Device statistics library. Used by iostat, vmstat, and systat to

format and analyze the output of the new device statistics sysctls.

Submitted by:	"Kenneth D. Merry" <ken@FreeBSD.org>

1 files changed, 115 insertions, 0 deletions

diff --git a/lib/libdevstat/devstat.h b/lib/libdevstat/devstat.h
new file mode 100644
index 0000000..b2f1543
--- /dev/null
+++ b/lib/libdevstat/devstat.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 1997, 1998 Kenneth D. Merry.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	$Id$
+ */
+
+#ifndef _DEVSTAT_H
+#define _DEVSTAT_H
+#include <sys/cdefs.h>
+#include <sys/devicestat.h>
+
+#define DEVSTAT_ERRBUF_SIZE  2048 /* size of the devstat library error string */
+
+extern char devstat_errbuf[];
+
+typedef enum {
+	DEVSTAT_MATCH_NONE	= 0x00,
+	DEVSTAT_MATCH_TYPE	= 0x01,
+	DEVSTAT_MATCH_IF	= 0x02,
+	DEVSTAT_MATCH_PASS	= 0x04
+} devstat_match_flags;
+
+struct devstat_match {
+	devstat_match_flags	match_fields;
+	devstat_type_flags	device_type;
+	int			num_match_categories;
+};
+
+struct devstat_match_table {
+	char 			*match_str;
+	devstat_type_flags	type;
+	devstat_match_flags	match_field;
+};
+
+struct device_selection {
+	u_int32_t	device_number;
+	char		device_name[DEVSTAT_NAME_LEN];
+	int		unit_number;
+	int		selected;
+	u_int64_t	bytes;
+	int		position;
+};
+
+struct devinfo {
+	struct devstat	*devices;
+	u_int8_t	*mem_ptr;
+	int		generation;
+	int		numdevs;
+};
+
+struct statinfo {
+	long		cp_time[CPUSTATES];
+	long		tk_nin;
+	long		tk_nout;
+	struct devinfo	*dinfo;
+	struct timeval	busy_time;
+};
+
+typedef enum {
+	DS_SELECT_ADD,
+	DS_SELECT_ONLY,
+	DS_SELECT_REMOVE,
+	DS_SELECT_ADDONLY
+} devstat_select_mode;
+
+__BEGIN_DECLS
+int getnumdevs(void);
+int getgeneration(void);
+int getversion(void);
+int checkversion(void);
+int getdevs(struct statinfo *stats);
+int selectdevs(struct device_selection **dev_select, int *num_selected,
+	       int *num_selections, int *select_generation, 
+	       int current_generation, struct devstat *devices, int numdevs,
+	       struct devstat_match *matches, int num_matches,
+	       char **dev_selections, int num_dev_selections,
+	       devstat_select_mode select_mode, int maxshowdevs,
+	       int perf_select);
+int buildmatch(char *match_str, struct devstat_match **matches,
+	       int *num_matches);
+int compute_stats(struct devstat *current, struct devstat *previous,
+		  long double etime, u_int64_t *total_bytes,
+		  u_int64_t *total_transfers, u_int64_t *total_blocks,
+		  long double *kb_per_transfer,
+		  long double *transfers_per_second, long double *mb_per_second,
+		  long double *blocks_per_second,
+		  long double *ms_per_transaction);
+long double compute_etime(struct timeval cur_time, struct timeval prev_time);
+__END_DECLS
+
+#endif /* _DEVSTAT_H  */