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_bridgevar.h

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    1 /*      $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $  */
    2 
    3 /*
    4  * Copyright 2001 Wasabi Systems, Inc.
    5  * All rights reserved.
    6  *
    7  * Written by Jason R. Thorpe for Wasabi Systems, Inc.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  * 3. All advertising materials mentioning features or use of this software
   18  *    must display the following acknowledgement:
   19  *      This product includes software developed for the NetBSD Project by
   20  *      Wasabi Systems, Inc.
   21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
   22  *    or promote products derived from this software without specific prior
   23  *    written permission.
   24  *
   25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
   26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
   29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   35  * POSSIBILITY OF SUCH DAMAGE.
   36  */
   37 
   38 /*
   39  * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
   40  * All rights reserved.
   41  *
   42  * Redistribution and use in source and binary forms, with or without
   43  * modification, are permitted provided that the following conditions
   44  * are met:
   45  * 1. Redistributions of source code must retain the above copyright
   46  *    notice, this list of conditions and the following disclaimer.
   47  * 2. Redistributions in binary form must reproduce the above copyright
   48  *    notice, this list of conditions and the following disclaimer in the
   49  *    documentation and/or other materials provided with the distribution.
   50  * 3. All advertising materials mentioning features or use of this software
   51  *    must display the following acknowledgement:
   52  *      This product includes software developed by Jason L. Wright
   53  * 4. The name of the author may not be used to endorse or promote products
   54  *    derived from this software without specific prior written permission.
   55  *
   56  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   57  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   58  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   59  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
   60  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   61  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   62  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   64  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   65  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   66  * POSSIBILITY OF SUCH DAMAGE.
   67  *
   68  * OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
   69  *
   70  * $FreeBSD$
   71  */
   72 
   73 /*
   74  * Data structure and control definitions for bridge interfaces.
   75  */
   76 
   77 #include <sys/callout.h>
   78 #include <sys/queue.h>
   79 #include <sys/condvar.h>
   80 
   81 /*
   82  * Commands used in the SIOCSDRVSPEC ioctl.  Note the lookup of the
   83  * bridge interface itself is keyed off the ifdrv structure.
   84  */
   85 #define BRDGADD                 0       /* add bridge member (ifbreq) */
   86 #define BRDGDEL                 1       /* delete bridge member (ifbreq) */
   87 #define BRDGGIFFLGS             2       /* get member if flags (ifbreq) */
   88 #define BRDGSIFFLGS             3       /* set member if flags (ifbreq) */
   89 #define BRDGSCACHE              4       /* set cache size (ifbrparam) */
   90 #define BRDGGCACHE              5       /* get cache size (ifbrparam) */
   91 #define BRDGGIFS                6       /* get member list (ifbifconf) */
   92 #define BRDGRTS                 7       /* get address list (ifbaconf) */
   93 #define BRDGSADDR               8       /* set static address (ifbareq) */
   94 #define BRDGSTO                 9       /* set cache timeout (ifbrparam) */
   95 #define BRDGGTO                 10      /* get cache timeout (ifbrparam) */
   96 #define BRDGDADDR               11      /* delete address (ifbareq) */
   97 #define BRDGFLUSH               12      /* flush address cache (ifbreq) */
   98 
   99 #define BRDGGPRI                13      /* get priority (ifbrparam) */
  100 #define BRDGSPRI                14      /* set priority (ifbrparam) */
  101 #define BRDGGHT                 15      /* get hello time (ifbrparam) */
  102 #define BRDGSHT                 16      /* set hello time (ifbrparam) */
  103 #define BRDGGFD                 17      /* get forward delay (ifbrparam) */
  104 #define BRDGSFD                 18      /* set forward delay (ifbrparam) */
  105 #define BRDGGMA                 19      /* get max age (ifbrparam) */
  106 #define BRDGSMA                 20      /* set max age (ifbrparam) */
  107 #define BRDGSIFPRIO             21      /* set if priority (ifbreq) */
  108 #define BRDGSIFCOST             22      /* set if path cost (ifbreq) */
  109 #define BRDGADDS                23      /* add bridge span member (ifbreq) */
  110 #define BRDGDELS                24      /* delete bridge span member (ifbreq) */
  111 #define BRDGPARAM               25      /* get bridge STP params (ifbropreq) */
  112 #define BRDGGRTE                26      /* get cache drops (ifbrparam) */
  113 #define BRDGGIFSSTP             27      /* get member STP params list
  114                                          * (ifbpstpconf) */
  115 #define BRDGSPROTO              28      /* set protocol (ifbrparam) */
  116 #define BRDGSTXHC               29      /* set tx hold count (ifbrparam) */
  117 #define BRDGSIFAMAX             30      /* set max interface addrs (ifbreq) */
  118 
  119 /*
  120  * Generic bridge control request.
