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d0728d7174
network stacks, VNET_SYSINIT: - Add VNET_SYSINIT and VNET_SYSUNINIT macros to declare events that will occur each time a network stack is instantiated and destroyed. In the !VIMAGE case, these are simply mapped into regular SYSINIT/SYSUNINIT. For the VIMAGE case, we instead use SYSINIT's to track their order and properties on registration, using them for each vnet when created/ destroyed, or immediately on module load for already-started vnets. - Remove vnet_modinfo mechanism that existed to serve this purpose previously, as well as its dependency scheme: we now just use the SYSINIT ordering scheme. - Implement VNET_DOMAIN_SET() to allow protocol domains to declare that they want init functions to be called for each virtual network stack rather than just once at boot, compiling down to DOMAIN_SET() in the non-VIMAGE case. - Walk all virtualized kernel subsystems and make use of these instead of modinfo or DOMAIN_SET() for init/uninit events. In some cases, convert modular components from using modevent to using sysinit (where appropriate). In some cases, do minor rejuggling of SYSINIT ordering to make room for or better manage events. Portions submitted by: jhb (VNET_SYSINIT), bz (cleanup) Discussed with: jhb, bz, julian, zec Reviewed by: bz Approved by: re (VIMAGE blanket)
117 lines
4.4 KiB
C
117 lines
4.4 KiB
C
/*-
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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, caddr_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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LIST_HEAD(, ifnet) ifc_iflist; /* (i) List of cloned interfaces */
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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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void vnet_if_clone_init(void);
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int if_clone_create(char *, size_t, caddr_t);
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int if_clone_destroy(const char *);
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int if_clone_destroyif(struct if_clone *, struct ifnet *);
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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, caddr_t);
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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, caddr_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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