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freebsd/sys/net/if_bridgevar.h
Andrew Thompson 7c2fb83a0b Add code that clears certain capabilities from the member interface, these are 
restored when its removed from the bridge.

At the moment we only clear IFCAP_TXCSUM. Since a locally generated packet on
the bridge may be sent out any one or more interfaces it cant be assumed that
every card does hardware csums. Most bridges don't generate a lot of traffic
themselves so turning off offloading won't hurt, bridged packets are
unaffected.

Tested by:	Bruce Walker (bmw borderware.com)
MFC after:	5 days
2006-01-14 03:51:31 +00:00

376 lines
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/* $NetBSD: if_bridgevar.h,v 1.4 2003/07/08 07:13:50 itojun Exp $ */
/*
* Copyright 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jason L. Wright
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* OpenBSD: if_bridge.h,v 1.14 2001/03/22 03:48:29 jason Exp
*
* $FreeBSD$
*/
/*
* Data structure and control definitions for bridge interfaces.
*/
#include <sys/callout.h>
#include <sys/queue.h>
#include <sys/condvar.h>
/*
* Commands used in the SIOCSDRVSPEC ioctl. Note the lookup of the
* bridge interface itself is keyed off the ifdrv structure.
*/
#define BRDGADD 0 /* add bridge member (ifbreq) */
#define BRDGDEL 1 /* delete bridge member (ifbreq) */
#define BRDGGIFFLGS 2 /* get member if flags (ifbreq) */
#define BRDGSIFFLGS 3 /* set member if flags (ifbreq) */
#define BRDGSCACHE 4 /* set cache size (ifbrparam) */
#define BRDGGCACHE 5 /* get cache size (ifbrparam) */
#define BRDGGIFS 6 /* get member list (ifbifconf) */
#define BRDGRTS 7 /* get address list (ifbaconf) */
#define BRDGSADDR 8 /* set static address (ifbareq) */
#define BRDGSTO 9 /* set cache timeout (ifbrparam) */
#define BRDGGTO 10 /* get cache timeout (ifbrparam) */
#define BRDGDADDR 11 /* delete address (ifbareq) */
#define BRDGFLUSH 12 /* flush address cache (ifbreq) */
#define BRDGGPRI 13 /* get priority (ifbrparam) */
#define BRDGSPRI 14 /* set priority (ifbrparam) */
#define BRDGGHT 15 /* get hello time (ifbrparam) */
#define BRDGSHT 16 /* set hello time (ifbrparam) */
#define BRDGGFD 17 /* get forward delay (ifbrparam) */
#define BRDGSFD 18 /* set forward delay (ifbrparam) */
#define BRDGGMA 19 /* get max age (ifbrparam) */
#define BRDGSMA 20 /* set max age (ifbrparam) */
#define BRDGSIFPRIO 21 /* set if priority (ifbreq) */
#define BRDGSIFCOST 22 /* set if path cost (ifbreq) */
#define BRDGADDS 23 /* add bridge span member (ifbreq) */
#define BRDGDELS 24 /* delete bridge span member (ifbreq) */
/*
* Generic bridge control request.
*/
struct ifbreq {
char ifbr_ifsname[IFNAMSIZ]; /* member if name */
uint32_t ifbr_ifsflags; /* member if flags */
uint8_t ifbr_state; /* member if STP state */
uint8_t ifbr_priority; /* member if STP priority */
uint8_t ifbr_path_cost; /* member if STP cost */
uint8_t ifbr_portno; /* member if port number */
};
/* BRDGGIFFLAGS, BRDGSIFFLAGS */
#define IFBIF_LEARNING 0x01 /* if can learn */
#define IFBIF_DISCOVER 0x02 /* if sends packets w/ unknown dest. */
#define IFBIF_STP 0x04 /* if participates in spanning tree */
#define IFBIF_SPAN 0x08 /* if is a span port */
#define IFBIFBITS "\020\1LEARNING\2DISCOVER\3STP\4SPAN"
/* BRDGFLUSH */
#define IFBF_FLUSHDYN 0x00 /* flush learned addresses only */
#define IFBF_FLUSHALL 0x01 /* flush all addresses */
/* STP port states */
#define BSTP_IFSTATE_DISABLED 0
#define BSTP_IFSTATE_LISTENING 1
#define BSTP_IFSTATE_LEARNING 2
#define BSTP_IFSTATE_FORWARDING 3
#define BSTP_IFSTATE_BLOCKING 4
/*
* Interface list structure.
