8_t                 partner_mac[ETHER_ADDR_LEN];
   92         uint16_t                partner_key;
   93         uint16_t                partner_portprio;
   94         uint16_t                partner_portno;
   95         uint8_t                 partner_state;
   96 };
   97 
   98 /* lagg port settings */
   99 struct lagg_reqport {
  100         char                    rp_ifname[IFNAMSIZ];    /* name of the lagg */
  101         char                    rp_portname[IFNAMSIZ];  /* name of the port */
  102         u_int32_t               rp_prio;                /* port priority */
  103         u_int32_t               rp_flags;               /* port flags */
  104         union {
  105                 struct lacp_opreq rpsc_lacp;
  106         } rp_psc;
  107 #define rp_lacpreq      rp_psc.rpsc_lacp
  108 };
  109 
  110 #define SIOCGLAGGPORT           _IOWR('i', 140, struct lagg_reqport)
  111 #define SIOCSLAGGPORT            _IOW('i', 141, struct lagg_reqport)
  112 #define SIOCSLAGGDELPORT         _IOW('i', 142, struct lagg_reqport)
  113 
  114 /* lagg, ports and options */
  115 struct lagg_reqall {
  116         char                    ra_ifname[IFNAMSIZ];    /* name of the lagg */
  117         u_int                   ra_proto;               /* lagg protocol */
  118 
  119         size_t                  ra_size;                /* size of buffer */
  120         struct lagg_reqport     *ra_port;               /* allocated buffer */
  121         int                     ra_ports;               /* total port count */
  122         union {
  123                 struct lacp_opreq rpsc_lacp;
  124         } ra_psc;
  125 #define ra_lacpreq      ra_psc.rpsc_lacp
  126 };
  127 
  128 #define SIOCGLAGG               _IOWR('i', 143, struct lagg_reqall)
  129 #define SIOCSLAGG                _IOW('i', 144, struct lagg_reqall)
  130 
  131 struct lagg_reqflags {
  132         char                    rf_ifname[IFNAMSIZ];    /* name of the lagg */
  133         uint32_t                rf_flags;               /* lagg protocol */
  134 };
  135 
  136 #define SIOCGLAGGFLAGS          _IOWR('i', 145, struct lagg_reqflags)
  137 #define SIOCSLAGGHASH            _IOW('i', 146, struct lagg_reqflags)
  138 
  139 #ifdef _KERNEL
  140 /*
  141  * Internal kernel part
  142  */
  143 
  144 #define lp_ifname               lp_ifp->if_xname        /* interface name */
  145 #define lp_link_state           lp_ifp->if_link_state   /* link state */
  146 
  147 #define LAGG_PORTACTIVE(_tp)    (                                       \
  148         ((_tp)->lp_link_state == LINK_STATE_UP) &&                      \
  149         ((_tp)->lp_ifp->if_flags & IFF_UP)                              \
  150 )
  151 
  152 struct lagg_ifreq {
  153         union {
  154                 struct ifreq ifreq;
  155                 struct {
  156                         char ifr_name[IFNAMSIZ];
  157                         struct sockaddr_storage ifr_ss;
  158                 } ifreq_storage;
  159         } ifreq;
  160 };
  161 
  162 #define sc_ifflags              sc_ifp->if_flags                /* flags */
  163 #define sc_ifname               sc_ifp->if_xname                /* name */
  164 #define sc_capabilities         sc_ifp->if_capabilities /* capabilities */
  165 
  166 #define IFCAP_LAGG_MASK         0xffff0000      /* private capabilities */
  167 #define IFCAP_LAGG_FULLDUPLEX   0x00010000      /* full duplex with >1 ports */
  168 
  169 /* Private data used by the loadbalancing protocol */
  170 struct lagg_lb {
  171         u_int32_t               lb_key;
  172         struct lagg_port        *lb_ports[LAGG_MAX_PORTS];
  173 };
  174 
  175 struct lagg_mc {
  176         struct ifmultiaddr      *mc_ifma;
  177         SLIST_ENTRY(lagg_mc)    mc_entries;
  178 };
  179 
  180 /* List of interfaces to have the MAC address modified */
  181 struct lagg_llq {
  182         struct ifnet            *llq_ifp;
  183         uint8_t                 llq_lladdr[ETHER_ADDR_LEN];
  184         SLIST_ENTRY(lagg_llq)   llq_entries;
  185 };
  186 
  187 struct lagg_softc {
  188         struct ifnet                    *sc_ifp;        /* virtual interface */
  189         struct rwlock                   sc_mtx;
