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devicestat.h
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devicestat.h
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/*
* Copyright (c) 1997, 1998, 1999 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: devicestat.h,v 1.3.2.1 1999/02/18 22:06:21 ken Exp $
*/
#ifndef _DEVICESTAT_H
#define _DEVICESTAT_H
#include <sys/queue.h>
#include <sys/time.h>
#define DEVSTAT_NAME_LEN 16
/*
* ATTENTION: The devstat version below should be incremented any time a
* change is made in struct devstat, or any time a change is made in the
* enumerated types that struct devstat uses. (Only if those changes
* would require a recompile -- i.e. re-arranging the order of an
* enumerated type or something like that.) This version number is used by
* userland utilities to determine whether or not they are in sync with the
* kernel.
*/
#define DEVSTAT_VERSION 3
/*
* These flags specify which statistics features are supported or not
* supported by a particular device. The default is all statistics are
* supported.
*/
typedef enum {
DEVSTAT_ALL_SUPPORTED = 0x00,
DEVSTAT_NO_BLOCKSIZE = 0x01,
DEVSTAT_NO_ORDERED_TAGS = 0x02,
DEVSTAT_BS_UNAVAILABLE = 0x04
} devstat_support_flags;
typedef enum {
DEVSTAT_NO_DATA = 0x00,
DEVSTAT_READ = 0x01,
DEVSTAT_WRITE = 0x02
} devstat_trans_flags;
typedef enum {
DEVSTAT_TAG_SIMPLE = 0x00,
DEVSTAT_TAG_HEAD = 0x01,
DEVSTAT_TAG_ORDERED = 0x02,
DEVSTAT_TAG_NONE = 0x03
} devstat_tag_type;
typedef enum {
DEVSTAT_PRIORITY_MIN = 0x000,
DEVSTAT_PRIORITY_OTHER = 0x020,
DEVSTAT_PRIORITY_PASS = 0x030,
DEVSTAT_PRIORITY_FD = 0x040,
DEVSTAT_PRIORITY_WFD = 0x050,
DEVSTAT_PRIORITY_SA = 0x060,
DEVSTAT_PRIORITY_OCD = 0x070,
DEVSTAT_PRIORITY_WCD = 0x080,
DEVSTAT_PRIORITY_CD = 0x090,
DEVSTAT_PRIORITY_WD = 0x100,
DEVSTAT_PRIORITY_DA = 0x110,
DEVSTAT_PRIORITY_CCD = 0x120,
DEVSTAT_PRIORITY_MAX = 0xfff
} devstat_priority;
/*
* These types are intended to aid statistics gathering/display programs.
* The first 13 types (up to the 'target' flag) are identical numerically
* to the SCSI device type numbers. The next 3 types designate the device
* interface. Currently the choices are IDE, SCSI, and 'other'. The last
* flag specifies whether or not the given device is a passthrough device
* or not. If it is a passthrough device, the lower 4 bits specify which
* type of physical device lies under the passthrough device, and the next
* 4 bits specify the interface.
*/
typedef enum {
DEVSTAT_TYPE_DIRECT = 0x000,
DEVSTAT_TYPE_SEQUENTIAL = 0x001,
DEVSTAT_TYPE_PRINTER = 0x002,
DEVSTAT_TYPE_PROCESSOR = 0x003,
DEVSTAT_TYPE_WORM = 0x004,
DEVSTAT_TYPE_CDROM = 0x005,
DEVSTAT_TYPE_SCANNER = 0x006,
DEVSTAT_TYPE_OPTICAL = 0x007,
DEVSTAT_TYPE_CHANGER = 0x008,
DEVSTAT_TYPE_COMM = 0x009,
DEVSTAT_TYPE_ASC0 = 0x00a,
DEVSTAT_TYPE_ASC1 = 0x00b,
DEVSTAT_TYPE_STORARRAY = 0x00c,
DEVSTAT_TYPE_ENCLOSURE = 0x00d,
DEVSTAT_TYPE_FLOPPY = 0x00e,
DEVSTAT_TYPE_MASK = 0x00f,
DEVSTAT_TYPE_IF_SCSI = 0x010,
DEVSTAT_TYPE_IF_IDE = 0x020,
DEVSTAT_TYPE_IF_OTHER = 0x030,
DEVSTAT_TYPE_IF_MASK = 0x0f0,
DEVSTAT_TYPE_PASS = 0x100
} devstat_type_flags;
struct devstat {
STAILQ_ENTRY(devstat) dev_links;
u_int32_t device_number; /*
* Devstat device
* number.
*/
char device_name[DEVSTAT_NAME_LEN];
int unit_number;
u_int64_t bytes_written; /*
* Total bytes written
* to a device.
*/
u_int64_t bytes_read; /*
* Total bytes read
* from a device.
*/
u_int64_t num_reads; /*
* Total number of
* read requests to
* the device.
*/
u_int64_t num_writes; /*
* Total number of
* write requests to
* the device.
*/
u_int64_t num_other; /*
* Total number of
* transactions that
* don't read or write
* data.
*/
int32_t busy_count; /*
* Total number of
* transactions
* outstanding for
* the device.
*/
u_int32_t block_size; /* Block size, bytes */
u_int64_t tag_types[3]; /*
* The number of
* simple, ordered,
* and head of queue
* tags sent.
*/
struct timeval dev_creation_time; /*
* Time the device was
* created.
*/
struct timeval busy_time; /*
* Total amount of
* time drive has spent
* processing requests.
*/
struct timeval start_time; /*
* The time when
* busy_count was
* last == 0. Or, the
* start of the latest
* busy period.
*/
struct timeval last_comp_time; /*
* Last time a
* transaction was
* completed.
*/
devstat_support_flags flags; /*
* Which statistics
* are supported by a
* given device.
*/
devstat_type_flags device_type; /* Device type */
devstat_priority priority; /* Controls list pos. */
};
#ifdef KERNEL
void devstat_add_entry(struct devstat *ds, const char *dev_name,
int unit_number, u_int32_t block_size,
devstat_support_flags flags,
devstat_type_flags device_type,
devstat_priority priority);
void devstat_remove_entry(struct devstat *ds);
void devstat_start_transaction(struct devstat *ds);
void devstat_end_transaction(struct devstat *ds, u_int32_t bytes,
devstat_tag_type tag_type,
devstat_trans_flags flags);
#endif
#endif /* _DEVICESTAT_H */