*/
struct ifbifconf {
uint32_t ifbic_len; /* buffer size */
union {
caddr_t ifbicu_buf;
struct ifbreq *ifbicu_req;
} ifbic_ifbicu;
#define ifbic_buf ifbic_ifbicu.ifbicu_buf
#define ifbic_req ifbic_ifbicu.ifbicu_req
};
/*
* Bridge address request.
*/
struct ifbareq {
char ifba_ifsname[IFNAMSIZ]; /* member if name */
unsigned long ifba_expire; /* address expire time */
uint8_t ifba_flags; /* address flags */
uint8_t ifba_dst[ETHER_ADDR_LEN];/* destination address */
};
#define IFBAF_TYPEMASK 0x03 /* address type mask */
#define IFBAF_DYNAMIC 0x00 /* dynamically learned address */
#define IFBAF_STATIC 0x01 /* static address */
#define IFBAFBITS "\020\1STATIC"
/*
* Address list structure.
*/
struct ifbaconf {
uint32_t ifbac_len; /* buffer size */
union {
caddr_t ifbacu_buf;
struct ifbareq *ifbacu_req;
} ifbac_ifbacu;
#define ifbac_buf ifbac_ifbacu.ifbacu_buf
#define ifbac_req ifbac_ifbacu.ifbacu_req
};
/*
* Bridge parameter structure.
*/
struct ifbrparam {
union {
uint32_t ifbrpu_int32;
uint16_t ifbrpu_int16;
uint8_t ifbrpu_int8;
} ifbrp_ifbrpu;
};
#define ifbrp_csize ifbrp_ifbrpu.ifbrpu_int32 /* cache size */
#define ifbrp_ctime ifbrp_ifbrpu.ifbrpu_int32 /* cache time (sec) */
#define ifbrp_prio ifbrp_ifbrpu.ifbrpu_int16 /* bridge priority */
#define ifbrp_hellotime ifbrp_ifbrpu.ifbrpu_int8 /* hello time (sec) */
#define ifbrp_fwddelay ifbrp_ifbrpu.ifbrpu_int8 /* fwd time (sec) */
#define ifbrp_maxage ifbrp_ifbrpu.ifbrpu_int8 /* max age (sec) */
#ifdef _KERNEL
/*
* Timekeeping structure used in spanning tree code.
*/
struct bridge_timer {
uint16_t active;
uint16_t value;
};
struct bstp_config_unit {
uint64_t cu_rootid;
uint64_t cu_bridge_id;
uint32_t cu_root_path_cost;
uint16_t cu_message_age;
uint16_t cu_max_age;
uint16_t cu_hello_time;
uint16_t cu_forward_delay;
uint16_t cu_port_id;
uint8_t cu_message_type;
uint8_t cu_topology_change_acknowledgment;
uint8_t cu_topology_change;
};
struct bstp_tcn_unit {
uint8_t tu_message_type;
};
/*
* Bridge interface list entry.
*/
struct bridge_iflist {
LIST_ENTRY(bridge_iflist) bif_next;
uint64_t bif_designated_root;
uint64_t bif_designated_bridge;
uint32_t bif_path_cost;
uint32_t bif_designated_cost;
struct bridge_timer bif_hold_timer;
struct bridge_timer bif_message_age_timer;
struct bridge_timer bif_forward_delay_timer;
struct bstp_config_unit bif_config_bpdu;
uint16_t bif_port_id;
uint16_t bif_designated_port;
uint8_t bif_state;
uint8_t bif_topology_change_acknowledge;
uint8_t bif_config_pending;
uint8_t bif_change_detection_enabled;
uint8_t bif_priority;
struct ifnet *bif_ifp; /* member if */
uint32_t bif_flags; /* member if flags */
int bif_mutecap; /* member muted caps */
};
/*
* Bridge route node.
*/
struct bridge_rtnode {
LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
struct ifnet *brt_ifp; /* destination if */
unsigned long brt_expire; /* expiration time */
uint8_t brt_flags; /* address flags */
uint8_t brt_addr[ETHER_ADDR_LEN];
};
/*
* Software state for each bridge.
