205 lines
6.7 KiB
C
205 lines
6.7 KiB
C
/*-
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* Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _DEVICESTAT_H
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#define _DEVICESTAT_H
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#include <sys/queue.h>
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#include <sys/time.h>
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/*
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* XXX: Should really be SPECNAMELEN
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*/
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#define DEVSTAT_NAME_LEN 16
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/*
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* device name for the mmap device
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*/
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#define DEVSTAT_DEVICE_NAME "devstat"
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/*
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* ATTENTION: The devstat version below should be incremented any time a
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* change is made in struct devstat, or any time a change is made in the
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* enumerated types that struct devstat uses. (Only if those changes
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* would require a recompile -- i.e. re-arranging the order of an
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* enumerated type or something like that.) This version number is used by
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* userland utilities to determine whether or not they are in sync with the
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* kernel.
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*/
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#define DEVSTAT_VERSION 6
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/*
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* These flags specify which statistics features are supported or not
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* supported by a particular device. The default is all statistics are
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* supported.
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*/
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typedef enum {
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DEVSTAT_ALL_SUPPORTED = 0x00,
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DEVSTAT_NO_BLOCKSIZE = 0x01,
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DEVSTAT_NO_ORDERED_TAGS = 0x02,
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DEVSTAT_BS_UNAVAILABLE = 0x04
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} devstat_support_flags;
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typedef enum {
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DEVSTAT_NO_DATA = 0x00,
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DEVSTAT_READ = 0x01,
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DEVSTAT_WRITE = 0x02,
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DEVSTAT_FREE = 0x03
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} devstat_trans_flags;
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#define DEVSTAT_N_TRANS_FLAGS 4
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typedef enum {
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DEVSTAT_TAG_SIMPLE = 0x00,
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DEVSTAT_TAG_HEAD = 0x01,
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DEVSTAT_TAG_ORDERED = 0x02,
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DEVSTAT_TAG_NONE = 0x03
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} devstat_tag_type;
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typedef enum {
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DEVSTAT_PRIORITY_MIN = 0x000,
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DEVSTAT_PRIORITY_OTHER = 0x020,
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DEVSTAT_PRIORITY_PASS = 0x030,
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DEVSTAT_PRIORITY_FD = 0x040,
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DEVSTAT_PRIORITY_WFD = 0x050,
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DEVSTAT_PRIORITY_TAPE = 0x060,
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DEVSTAT_PRIORITY_CD = 0x090,
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DEVSTAT_PRIORITY_DISK = 0x110,
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DEVSTAT_PRIORITY_ARRAY = 0x120,
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DEVSTAT_PRIORITY_MAX = 0xfff
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} devstat_priority;
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/*
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* These types are intended to aid statistics gathering/display programs.
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* The first 13 types (up to the 'target' flag) are identical numerically
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* to the SCSI device type numbers. The next 3 types designate the device
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* interface. Currently the choices are IDE, SCSI, and 'other'. The last
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* flag specifies whether or not the given device is a passthrough device
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* or not. If it is a passthrough device, the lower 4 bits specify which
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* type of physical device lies under the passthrough device, and the next
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* 4 bits specify the interface.
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*/
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typedef enum {
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DEVSTAT_TYPE_DIRECT = 0x000,
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DEVSTAT_TYPE_SEQUENTIAL = 0x001,
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DEVSTAT_TYPE_PRINTER = 0x002,
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DEVSTAT_TYPE_PROCESSOR = 0x003,
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DEVSTAT_TYPE_WORM = 0x004,
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DEVSTAT_TYPE_CDROM = 0x005,
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DEVSTAT_TYPE_SCANNER = 0x006,
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DEVSTAT_TYPE_OPTICAL = 0x007,
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DEVSTAT_TYPE_CHANGER = 0x008,
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DEVSTAT_TYPE_COMM = 0x009,
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DEVSTAT_TYPE_ASC0 = 0x00a,
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DEVSTAT_TYPE_ASC1 = 0x00b,
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DEVSTAT_TYPE_STORARRAY = 0x00c,
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DEVSTAT_TYPE_ENCLOSURE = 0x00d,
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DEVSTAT_TYPE_FLOPPY = 0x00e,
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DEVSTAT_TYPE_MASK = 0x00f,
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DEVSTAT_TYPE_IF_SCSI = 0x010,
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DEVSTAT_TYPE_IF_IDE = 0x020,
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DEVSTAT_TYPE_IF_OTHER = 0x030,
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DEVSTAT_TYPE_IF_MASK = 0x0f0,
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DEVSTAT_TYPE_PASS = 0x100
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} devstat_type_flags;
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/*
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* XXX: Next revision should add
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* off_t offset[DEVSTAT_N_TRANS_FLAGS];
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* XXX: which should contain the offset of the last completed transfer.
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*/
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struct devstat {
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/* Internal house-keeping fields */
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u_int sequence0; /* Update sequence# */
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int allocated; /* Allocated entry */
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u_int start_count; /* started ops */
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u_int end_count; /* completed ops */
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struct bintime busy_from; /*
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* busy time unaccounted
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* for since this time
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*/
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STAILQ_ENTRY(devstat) dev_links;
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u_int32_t device_number; /*
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* Devstat device
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* number.
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*/
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char device_name[DEVSTAT_NAME_LEN];
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int unit_number;
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u_int64_t bytes[DEVSTAT_N_TRANS_FLAGS];
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u_int64_t operations[DEVSTAT_N_TRANS_FLAGS];
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struct bintime duration[DEVSTAT_N_TRANS_FLAGS];
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struct bintime busy_time;
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struct bintime creation_time; /*
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* Time the device was
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* created.
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*/
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u_int32_t block_size; /* Block size, bytes */
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u_int64_t tag_types[3]; /*
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* The number of
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* simple, ordered,
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* and head of queue
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* tags sent.
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*/
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devstat_support_flags flags; /*
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* Which statistics
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* are supported by a
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* given device.
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*/
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devstat_type_flags device_type; /* Device type */
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devstat_priority priority; /* Controls list pos. */
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const void *id; /*
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* Identification for
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* GEOM nodes
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*/
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u_int sequence1; /* Update sequence# */
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};
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STAILQ_HEAD(devstatlist, devstat);
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#ifdef _KERNEL
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struct bio;
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struct devstat *devstat_new_entry(const void *dev_name, int unit_number,
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u_int32_t block_size,
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devstat_support_flags flags,
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devstat_type_flags device_type,
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devstat_priority priority);
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void devstat_remove_entry(struct devstat *ds);
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void devstat_start_transaction(struct devstat *ds, struct bintime *now);
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void devstat_start_transaction_bio(struct devstat *ds, struct bio *bp);
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void devstat_end_transaction(struct devstat *ds, u_int32_t bytes,
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devstat_tag_type tag_type,
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devstat_trans_flags flags,
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struct bintime *now, struct bintime *then);
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void devstat_end_transaction_bio(struct devstat *ds, struct bio *bp);
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#endif
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#endif /* _DEVICESTAT_H */
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