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