  190         int                             sc_proto;       /* lagg protocol */
  191         u_int                           sc_count;       /* number of ports */
  192         struct lagg_port                *sc_primary;    /* primary port */
  193         struct ifmedia                  sc_media;       /* media config */
  194         caddr_t                         sc_psc;         /* protocol data */
  195         uint32_t                        sc_seq;         /* sequence counter */
  196         uint32_t                        sc_flags;
  197 
  198         SLIST_HEAD(__tplhd, lagg_port)  sc_ports;       /* list of interfaces */
  199         SLIST_ENTRY(lagg_softc) sc_entries;
  200 
  201         struct task                     sc_lladdr_task;
  202         SLIST_HEAD(__llqhd, lagg_llq)   sc_llq_head;    /* interfaces to program
  203                                                            the lladdr on */
  204 
  205         /* lagg protocol callbacks */
  206         int     (*sc_detach)(struct lagg_softc *);
  207         int     (*sc_start)(struct lagg_softc *, struct mbuf *);
  208         struct mbuf *(*sc_input)(struct lagg_softc *, struct lagg_port *,
  209                     struct mbuf *);
  210         int     (*sc_port_create)(struct lagg_port *);
  211         void    (*sc_port_destroy)(struct lagg_port *);
  212         void    (*sc_linkstate)(struct lagg_port *);
  213         void    (*sc_init)(struct lagg_softc *);
  214         void    (*sc_stop)(struct lagg_softc *);
  215         void    (*sc_lladdr)(struct lagg_softc *);
  216         void    (*sc_req)(struct lagg_softc *, caddr_t);
  217         void    (*sc_portreq)(struct lagg_port *, caddr_t);
  218 #if __FreeBSD_version >= 800000
  219         eventhandler_tag vlan_attach;
  220         eventhandler_tag vlan_detach;
  221 #endif
  222         struct sysctl_ctx_list          ctx;            /* sysctl variables */
  223         int                             use_flowid;     /* use M_FLOWID */
  224 };
  225 
  226 struct lagg_port {
  227         struct ifnet                    *lp_ifp;        /* physical interface */
  228         struct lagg_softc               *lp_softc;      /* parent lagg */
  229         uint8_t                         lp_lladdr[ETHER_ADDR_LEN];
  230 
  231         u_char                          lp_iftype;      /* interface type */
  232         uint32_t                        lp_prio;        /* port priority */
  233         uint32_t                        lp_flags;       /* port flags */
  234         int                             lp_ifflags;     /* saved ifp flags */
  235         void                            *lh_cookie;     /* if state hook */
  236         caddr_t                         lp_psc;         /* protocol data */
  237         int                             lp_detaching;   /* ifnet is detaching */
  238 
  239         SLIST_HEAD(__mclhd, lagg_mc)    lp_mc_head;     /* multicast addresses */
  240 
  241         /* Redirected callbacks */
  242         int     (*lp_ioctl)(struct ifnet *, u_long, caddr_t);
  243         int     (*lp_output)(struct ifnet *, struct mbuf *, struct sockaddr *,
  244                      struct route *);
  245 
  246         SLIST_ENTRY(lagg_port)          lp_entries;
  247 };
  248 
  249 #define LAGG_LOCK_INIT(_sc)     rw_init(&(_sc)->sc_mtx, "if_lagg rwlock")
  250 #define LAGG_LOCK_DESTROY(_sc)  rw_destroy(&(_sc)->sc_mtx)
  251 #define LAGG_RLOCK(_sc)         rw_rlock(&(_sc)->sc_mtx)
  252 #define LAGG_WLOCK(_sc)         rw_wlock(&(_sc)->sc_mtx)
  253 #define LAGG_RUNLOCK(_sc)       rw_runlock(&(_sc)->sc_mtx)
  254 #define LAGG_WUNLOCK(_sc)       rw_wunlock(&(_sc)->sc_mtx)
  255 #define LAGG_RLOCK_ASSERT(_sc)  rw_assert(&(_sc)->sc_mtx, RA_RLOCKED)
  256 #define LAGG_WLOCK_ASSERT(_sc)  rw_assert(&(_sc)->sc_mtx, RA_WLOCKED)
  257 
  258 extern struct mbuf *(*lagg_input_p)(struct ifnet *, struct mbuf *);
  259 extern void     (*lagg_linkstate_p)(struct ifnet *, int );
  260 
  261 int             lagg_enqueue(struct ifnet *, struct mbuf *);
  262 uint32_t        lagg_hashmbuf(struct lagg_softc *, struct mbuf *, uint32_t);
  263 
  264 #endif /* _KERNEL */
  265 
  266 #endif /* _NET_LAGG_H */

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