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/*
* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
* All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#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_TRACE
extern 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__ */
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