| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write the Free Software Foundation, Inc., 59 |
| 21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| 22 | * |
| 23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, |
| 24 | * Mountain View, CA 94043, or: |
| 25 | * |
| 26 | * http://www.sgi.com |
| 27 | * |
| 28 | * For further information regarding this notice, see: |
| 29 | * |
| 30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ |
| 31 | */ |
| 32 | #ifndef __XFS_SUPPORT_KTRACE_H__ |
| 33 | #define __XFS_SUPPORT_KTRACE_H__ |
| 34 | |
| 35 | #include <spin.h> |
| 36 | |
| 37 | /* |
| 38 | * Trace buffer entry structure. |
| 39 | */ |
| 40 | typedef struct ktrace_entry { |
| 41 | void *val[16]; |
| 42 | } ktrace_entry_t; |
| 43 | |
| 44 | /* |
| 45 | * Trace buffer header structure. |
| 46 | */ |
| 47 | typedef struct ktrace { |
| 48 | lock_t kt_lock; /* mutex to guard counters */ |
| 49 | int kt_nentries; /* number of entries in trace buf */ |
| 50 | int kt_index; /* current index in entries */ |
| 51 | int kt_rollover; |
| 52 | ktrace_entry_t *kt_entries; /* buffer of entries */ |
| 53 | } ktrace_t; |
| 54 | |
| 55 | /* |
| 56 | * Trace buffer snapshot structure. |
| 57 | */ |
| 58 | typedef struct ktrace_snap { |
| 59 | int ks_start; /* kt_index at time of snap */ |
| 60 | int ks_index; /* current index */ |
| 61 | } ktrace_snap_t; |
| 62 | |
| 63 | |
| 64 | #ifdef CONFIG_XFS_TRACE |
| 65 | |
| 66 | extern void ktrace_init(int zentries); |
| 67 | extern void ktrace_uninit(void); |
| 68 | |
| 69 | extern ktrace_t *ktrace_alloc(int, int); |
| 70 | extern void ktrace_free(ktrace_t *); |
| 71 | |
| 72 | extern void ktrace_enter( |
| 73 | ktrace_t *, |
| 74 | void *, |
| 75 | void *, |
| 76 | void *, |
| 77 | void *, |
| 78 | void *, |
| 79 | void *, |
| 80 | void *, |
| 81 | void *, |
| 82 | void *, |
| 83 | void *, |
| 84 | void *, |
| 85 | void *, |
| 86 | void *, |
| 87 | void *, |
| 88 | void *, |
| 89 | void *); |
| 90 | |
| 91 | extern ktrace_entry_t *ktrace_first(ktrace_t *, ktrace_snap_t *); |
| 92 | extern int ktrace_nentries(ktrace_t *); |
| 93 | extern ktrace_entry_t *ktrace_next(ktrace_t *, ktrace_snap_t *); |
| 94 | extern ktrace_entry_t *ktrace_skip(ktrace_t *, int, ktrace_snap_t *); |
| 95 | |
| 96 | #else |
| 97 | #define ktrace_init(x) do { } while (0) |
| 98 | #define ktrace_uninit() do { } while (0) |
| 99 | #endif /* CONFIG_XFS_TRACE */ |
| 100 | |
| 101 | #endif /* __XFS_SUPPORT_KTRACE_H__ */ |