devstat.h revision 175861 
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: head/lib/libdevstat/devstat.h 175861 2008-01-31 16:55:12Z jhb $
29 */
30
31#ifndef _DEVSTAT_H
32#define _DEVSTAT_H
33#include <sys/cdefs.h>
34#include <sys/devicestat.h>
35#include <sys/resource.h>
36
37#include <kvm.h>
38
39/*
40 * Bumped every time we change the userland API.  Hopefully this doesn't
41 * happen very often!  This should be bumped every time we have to
42 * increment SHLIB_MAJOR in the libdevstat Makefile (for non-backwards
43 * compatible API changes) and should also be bumped every time we make
44 * backwards-compatible API changes, so application writers have a way to
45 * determine when a particular feature is available.
46 */
47#define	DEVSTAT_USER_API_VER	6
48
49#define DEVSTAT_ERRBUF_SIZE  2048 /* size of the devstat library error string */
50
51extern char devstat_errbuf[];
52
53typedef enum {
54	DEVSTAT_MATCH_NONE	= 0x00,
55	DEVSTAT_MATCH_TYPE	= 0x01,
56	DEVSTAT_MATCH_IF	= 0x02,
57	DEVSTAT_MATCH_PASS	= 0x04
58} devstat_match_flags;
59
60typedef enum {
61	DSM_NONE,
62	DSM_TOTAL_BYTES,
63	DSM_TOTAL_BYTES_READ,
64	DSM_TOTAL_BYTES_WRITE,
65	DSM_TOTAL_TRANSFERS,
66	DSM_TOTAL_TRANSFERS_READ,
67	DSM_TOTAL_TRANSFERS_WRITE,
68	DSM_TOTAL_TRANSFERS_OTHER,
69	DSM_TOTAL_BLOCKS,
70	DSM_TOTAL_BLOCKS_READ,
71	DSM_TOTAL_BLOCKS_WRITE,
72	DSM_KB_PER_TRANSFER,
73	DSM_KB_PER_TRANSFER_READ,
74	DSM_KB_PER_TRANSFER_WRITE,
75	DSM_TRANSFERS_PER_SECOND,
76	DSM_TRANSFERS_PER_SECOND_READ,
77	DSM_TRANSFERS_PER_SECOND_WRITE,
78	DSM_TRANSFERS_PER_SECOND_OTHER,
79	DSM_MB_PER_SECOND,
80	DSM_MB_PER_SECOND_READ,
81	DSM_MB_PER_SECOND_WRITE,
82	DSM_BLOCKS_PER_SECOND,
83	DSM_BLOCKS_PER_SECOND_READ,
84	DSM_BLOCKS_PER_SECOND_WRITE,
85	DSM_MS_PER_TRANSACTION,
86	DSM_MS_PER_TRANSACTION_READ,
87	DSM_MS_PER_TRANSACTION_WRITE,
88	DSM_SKIP,
89	DSM_TOTAL_BYTES_FREE,
90	DSM_TOTAL_TRANSFERS_FREE,
91	DSM_TOTAL_BLOCKS_FREE,
92	DSM_KB_PER_TRANSFER_FREE,
93	DSM_MB_PER_SECOND_FREE,
94	DSM_TRANSFERS_PER_SECOND_FREE,
95	DSM_BLOCKS_PER_SECOND_FREE,
96	DSM_MS_PER_TRANSACTION_OTHER,
97	DSM_MS_PER_TRANSACTION_FREE,
98	DSM_BUSY_PCT,
99	DSM_QUEUE_LENGTH,
100	DSM_MAX
101} devstat_metric;
102
103struct devstat_match {
104	devstat_match_flags	match_fields;
105	devstat_type_flags	device_type;
106	int			num_match_categories;
107};
108
109struct devstat_match_table {
110	const char *		match_str;
111	devstat_type_flags	type;
112	devstat_match_flags	match_field;
113};
114
115struct device_selection {
116	u_int32_t	device_number;
117	char		device_name[DEVSTAT_NAME_LEN];
118	int		unit_number;
119	int		selected;
120	u_int64_t	bytes;
121	int		position;
122};
123
124struct devinfo {
125	struct devstat	*devices;
126	u_int8_t	*mem_ptr;
127	long		generation;
128	int		numdevs;
129};
130
131struct statinfo {
132	long		cp_time[CPUSTATES];
133	long		tk_nin;
134	long		tk_nout;
135	struct devinfo	*dinfo;
136	long double 	snap_time;
137};
138
139typedef enum {
140	DS_SELECT_ADD,
141	DS_SELECT_ONLY,
142	DS_SELECT_REMOVE,
143	DS_SELECT_ADDONLY
144} devstat_select_mode;
145
146__BEGIN_DECLS
147
148int devstat_getnumdevs(kvm_t *kd);
149long devstat_getgeneration(kvm_t *kd);
150int devstat_getversion(kvm_t *kd);
151int devstat_checkversion(kvm_t *kd);
152int devstat_getdevs(kvm_t *kd, struct statinfo *stats);
153int devstat_selectdevs(struct device_selection **dev_select, int *num_selected,
154		       int *num_selections, long *select_generation,
155		       long current_generation, struct devstat *devices,
156		       int numdevs, struct devstat_match *matches,
157		       int num_matches, char **dev_selections,
158		       int num_dev_selections, devstat_select_mode select_mode,
159		       int maxshowdevs, int perf_select);
160int devstat_buildmatch(char *match_str, struct devstat_match **matches,
161		       int *num_matches);
162int devstat_compute_statistics(struct devstat *current,
163			       struct devstat *previous,
164			       long double etime, ...);
165long double devstat_compute_etime(struct bintime *cur_time,
166				  struct bintime *prev_time);
167__END_DECLS
168
169#endif /* _DEVSTAT_H  */
170