  121  */
  122 struct ifbreq {
  123         char            ifbr_ifsname[IFNAMSIZ]; /* member if name */
  124         uint32_t        ifbr_ifsflags;          /* member if flags */
  125         uint32_t        ifbr_stpflags;          /* member if STP flags */
  126         uint32_t        ifbr_path_cost;         /* member if STP cost */
  127         uint8_t         ifbr_portno;            /* member if port number */
  128         uint8_t         ifbr_priority;          /* member if STP priority */
  129         uint8_t         ifbr_proto;             /* member if STP protocol */
  130         uint8_t         ifbr_role;              /* member if STP role */
  131         uint8_t         ifbr_state;             /* member if STP state */
  132         uint32_t        ifbr_addrcnt;           /* member if addr number */
  133         uint32_t        ifbr_addrmax;           /* member if addr max */
  134         uint32_t        ifbr_addrexceeded;      /* member if addr violations */
  135         uint8_t         pad[32];
  136 };
  137 
  138 /* BRDGGIFFLAGS, BRDGSIFFLAGS */
  139 #define IFBIF_LEARNING          0x0001  /* if can learn */
  140 #define IFBIF_DISCOVER          0x0002  /* if sends packets w/ unknown dest. */
  141 #define IFBIF_STP               0x0004  /* if participates in spanning tree */
  142 #define IFBIF_SPAN              0x0008  /* if is a span port */
  143 #define IFBIF_STICKY            0x0010  /* if learned addresses stick */
  144 #define IFBIF_BSTP_EDGE         0x0020  /* member stp edge port */
  145 #define IFBIF_BSTP_AUTOEDGE     0x0040  /* member stp autoedge enabled */
  146 #define IFBIF_BSTP_PTP          0x0080  /* member stp point to point */
  147 #define IFBIF_BSTP_AUTOPTP      0x0100  /* member stp autoptp enabled */
  148 #define IFBIF_BSTP_ADMEDGE      0x0200  /* member stp admin edge enabled */
  149 #define IFBIF_BSTP_ADMCOST      0x0400  /* member stp admin path cost */
  150 #define IFBIF_PRIVATE           0x0800  /* if is a private segment */
  151 
  152 #define IFBIFBITS       "\020\001LEARNING\002DISCOVER\003STP\004SPAN" \
  153                         "\005STICKY\014PRIVATE\006EDGE\007AUTOEDGE\010PTP" \
  154                         "\011AUTOPTP"
  155 #define IFBIFMASK       ~(IFBIF_BSTP_EDGE|IFBIF_BSTP_AUTOEDGE|IFBIF_BSTP_PTP| \
  156                         IFBIF_BSTP_AUTOPTP|IFBIF_BSTP_ADMEDGE| \
  157                         IFBIF_BSTP_ADMCOST)     /* not saved */
  158 
  159 /* BRDGFLUSH */
  160 #define IFBF_FLUSHDYN           0x00    /* flush learned addresses only */
  161 #define IFBF_FLUSHALL           0x01    /* flush all addresses */
  162 
  163 /*
  164  * Interface list structure.
  165  */
  166 struct ifbifconf {
  167         uint32_t        ifbic_len;      /* buffer size */
  168         union {
  169                 caddr_t ifbicu_buf;
  170                 struct ifbreq *ifbicu_req;
  171         } ifbic_ifbicu;
  172 #define ifbic_buf       ifbic_ifbicu.ifbicu_buf
  173 #define ifbic_req       ifbic_ifbicu.ifbicu_req
  174 };
  175 
  176 /*
  177  * Bridge address request.
