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      1 /*	$NetBSD: fault.h,v 1.2 2020/06/30 16:28:17 maxv Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Maxime Villard.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_FAULT_H_
     33 #define _SYS_FAULT_H_
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_fault.h"
     37 #endif
     38 
     39 #if !defined(_KERNEL) || defined(FAULT)
     40 
     41 #define FAULT_SCOPE_GLOBAL	0
     42 #define FAULT_SCOPE_LWP		1
     43 
     44 #define FAULT_MODE_NTH_ONESHOT	0
     45 
     46 #define FAULT_NTH_MIN		2
     47 
     48 struct fault_ioc_enable {
     49 	int scope;
     50 	int mode;
     51 	union {
     52 		unsigned long nth;
     53 	};
     54 };
     55 
     56 struct fault_ioc_disable {
     57 	int scope;
     58 };
     59 
     60 struct fault_ioc_getinfo {
     61 	int scope;
     62 	unsigned long nfaults;
     63 };
     64 
     65 #define FAULT_IOC_ENABLE	_IOW ('F', 1, struct fault_ioc_enable)
     66 #define FAULT_IOC_DISABLE	_IOW ('F', 2, struct fault_ioc_disable)
     67 #define FAULT_IOC_GETINFO	_IOWR('F', 3, struct fault_ioc_getinfo)
     68 
     69 #endif /* !_KERNEL || FAULT */
     70 
     71 #ifdef _KERNEL
     72 #ifdef FAULT
     73 bool fault_inject(void);
     74 #else
     75 #define fault_inject() false
     76 #endif
     77 #endif /* _KERNEL */
     78 
     79 #endif /* !_SYS_FAULT_H_ */
     80