/* * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * Further, this software is distributed without any warranty that it is * free of the rightful claim of any third person regarding infringement * or the like.  Any license provided herein, whether implied or * otherwise, applies only to this software file.  Patent licenses, if * any, provided herein do not apply to combinations of this program with * other software, or any other product whatsoever. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston MA 02111-1307, USA. * * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, * Mountain View, CA  94043, or: * * http://www.sgi.com * * For further information regarding this notice, see: * * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ */#ifndef __XFS_SUPPORT_KTRACE_H__#define __XFS_SUPPORT_KTRACE_H__#include <spin.h>/* * Trace buffer entry structure. */typedef struct ktrace_entry {	void	*val[16];} ktrace_entry_t;/* * Trace buffer header structure. */typedef struct ktrace {	lock_t		kt_lock;	/* mutex to guard counters */	int		kt_nentries;	/* number of entries in trace buf */	int		kt_index;	/* current index in entries */	int		kt_rollover;	ktrace_entry_t	*kt_entries;	/* buffer of entries */} ktrace_t;/* * Trace buffer snapshot structure. */typedef struct ktrace_snap {	int		ks_start;	/* kt_index at time of snap */	int		ks_index;	/* current index */} ktrace_snap_t;#ifdef CONFIG_XFS_TRACEextern void ktrace_init(int zentries);extern void ktrace_uninit(void);extern ktrace_t *ktrace_alloc(int, int);extern void ktrace_free(ktrace_t *);extern void ktrace_enter(	ktrace_t	*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*,	void		*);extern ktrace_entry_t   *ktrace_first(ktrace_t *, ktrace_snap_t *);extern int              ktrace_nentries(ktrace_t *);extern ktrace_entry_t   *ktrace_next(ktrace_t *, ktrace_snap_t *);extern ktrace_entry_t   *ktrace_skip(ktrace_t *, int, ktrace_snap_t *);#else#define ktrace_init(x)	do { } while (0)#define ktrace_uninit()	do { } while (0)#endif	/* CONFIG_XFS_TRACE */#endif	/* __XFS_SUPPORT_KTRACE_H__ */