/* * 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. * * $FreeBSD: src/sys/sys/devicestat.h,v 1.9 1999/12/29 04:24:39 peter Exp $ */ #ifndef _SYS_DEVICESTAT_H_ #define _SYS_DEVICESTAT_H_ #include <sys/queue.h> #include <sys/time.h> #include <sys/types.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 4 /* * 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_FREE = 0x03 } 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_TAPE = 0x060, DEVSTAT_PRIORITY_CD = 0x090, DEVSTAT_PRIORITY_DISK = 0x110, DEVSTAT_PRIORITY_ARRAY = 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_read; /* * Total bytes read * from a device. */ u_int64_t bytes_written; /* * Total bytes written * to a device. */ u_int64_t bytes_freed; /* * Total bytes freed * 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_frees; /* * Total number of * free 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 struct buf; 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); void devstat_end_transaction_buf(struct devstat *ds, struct buf *); #endif #endif /* !_SYS_DEVICESTAT_H_ */
