114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
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/*
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* Copyright (c) 1982, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)if.h 8.1 (Berkeley) 6/10/93
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* $FreeBSD$
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*/
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#ifndef _NET_IF_CLONE_H_
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#define _NET_IF_CLONE_H_
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#ifdef _KERNEL
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#define IFC_CLONE_INITIALIZER(name, data, maxunit, \
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attach, match, create, destroy) \
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{ { 0 }, name, maxunit, NULL, 0, data, attach, match, create, destroy }
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/*
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* Structure describing a `cloning' interface.
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*
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* List of locks
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* (c) const until freeing
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* (d) driver specific data, may need external protection.
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* (e) locked by if_cloners_mtx
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* (i) locked by ifc_mtx mtx
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*/
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struct if_clone {
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LIST_ENTRY(if_clone) ifc_list; /* (e) On list of cloners */
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const char *ifc_name; /* (c) Name of device, e.g. `gif' */
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int ifc_maxunit; /* (c) Maximum unit number */
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unsigned char *ifc_units; /* (i) Bitmap to handle units. */
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/* Considered private, access */
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/* via ifc_(alloc|free)_unit(). */
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int ifc_bmlen; /* (c) Bitmap length. */
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void *ifc_data; /* (*) Data for ifc_* functions. */
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/* (c) Driver specific cloning functions. Called with no locks held. */
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void (*ifc_attach)(struct if_clone *);
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int (*ifc_match)(struct if_clone *, const char *);
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int (*ifc_create)(struct if_clone *, char *, size_t);
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int (*ifc_destroy)(struct if_clone *, struct ifnet *);
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long ifc_refcnt; /* (i) Refrence count. */
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struct mtx ifc_mtx; /* Muted to protect members. */
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};
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void if_clone_init(void);
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void if_clone_attach(struct if_clone *);
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void if_clone_detach(struct if_clone *);
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int if_clone_create(char *, size_t);
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int if_clone_destroy(const char *);
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int if_clone_list(struct if_clonereq *);
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int ifc_name2unit(const char *name, int *unit);
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int ifc_alloc_unit(struct if_clone *, int *);
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void ifc_free_unit(struct if_clone *, int);
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/*
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* The ifc_simple functions, structures, and macros implement basic
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* cloning as in 5.[012].
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*/
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struct ifc_simple_data {
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int ifcs_minifs; /* minimum number of interfaces */
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int (*ifcs_create)(struct if_clone *, int);
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void (*ifcs_destroy)(struct ifnet *);
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};
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/* interface clone event */
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typedef void (*if_clone_event_handler_t)(void *, struct if_clone *);
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EVENTHANDLER_DECLARE(if_clone_event, if_clone_event_handler_t);
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#define IFC_SIMPLE_DECLARE(name, minifs) \
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struct ifc_simple_data name##_cloner_data = \
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{minifs, name##_clone_create, name##_clone_destroy}; \
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struct if_clone name##_cloner = \
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IFC_CLONE_INITIALIZER(#name, &name##_cloner_data, IF_MAXUNIT, \
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ifc_simple_attach, ifc_simple_match, ifc_simple_create, ifc_simple_destroy)
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void ifc_simple_attach(struct if_clone *);
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int ifc_simple_match(struct if_clone *, const char *);
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int ifc_simple_create(struct if_clone *, char *, size_t);
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int ifc_simple_destroy(struct if_clone *, struct ifnet *);
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#endif /* _KERNEL */
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#endif /* !_NET_IF_CLONE_H_ */
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