  178  */
  179 struct ifbareq {
  180         char            ifba_ifsname[IFNAMSIZ]; /* member if name */
  181         unsigned long   ifba_expire;            /* address expire time */
  182         uint8_t         ifba_flags;             /* address flags */
  183         uint8_t         ifba_dst[ETHER_ADDR_LEN];/* destination address */
  184         uint16_t        ifba_vlan;              /* vlan id */
  185 };
  186 
  187 #define IFBAF_TYPEMASK  0x03    /* address type mask */
  188 #define IFBAF_DYNAMIC   0x00    /* dynamically learned address */
  189 #define IFBAF_STATIC    0x01    /* static address */
  190 #define IFBAF_STICKY    0x02    /* sticky address */
  191 
  192 #define IFBAFBITS       "\020\1STATIC\2STICKY"
  193 
  194 /*
  195  * Address list structure.
  196  */
  197 struct ifbaconf {
  198         uint32_t        ifbac_len;      /* buffer size */
  199         union {
  200                 caddr_t ifbacu_buf;
  201                 struct ifbareq *ifbacu_req;
  202         } ifbac_ifbacu;
  203 #define ifbac_buf       ifbac_ifbacu.ifbacu_buf
  204 #define ifbac_req       ifbac_ifbacu.ifbacu_req
  205 };
  206 
  207 /*
  208  * Bridge parameter structure.
  209  */
  210 struct ifbrparam {
  211         union {
  212                 uint32_t ifbrpu_int32;
  213                 uint16_t ifbrpu_int16;
  214                 uint8_t ifbrpu_int8;
  215         } ifbrp_ifbrpu;
  216 };
  217 #define ifbrp_csize     ifbrp_ifbrpu.ifbrpu_int32       /* cache size */
  218 #define ifbrp_ctime     ifbrp_ifbrpu.ifbrpu_int32       /* cache time (sec) */
  219 #define ifbrp_prio      ifbrp_ifbrpu.ifbrpu_int16       /* bridge priority */
  220 #define ifbrp_proto     ifbrp_ifbrpu.ifbrpu_int8        /* bridge protocol */
  221 #define ifbrp_txhc      ifbrp_ifbrpu.ifbrpu_int8        /* bpdu tx holdcount */
  222 #define ifbrp_hellotime ifbrp_ifbrpu.ifbrpu_int8        /* hello time (sec) */
  223 #define ifbrp_fwddelay  ifbrp_ifbrpu.ifbrpu_int8        /* fwd time (sec) */
  224 #define ifbrp_maxage    ifbrp_ifbrpu.ifbrpu_int8        /* max age (sec) */
  225 #define ifbrp_cexceeded ifbrp_ifbrpu.ifbrpu_int32       /* # of cache dropped
  226                                                          * adresses */
  227 /*
  228  * Bridge current operational parameters structure.
  229  */
  230 struct ifbropreq {
  231         uint8_t         ifbop_holdcount;
  232         uint8_t         ifbop_maxage;
  233         uint8_t         ifbop_hellotime;
  234         uint8_t         ifbop_fwddelay;
  235         uint8_t         ifbop_protocol;
  236         uint16_t        ifbop_priority;
  237         uint16_t        ifbop_root_port;
  238         uint32_t        ifbop_root_path_cost;
  239         uint64_t        ifbop_bridgeid;
  240         uint64_t        ifbop_designated_root;
  241         uint64_t        ifbop_designated_bridge;
  242         struct timeval  ifbop_last_tc_time;
  243 };
  244 
  245 /*
  246  * Bridge member operational STP params structure.
  247  */
  248 struct ifbpstpreq {
  249         uint8_t         ifbp_portno;            /* bp STP port number */
  250         uint32_t        ifbp_fwd_trans;         /* bp STP fwd transitions */
  251         uint32_t        ifbp_design_cost;       /* bp STP designated cost */
  252         uint32_t        ifbp_design_port;       /* bp STP designated port */
  253         uint64_t        ifbp_design_bridge;     /* bp STP designated bridge */
  254         uint64_t        ifbp_design_root;       /* bp STP designated root */
  255 };
  256 
  257 /*
  258  * Bridge STP ports list structure.
