xfs: change the xfs_iext_insert / xfs_iext_remove
[deliverable/linux.git] / fs / xfs / support / ktrace.h
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1da177e4 1/*
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2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
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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
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7 * published by the Free Software Foundation.
8 *
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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.
1da177e4 13 *
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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
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17 */
18#ifndef __XFS_SUPPORT_KTRACE_H__
19#define __XFS_SUPPORT_KTRACE_H__
20
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21/*
22 * Trace buffer entry structure.
23 */
24typedef struct ktrace_entry {
25 void *val[16];
26} ktrace_entry_t;
27
28/*
29 * Trace buffer header structure.
30 */
31typedef struct ktrace {
1da177e4 32 int kt_nentries; /* number of entries in trace buf */
6ee4752f 33 atomic_t kt_index; /* current index in entries */
d2341541 34 unsigned int kt_index_mask;
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35 int kt_rollover;
36 ktrace_entry_t *kt_entries; /* buffer of entries */
37} ktrace_t;
38
39/*
40 * Trace buffer snapshot structure.
41 */
42typedef struct ktrace_snap {
43 int ks_start; /* kt_index at time of snap */
44 int ks_index; /* current index */
45} ktrace_snap_t;
46
47
48#ifdef CONFIG_XFS_TRACE
49
50extern void ktrace_init(int zentries);
51extern void ktrace_uninit(void);
52
4750ddb0 53extern ktrace_t *ktrace_alloc(int, unsigned int __nocast);
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54extern void ktrace_free(ktrace_t *);
55
56extern void ktrace_enter(
57 ktrace_t *,
58 void *,
59 void *,
60 void *,
61 void *,
62 void *,
63 void *,
64 void *,
65 void *,
66 void *,
67 void *,
68 void *,
69 void *,
70 void *,
71 void *,
72 void *,
73 void *);
74
75extern ktrace_entry_t *ktrace_first(ktrace_t *, ktrace_snap_t *);
76extern int ktrace_nentries(ktrace_t *);
77extern ktrace_entry_t *ktrace_next(ktrace_t *, ktrace_snap_t *);
78extern ktrace_entry_t *ktrace_skip(ktrace_t *, int, ktrace_snap_t *);
79
80#else
81#define ktrace_init(x) do { } while (0)
82#define ktrace_uninit() do { } while (0)
83#endif /* CONFIG_XFS_TRACE */
84
85#endif /* __XFS_SUPPORT_KTRACE_H__ */
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