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opnsense-src/sys/sys/vimage.h
Bjoern A. Zeeb 71712ed6a6 For the moment disable the VIMAGE_CTASSERTs as people have trouble 
while developing and compiling with kernel options that change the
size of at least one structure. The current kernel build framework
does not allow us to pass -Dxxx to module builds so we would possibly
need a kernel option to disable the checks and that might not work
for people just building modules alone.

For now they helped to identify possibly API problems and bring
those back into minds of developers seeking for better solutions.

Problems reported by:	kib, warner
Reviewed by:		warner
2009-03-03 19:38:56 +00:00

242 lines
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/*-
* Copyright (c) 2006-2008 University of Zagreb
* Copyright (c) 2006-2008 FreeBSD Foundation
*
* This software was developed by the University of Zagreb and the
* FreeBSD Foundation under sponsorship by the Stichting NLnet and the
* FreeBSD Foundation.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* $FreeBSD$
*/
#ifndef _SYS_VIMAGE_H_
#define _SYS_VIMAGE_H_
#include <sys/queue.h>
struct kld_sym_lookup;
struct vnet_symmap {
char *name;
void *base;
size_t size;
};
struct vnet_modinfo {
char *vmi_name;
struct vnet_symmap *vmi_symmap;
};
struct vnet_modlink {
TAILQ_ENTRY(vnet_modlink) vml_mod_le;
const struct vnet_modinfo *vml_modinfo;
};
#define VNET_MOD_DECLARE(m_name_uc, m_name_lc, m_iattach, m_idetach, \
m_dependson, m_symmap) \
static const struct vnet_modinfo vnet_##m_name_lc##_modinfo = { \
.vmi_name = #m_name_lc, \
.vmi_symmap = m_symmap \
};
#if defined(VIMAGE) && defined(VIMAGE_GLOBALS)
#error "You cannot have both option VIMAGE and option VIMAGE_GLOBALS!"
#endif
#ifdef VIMAGE_GLOBALS
#define VSYM(base, sym) (sym)
#else
#ifdef VIMAGE
#error "No option VIMAGE yet!"
#else
#define VSYM(base, sym) (base ## _0._ ## sym)
#endif
#endif
#define VNET_SYMMAP(mod, name) \
{ #name, &(vnet_ ## mod ## _0._ ## name), \
sizeof(vnet_ ## mod ## _0._ ## name) }
#define VNET_SYMMAP_END { NULL, 0 }
/* Non-VIMAGE null-macros */
#define CURVNET_SET(arg)
#define CURVNET_SET_QUIET(arg)
#define CURVNET_RESTORE()
#define VNET_ASSERT(condition)
#define INIT_FROM_VNET(vnet, modindex, modtype, sym)
#define VNET_ITERATOR_DECL(arg)
#define VNET_FOREACH(arg)
#define VNET_LIST_RLOCK()
#define VNET_LIST_RUNLOCK()
#define INIT_VPROCG(arg)
#define INIT_VCPU(arg)
#define TD_TO_VIMAGE(td)
#define TD_TO_VNET(td)
#define TD_TO_VPROCG(td)
#define TD_TO_VCPU(td)
#define P_TO_VIMAGE(p)
#define P_TO_VNET(p)
#define P_TO_VPROCG(p)
#define P_TO_VCPU(p)
/* XXX those defines bellow should probably go into vprocg.h and vcpu.h */
#define VPROCG(sym) (sym)
#define VCPU(sym) (sym)
#define V_hostname VPROCG(hostname)
#define G_hostname VPROCG(hostname) /* global hostname */
#define V_domainname VPROCG(domainname)
int vi_symlookup(struct kld_sym_lookup *, char *);
void vnet_mod_register(const struct vnet_modinfo *);
/*
* Size-guards for the vimage structures.
* If you need to update the values you MUST increment __FreeBSD_version.
* See description further down to see how to get the new values.
*/
#ifdef __amd64__
#define SIZEOF_vnet_net 464
#define SIZEOF_vnet_net_LINT 5144
#define SIZEOF_vnet_inet 4160
#define SIZEOF_vnet_inet6 8800
#define SIZEOF_vnet_ipsec 31160
#endif
#ifdef __arm__
#define SIZEOF_vnet_net 236
#define SIZEOF_vnet_net_LINT 1 /* No LINT kernel yet. */
