54366c0bd7
option, unbreak the lock tracing release semantic by embedding calls to LOCKSTAT_PROFILE_RELEASE_LOCK() direclty in the inlined version of the releasing functions for mutex, rwlock and sxlock. Failing to do so skips the lockstat_probe_func invokation for unlocking. - As part of the LOCKSTAT support is inlined in mutex operation, for kernel compiled without lock debugging options, potentially every consumer must be compiled including opt_kdtrace.h. Fix this by moving KDTRACE_HOOKS into opt_global.h and remove the dependency by opt_kdtrace.h for all files, as now only KDTRACE_FRAMES is linked there and it is only used as a compile-time stub [0]. [0] immediately shows some new bug as DTRACE-derived support for debug in sfxge is broken and it was never really tested. As it was not including correctly opt_kdtrace.h before it was never enabled so it was kept broken for a while. Fix this by using a protection stub, leaving sfxge driver authors the responsibility for fixing it appropriately [1]. Sponsored by: EMC / Isilon storage division Discussed with: rstone [0] Reported by: rstone [1] Discussed with: philip
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/*-
|
|
* Copyright (c) 2006 nCircle Network Security, Inc.
|
|
* Copyright (c) 2009 Robert N. M. Watson
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Robert N. M. Watson for the TrustedBSD
|
|
* Project under contract to nCircle Network Security, Inc.
|
|
*
|
|
* This software was developed at the University of Cambridge Computer
|
|
* Laboratory with support from a grant from Google, 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.
|
|
*
|
|
* 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, NCIRCLE NETWORK SECURITY,
|
|
* INC., 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.
|
|
*/
|
|
|
|
/*
|
|
* MAC checks for system privileges.
|
|
*/
|
|
|
|
#include "sys/cdefs.h"
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "opt_mac.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/priv.h>
|
|
#include <sys/sdt.h>
|
|
#include <sys/module.h>
|
|
|
|
#include <security/mac/mac_framework.h>
|
|
#include <security/mac/mac_internal.h>
|
|
#include <security/mac/mac_policy.h>
|
|
|
|
/*
|
|
* The MAC Framework interacts with kernel privilege checks in two ways: it
|
|
* may restrict the granting of privilege to a subject, and it may grant
|
|
* additional privileges to the subject. Policies may implement none, one,
|
|
* or both of these entry points. Restriction of privilege by any policy
|
|
* always overrides granting of privilege by any policy or other privilege
|
|
* mechanism. See kern_priv.c:priv_check_cred() for details of the
|
|
* composition.
|
|
*/
|
|
|
|
MAC_CHECK_PROBE_DEFINE2(priv_check, "struct ucred *", "int");
|
|
|
|
/*
|
|
* Restrict access to a privilege for a credential. Return failure if any
|
|
* policy denies access.
|
|
*/
|
|
int
|
|
mac_priv_check(struct ucred *cred, int priv)
|
|
{
|
|
int error;
|
|
|
|
MAC_POLICY_CHECK_NOSLEEP(priv_check, cred, priv);
|
|
MAC_CHECK_PROBE2(priv_check, error, cred, priv);
|
|
|
|
return (error);
|
|
}
|
|
|
|
MAC_GRANT_PROBE_DEFINE2(priv_grant, "struct ucred *", "int");
|
|
|
|
/*
|
|
* Grant access to a privilege for a credential. Return success if any
|
|
* policy grants access.
|
|
*/
|
|
int
|
|
mac_priv_grant(struct ucred *cred, int priv)
|
|
{
|
|
int error;
|
|
|
|
MAC_POLICY_GRANT_NOSLEEP(priv_grant, cred, priv);
|
|
MAC_GRANT_PROBE2(priv_grant, error, cred, priv);
|
|
|
|
return (error);
|
|
}
|