bc29160df3
Vnet modules and protocol domains may now register destructor functions to clean up and release per-module state. The destructor mechanisms can be triggered by invoking "vimage -d", or a future equivalent command which will be provided via the new jail framework. While this patch introduces numerous placeholder destructor functions, many of those are currently incomplete, thus leaking memory or (even worse) failing to stop all running timers. Many of such issues are already known and will be incrementaly fixed over the next weeks in smaller incremental commits. Apart from introducing new fields in structs ifnet, domain, protosw and vnet_net, which requires the kernel and modules to be rebuilt, this change should have no impact on nooptions VIMAGE builds, since vnet destructors can only be called in VIMAGE kernels. Moreover, destructor functions should be in general compiled in only in options VIMAGE builds, except for kernel modules which can be safely kldunloaded at run time. Bump __FreeBSD_version to 800097. Reviewed by: bz, julian Approved by: rwatson, kib (re), julian (mentor)
87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
/*-
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* Copyright (c) 1982, 1986, 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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* @(#)domain.h 8.1 (Berkeley) 6/2/93
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* $FreeBSD$
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*/
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#ifndef _SYS_DOMAIN_H_
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#define _SYS_DOMAIN_H_
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/*
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* Structure per communications domain.
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*/
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/*
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* Forward structure declarations for function prototypes [sic].
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*/
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struct mbuf;
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struct ifnet;
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struct domain {
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int dom_family; /* AF_xxx */
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char *dom_name;
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void (*dom_init) /* initialize domain data structures */
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(void);
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void (*dom_destroy) /* cleanup structures / state */
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(void);
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int (*dom_externalize) /* externalize access rights */
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(struct mbuf *, struct mbuf **);
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void (*dom_dispose) /* dispose of internalized rights */
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(struct mbuf *);
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struct protosw *dom_protosw, *dom_protoswNPROTOSW;
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struct domain *dom_next;
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int (*dom_rtattach) /* initialize routing table */
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(void **, int);
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int (*dom_rtdetach) /* clean up routing table */
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(void **, int);
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int dom_rtoffset; /* an arg to rtattach, in bits */
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/* XXX MRT.
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* rtoffset May be 0 if the domain supplies its own rtattach(),
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* in which case, a 0 indicates it's being called from
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* vfs_export.c (HACK) Only for AF_INET{,6} at this time.
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* Temporary ABI compat hack.. fix post RELENG_7
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*/
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int dom_maxrtkey; /* for routing layer */
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void *(*dom_ifattach)(struct ifnet *);
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void (*dom_ifdetach)(struct ifnet *, void *);
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/* af-dependent data on ifnet */
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};
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#ifdef _KERNEL
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extern int domain_init_status;
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extern struct domain *domains;
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extern void net_add_domain(void *);
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#define DOMAIN_SET(name) \
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SYSINIT(domain_ ## name, SI_SUB_PROTO_DOMAIN, SI_ORDER_SECOND, net_add_domain, & name ## domain)
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#endif
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#endif
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