#define SIZEOF_vnet_inet 2396
#define SIZEOF_vnet_inet6 8536
#define SIZEOF_vnet_ipsec 1
#endif
#ifdef __i386__ /* incl. pc98 */
#define SIZEOF_vnet_net 236
#define SIZEOF_vnet_net_LINT 2576
#define SIZEOF_vnet_inet 2396
#define SIZEOF_vnet_inet6 8528
#define SIZEOF_vnet_ipsec 31016
#endif
#ifdef __ia64__
#define SIZEOF_vnet_net 464
#define SIZEOF_vnet_net_LINT 5144
#define SIZEOF_vnet_inet 4160
#define SIZEOF_vnet_inet6 8800
#define SIZEOF_vnet_ipsec 31160
#endif
#ifdef __mips__
#define SIZEOF_vnet_net 236
#define SIZEOF_vnet_net_LINT 1 /* No LINT kernel yet. */
#define SIZEOF_vnet_inet 2432
#define SIZEOF_vnet_inet6 8552
#define SIZEOF_vnet_ipsec 1
#endif
#ifdef __powerpc__
#define SIZEOF_vnet_net 236
#define SIZEOF_vnet_net_LINT 2576
#define SIZEOF_vnet_inet 2432
#define SIZEOF_vnet_inet6 8536
#define SIZEOF_vnet_ipsec 31048
#endif
#ifdef __sparc64__ /* incl. sun4v */
#define SIZEOF_vnet_net 464
#define SIZEOF_vnet_net_LINT 5144
#define SIZEOF_vnet_inet 4160
#define SIZEOF_vnet_inet6 8800
#define SIZEOF_vnet_ipsec 31160
#endif
#ifdef COMPILING_LINT
#undef SIZEOF_vnet_net
#define SIZEOF_vnet_net SIZEOF_vnet_net_LINT
#endif
#ifndef SIZEOF_vnet_net
#error "SIZEOF_vnet_net no defined for this architecture."
#endif
#ifndef SIZEOF_vnet_inet
#error "SIZEOF_vnet_inet no defined for this architecture."
#endif
#ifndef SIZEOF_vnet_inet6
#error "SIZEOF_vnet_inet6 no defined for this architecture."
#endif
#ifndef SIZEOF_vnet_ipsec
#error "SIZEOF_vnet_ipsec no defined for this architecture."
#endif
/*
* x must be a positive integer constant (expected value),
* y must be compile-time evaluated to a positive integer,
* e.g. CTASSERT_EQUAL(FOO_EXPECTED_SIZE, sizeof (struct foo));
* One needs to compile with -Wuninitialized and thus at least -O
* for this to trigger and -Werror if it should be fatal.
*/
#define CTASSERT_EQUAL(x, y) \
static int __attribute__((__used__)) \
__attribute__((__section__(".debug_ctassert_equal"))) \
__CONCAT(__ctassert_equal_at_line_, __LINE__)(void); \
\
static int __attribute__((__used__)) \
__attribute__((__section__(".debug_ctassert_equal"))) \
__CONCAT(__ctassert_equal_at_line_, __LINE__)(void) \
{ \
int __CONCAT(__CONCAT(__expected_, x), \
_but_got)[(y) + (x)]; \
__CONCAT(__CONCAT(__expected_, x), _but_got)[(x)] = 1; \
return (__CONCAT(__CONCAT(__expected_, x), \
_but_got)[(y)]); \
} \
struct __hack
/*
* x shall be the expected value (SIZEOF_vnet_* from above)
* and y shall be the real size (sizeof(struct vnet_*)).
* If you run into the CTASSERT() you want to compile a universe
* with COPTFLAGS+="-O -Wuninitialized -DVIMAGE_CHECK_SIZES".
* This should give you the errors for the proper values defined above.
* Make sure to re-run universe with the proper values afterwards -
* -DMAKE_JUST_KERNELS should be enough.
*
* Note:
* CTASSERT() takes precedence in the current FreeBSD world thus the
* CTASSERT_EQUAL() will not neccessarily trigger if one uses both.
* But as CTASSERT_EQUAL() needs special compile time options, we
* want the default case to be backed by CTASSERT().
*/
#if 0
#ifndef VIMAGE_CTASSERT
#ifdef VIMAGE_CHECK_SIZES
#define VIMAGE_CTASSERT(x, y) \
CTASSERT_EQUAL(x, y)
#else
#define VIMAGE_CTASSERT(x, y) \
CTASSERT_EQUAL(x, y); \
CTASSERT(x == 0 || x == y)
#endif
#endif
#else
#define VIMAGE_CTASSERT(x, y) struct __hack
#endif
#endif /* !_SYS_VIMAGE_H_ */
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