2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 #ifndef __XFS_SUPPORT_KTRACE_H__
19 #define __XFS_SUPPORT_KTRACE_H__
22 * Trace buffer entry structure.
24 typedef struct ktrace_entry {
29 * Trace buffer header structure.
31 typedef struct ktrace {
32 int kt_nentries; /* number of entries in trace buf */
33 atomic_t kt_index; /* current index in entries */
35 ktrace_entry_t *kt_entries; /* buffer of entries */
39 * Trace buffer snapshot structure.
41 typedef struct ktrace_snap {
42 int ks_start; /* kt_index at time of snap */
43 int ks_index; /* current index */
47 #ifdef CONFIG_XFS_TRACE
49 extern void ktrace_init(int zentries);
50 extern void ktrace_uninit(void);
52 extern ktrace_t *ktrace_alloc(int, unsigned int __nocast);
53 extern void ktrace_free(ktrace_t *);
55 extern void ktrace_enter(
74 extern ktrace_entry_t *ktrace_first(ktrace_t *, ktrace_snap_t *);
75 extern int ktrace_nentries(ktrace_t *);
76 extern ktrace_entry_t *ktrace_next(ktrace_t *, ktrace_snap_t *);
77 extern ktrace_entry_t *ktrace_skip(ktrace_t *, int, ktrace_snap_t *);
80 #define ktrace_init(x) do { } while (0)
81 #define ktrace_uninit() do { } while (0)
82 #endif /* CONFIG_XFS_TRACE */
84 #endif /* __XFS_SUPPORT_KTRACE_H__ */