*/
struct bridge_softc {
struct ifnet *sc_ifp; /* make this an interface */
LIST_ENTRY(bridge_softc) sc_list;
struct mtx sc_mtx;
struct cv sc_cv;
uint64_t sc_designated_root;
uint64_t sc_bridge_id;
struct bridge_iflist *sc_root_port;
uint32_t sc_root_path_cost;
uint16_t sc_max_age;
uint16_t sc_hello_time;
uint16_t sc_forward_delay;
uint16_t sc_bridge_max_age;
uint16_t sc_bridge_hello_time;
uint16_t sc_bridge_forward_delay;
uint16_t sc_topology_change_time;
uint16_t sc_hold_time;
uint16_t sc_bridge_priority;
uint8_t sc_topology_change_detected;
uint8_t sc_topology_change;
struct bridge_timer sc_hello_timer;
struct bridge_timer sc_topology_change_timer;
struct bridge_timer sc_tcn_timer;
uint32_t sc_brtmax; /* max # of addresses */
uint32_t sc_brtcnt; /* cur. # of addresses */
uint32_t sc_brttimeout; /* rt timeout in seconds */
struct callout sc_brcallout; /* bridge callout */
struct callout sc_bstpcallout; /* STP callout */
uint32_t sc_iflist_ref; /* refcount for sc_iflist */
uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
uint32_t sc_rthash_key; /* key for hash */
LIST_HEAD(, bridge_iflist) sc_spanlist; /* span ports list */
};
#define BRIDGE_LOCK_INIT(_sc) do { \
mtx_init(&(_sc)->sc_mtx, "if_bridge", NULL, MTX_DEF); \
cv_init(&(_sc)->sc_cv, "if_bridge_cv"); \
} while (0)
#define BRIDGE_LOCK_DESTROY(_sc) do { \
mtx_destroy(&(_sc)->sc_mtx); \
cv_destroy(&(_sc)->sc_cv); \
} while (0)
#define BRIDGE_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define BRIDGE_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define BRIDGE_LOCKED(_sc) mtx_owned(&(_sc)->sc_mtx)
#define BRIDGE_LOCK_ASSERT(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED)
#define BRIDGE_LOCK2REF(_sc, _err) do { \
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
if ((_sc)->sc_iflist_xcnt > 0) \
(_err) = EBUSY; \
else \
(_sc)->sc_iflist_ref++; \
mtx_unlock(&(_sc)->sc_mtx); \
} while (0)
#define BRIDGE_UNREF(_sc) do { \
mtx_lock(&(_sc)->sc_mtx); \
(_sc)->sc_iflist_ref--; \
if (((_sc)->sc_iflist_xcnt > 0) && ((_sc)->sc_iflist_ref == 0)) \
cv_broadcast(&(_sc)->sc_cv); \
mtx_unlock(&(_sc)->sc_mtx); \
} while (0)
#define BRIDGE_XLOCK(_sc) do { \
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
(_sc)->sc_iflist_xcnt++; \
while ((_sc)->sc_iflist_ref > 0) \
cv_wait(&(_sc)->sc_cv, &(_sc)->sc_mtx); \
} while (0)
#define BRIDGE_XDROP(_sc) do { \
mtx_assert(&(_sc)->sc_mtx, MA_OWNED); \
(_sc)->sc_iflist_xcnt--; \
} while (0)
#define BRIDGE_INPUT(_ifp, _m) do { \
KASSERT(bridge_input_p != NULL, \
("%s: if_bridge not loaded!", __func__)); \
_m = (*bridge_input_p)(_ifp, _m); \
if (_m != NULL) \
_ifp = _m->m_pkthdr.rcvif; \
} while (0)
#define BRIDGE_OUTPUT(_ifp, _m, _err) do { \
KASSERT(bridge_output_p != NULL, \
("%s: if_bridge not loaded!", __func__)); \
_err = (*bridge_output_p)(_ifp, _m, NULL, NULL); \
} while (0)
extern const uint8_t bstp_etheraddr[];
void bridge_enqueue(struct bridge_softc *, struct ifnet *, struct mbuf *);
void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
extern int (*bridge_output_p)(struct ifnet *, struct mbuf *,
struct sockaddr *, struct rtentry *);
extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
extern void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
void bstp_initialization(struct bridge_softc *);
void bstp_linkstate(struct ifnet *, int);
void bstp_stop(struct bridge_softc *);
struct mbuf *bstp_input(struct ifnet *, struct mbuf *);
#endif /* _KERNEL */
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