lib/libdevstat/devstat.h

   1 /*
   2  * Copyright (c) 1997, 1998 Kenneth D. Merry.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/lib/libdevstat/devstat.h,v 1.3 1999/08/28 00:04:27 peter Exp $
  29  * $DragonFly: src/lib/libdevstat/devstat.h,v 1.4 2005/01/08 19:19:26 joerg Exp $
  30  */
  31
  32 #ifndef _DEVSTAT_H
  33 #define _DEVSTAT_H
  34 #include <sys/cdefs.h>
  35 #include <sys/devicestat.h>
  36
  37 #define DEVSTAT_ERRBUF_SIZE  2048 /* size of the devstat library error string */
  38
  39 extern char devstat_errbuf[];
  40
  41 typedef enum {
  42         DEVSTAT_MATCH_NONE      = 0x00,
  43         DEVSTAT_MATCH_TYPE      = 0x01,
  44         DEVSTAT_MATCH_IF        = 0x02,
  45         DEVSTAT_MATCH_PASS      = 0x04
  46 } devstat_match_flags;
  47
  48 struct devstat_match {
  49         devstat_match_flags     match_fields;
  50         devstat_type_flags      device_type;
  51         int                     num_match_categories;
  52 };
  53
  54 struct devstat_match_table {
  55         char                    *match_str;
  56         devstat_type_flags      type;
  57         devstat_match_flags     match_field;
  58 };
  59
  60 struct device_selection {
  61         u_int32_t       device_number;
  62         char            device_name[DEVSTAT_NAME_LEN];
  63         int             unit_number;
  64         int             selected;
  65         u_int64_t       bytes;
  66         int             position;
  67 };
  68
  69 struct devinfo {
  70         struct devstat  *devices;
  71         u_int8_t        *mem_ptr;
  72         long            generation;
  73         int             numdevs;
  74 };
  75
  76 struct statinfo {
  77         struct devinfo  *dinfo;
  78         struct timeval  busy_time;
  79 };
  80
  81 typedef enum {
  82         DS_SELECT_ADD,
  83         DS_SELECT_ONLY,
  84         DS_SELECT_REMOVE,
  85         DS_SELECT_ADDONLY
  86 } devstat_select_mode;
  87
  88 __BEGIN_DECLS
  89 int getnumdevs(void);
  90 long getgeneration(void);
  91 int getversion(void);
  92 int checkversion(void);
  93 int getdevs(struct statinfo *stats);
  94 int selectdevs(struct device_selection **dev_select, int *num_selected,
  95                int *num_selections, long *select_generation,
  96                long current_generation, struct devstat *devices, int numdevs,
  97                struct devstat_match *matches, int num_matches,
  98                char **dev_selections, int num_dev_selections,
  99                devstat_select_mode select_mode, int maxshowdevs,
 100                int perf_select);
 101 int buildmatch(const char *match_str, struct devstat_match **matches,
 102                int *num_matches);
 103 int compute_stats(struct devstat *current, struct devstat *previous,
 104                   long double etime, u_int64_t *total_bytes,
 105                   u_int64_t *total_transfers, u_int64_t *total_blocks,
 106                   long double *kb_per_transfer,
 107                   long double *transfers_per_second, long double *mb_per_second,
 108                   long double *blocks_per_second,
 109                   long double *ms_per_transaction);
 110 long double compute_etime(struct timeval cur_time, struct timeval prev_time);
 111 __END_DECLS
 112
 113 #endif /* _DEVSTAT_H  */