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#include <spin.h> 22 23/* 24 * Trace buffer entry structure. 25 */ 26typedef struct ktrace_entry { 27 void *val[16]; 28} ktrace_entry_t; 29 30/* 31 * Trace buffer header structure. 32 */ 33typedef struct ktrace { 34 lock_t kt_lock; /* mutex to guard counters */ 35 int kt_nentries; /* number of entries in trace buf */ 36 int kt_index; /* current index in entries */ 37 int kt_rollover; 38 ktrace_entry_t *kt_entries; /* buffer of entries */ 39} ktrace_t; 40 41/* 42 * Trace buffer snapshot structure. 43 */ 44typedef struct ktrace_snap { 45 int ks_start; /* kt_index at time of snap */ 46 int ks_index; /* current index */ 47} ktrace_snap_t; 48 49 50#ifdef CONFIG_XFS_TRACE 51 52extern void ktrace_init(int zentries); 53extern void ktrace_uninit(void); 54 55extern ktrace_t *ktrace_alloc(int, unsigned int __nocast); 56extern void ktrace_free(ktrace_t *); 57 58extern void ktrace_enter( 59 ktrace_t *, 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 void *, 75 void *); 76 77extern ktrace_entry_t *ktrace_first(ktrace_t *, ktrace_snap_t *); 78extern int ktrace_nentries(ktrace_t *); 79extern ktrace_entry_t *ktrace_next(ktrace_t *, ktrace_snap_t *); 80extern ktrace_entry_t *ktrace_skip(ktrace_t *, int, ktrace_snap_t *); 81 82#else 83#define ktrace_init(x) do { } while (0) 84#define ktrace_uninit() do { } while (0) 85#endif /* CONFIG_XFS_TRACE */ 86 87#endif /* __XFS_SUPPORT_KTRACE_H__ */ 88