  259  */
  260 struct ifbpstpconf {
  261         uint32_t        ifbpstp_len;    /* buffer size */
  262         union {
  263                 caddr_t ifbpstpu_buf;
  264                 struct ifbpstpreq *ifbpstpu_req;
  265         } ifbpstp_ifbpstpu;
  266 #define ifbpstp_buf     ifbpstp_ifbpstpu.ifbpstpu_buf
  267 #define ifbpstp_req     ifbpstp_ifbpstpu.ifbpstpu_req
  268 };
  269 
  270 #ifdef _KERNEL
  271 
  272 #define BRIDGE_LOCK_INIT(_sc)           do {                    \
  273         mtx_init(&(_sc)->sc_mtx, "if_bridge", NULL, MTX_DEF);   \
  274         cv_init(&(_sc)->sc_cv, "if_bridge_cv");                 \
  275 } while (0)
  276 #define BRIDGE_LOCK_DESTROY(_sc)        do {    \
  277         mtx_destroy(&(_sc)->sc_mtx);            \
  278         cv_destroy(&(_sc)->sc_cv);              \
  279 } while (0)
  280 #define BRIDGE_LOCK(_sc)                mtx_lock(&(_sc)->sc_mtx)
  281 #define BRIDGE_UNLOCK(_sc)              mtx_unlock(&(_sc)->sc_mtx)
  282 #define BRIDGE_LOCK_ASSERT(_sc)         mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
  283 #define BRIDGE_UNLOCK_ASSERT(_sc)       mtx_assert(&(_sc)->sc_mtx, MA_NOTOWNED)
  284 #define BRIDGE_LOCK2REF(_sc, _err)      do {    \
  285         mtx_assert(&(_sc)->sc_mtx, MA_OWNED);   \
  286         if ((_sc)->sc_iflist_xcnt > 0)          \
  287                 (_err) = EBUSY;                 \
  288         else                                    \
  289                 (_sc)->sc_iflist_ref++;         \
  290         mtx_unlock(&(_sc)->sc_mtx);             \
  291 } while (0)
  292 #define BRIDGE_UNREF(_sc)               do {                            \
  293         mtx_lock(&(_sc)->sc_mtx);                                       \
  294         (_sc)->sc_iflist_ref--;                                         \
  295         if (((_sc)->sc_iflist_xcnt > 0) && ((_sc)->sc_iflist_ref == 0)) \
  296                 cv_broadcast(&(_sc)->sc_cv);                            \
  297         mtx_unlock(&(_sc)->sc_mtx);                                     \
  298 } while (0)
  299 #define BRIDGE_XLOCK(_sc)               do {            \
  300         mtx_assert(&(_sc)->sc_mtx, MA_OWNED);           \
  301         (_sc)->sc_iflist_xcnt++;                        \
  302         while ((_sc)->sc_iflist_ref > 0)                \
  303                 cv_wait(&(_sc)->sc_cv, &(_sc)->sc_mtx); \
  304 } while (0)
  305 #define BRIDGE_XDROP(_sc)               do {    \
  306         mtx_assert(&(_sc)->sc_mtx, MA_OWNED);   \
  307         (_sc)->sc_iflist_xcnt--;                \
  308 } while (0)
  309 
  310 #define BRIDGE_INPUT(_ifp, _m)          do {            \
  311         KASSERT(bridge_input_p != NULL,                 \
  312             ("%s: if_bridge not loaded!", __func__));   \
  313         _m = (*bridge_input_p)(_ifp, _m);               \
  314         if (_m != NULL)                                 \
  315                 _ifp = _m->m_pkthdr.rcvif;              \
  316 } while (0)
  317 
  318 #define BRIDGE_OUTPUT(_ifp, _m, _err)   do {                    \
  319         KASSERT(bridge_output_p != NULL,                        \
  320             ("%s: if_bridge not loaded!", __func__));           \
  321         _err = (*bridge_output_p)(_ifp, _m, NULL, NULL);        \
  322 } while (0)
  323 
  324 extern  struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
  325 extern  int (*bridge_output_p)(struct ifnet *, struct mbuf *,
  326                 struct sockaddr *, struct rtentry *);
  327 extern  void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
  328 
  329 #endif /* _KERNEL */

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