| 1 | /* |
| 2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 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. |
| 8 | * |
| 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. |
| 13 | * |
| 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 |
| 17 | */ |
| 18 | #ifndef __XFS_SUPPORT_KTRACE_H__ |
| 19 | #define __XFS_SUPPORT_KTRACE_H__ |
| 20 | |
| 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 { |
| 32 | int kt_nentries; /* number of entries in trace buf */ |
| 33 | atomic_t kt_index; /* current index in entries */ |
| 34 | unsigned int kt_index_mask; |
| 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 | |
| 53 | extern ktrace_t *ktrace_alloc(int, unsigned int __nocast); |
| 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__ */ |