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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 | |
1da177e4 LT |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_SUPPORT_KTRACE_H__ | |
19 | #define __XFS_SUPPORT_KTRACE_H__ | |
20 | ||
1da177e4 LT |
21 | /* |
22 | * Trace buffer entry structure. | |
23 | */ | |
24 | typedef struct ktrace_entry { | |
25 | void *val[16]; | |
26 | } ktrace_entry_t; | |
27 | ||
28 | /* | |
29 | * Trace buffer header structure. | |
30 | */ | |
31 | typedef 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; |
1da177e4 LT |
35 | int kt_rollover; |
36 | ktrace_entry_t *kt_entries; /* buffer of entries */ | |
37 | } ktrace_t; | |
38 | ||
39 | /* | |
40 | * Trace buffer snapshot structure. | |
41 | */ | |
42 | typedef 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 | ||
50 | extern void ktrace_init(int zentries); | |
51 | extern void ktrace_uninit(void); | |
52 | ||
4750ddb0 | 53 | extern ktrace_t *ktrace_alloc(int, unsigned int __nocast); |
1da177e4 LT |
54 | extern void ktrace_free(ktrace_t *); |
55 | ||
56 | extern 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 | ||
75 | extern ktrace_entry_t *ktrace_first(ktrace_t *, ktrace_snap_t *); | |
76 | extern int ktrace_nentries(ktrace_t *); | |
77 | extern ktrace_entry_t *ktrace_next(ktrace_t *, ktrace_snap_t *); | |
78 | extern 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__ */ |