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/* $OpenBSD: disk.h,v 1.36 2017/05/04 22:47:27 deraadt Exp $ */
/* $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $ */
/*
* Copyright (c) 1995 Jason R. Thorpe. All rights reserved.
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
*
* @(#)disk.h 8.1 (Berkeley) 6/2/93
*/
/*
* Disk device structures.
*/
#include <sys/device.h>
#include <sys/time.h>
#include <sys/queue.h>
#include <sys/rwlock.h>
#include <sys/mutex.h>
struct buf;
struct disklabel;
#define DS_DISKNAMELEN 16
struct diskstats {
char ds_name[DS_DISKNAMELEN];
int ds_busy; /* busy counter */
u_int64_t ds_rxfer; /* total number of read transfers */
u_int64_t ds_wxfer; /* total number of write transfers */
u_int64_t ds_seek; /* total independent seek operations */
u_int64_t ds_rbytes; /* total bytes read */
u_int64_t ds_wbytes; /* total bytes written */
struct timeval ds_attachtime; /* time disk was attached */
struct timeval ds_timestamp; /* time of first busy or any unbusy */
struct timeval ds_time; /* total time spent busy */
};
struct disk {
TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
struct rwlock dk_lock; /* disk lock */
struct mutex dk_mtx; /* busy/unbusy mtx */
char *dk_name; /* disk name */
struct device *dk_device; /* disk device structure. */
dev_t dk_devno; /* disk device number. */
int dk_flags; /* disk flags */
#define DKF_CONSTRUCTED 0x0001
#define DKF_OPENED 0x0002
#define DKF_NOLABELREAD 0x0004
#define DKF_LABELVALID 0x0008
/*
* Metrics data; note that some metrics may have no meaning
* on certain types of disks.
*/
int dk_busy; /* busy counter */
u_int64_t dk_rxfer; /* total number of read transfers */
u_int64_t dk_wxfer; /* total number of write transfers */
u_int64_t dk_seek; /* total independent seek operations */
u_int64_t dk_rbytes; /* total bytes read */
u_int64_t dk_wbytes; /* total bytes written */
struct timeval dk_attachtime; /* time disk was attached */
struct timeval dk_timestamp; /* time of first busy or any unbusy */
struct timeval dk_time; /* total time spent busy */
int dk_bopenmask; /* block devices open */
int dk_copenmask; /* character devices open */
int dk_openmask; /* composite (bopen|copen) */
int dk_state; /* label state ### */
int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/
int dk_byteshift; /* shift to convert bytes to blks */
/*
* Disk label information. Storage for the in-core disk label
* must be dynamically allocated, otherwise the size of this
* structure becomes machine-dependent.
*/
struct disklabel *dk_label;
};
/* states */
#define DK_CLOSED 0 /* drive is closed */
#define DK_WANTOPEN 1 /* drive being opened */
#define DK_WANTOPENRAW 2 /* drive being opened */
#define DK_RDLABEL 3 /* label being read */
#define DK_OPEN 4 /* label read, drive open */
#define DK_OPENRAW 5 /* open without label */
/* Disk map flags. */
#define DM_OPENPART 0x1 /* Open raw partition. */
#define DM_OPENBLCK 0x2 /* Open block device. */
/*
* disklist_head is defined here so that user-land has access to it.
*/
TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
#ifdef _KERNEL
extern struct disklist_head disklist; /* list of disks attached to system */
extern int disk_count; /* number of disks in global disklist */
extern int disk_change; /* disk attached/detached */
void disk_init(void);
int disk_construct(struct disk *);
void disk_attach(struct device *, struct disk *);
void disk_detach(struct disk *);
int disk_openpart(struct disk *, int, int, int);
void disk_closepart(struct disk *, int, int);
void disk_gone(int (*)(dev_t, int, int, struct proc *), int);
void disk_busy(struct disk *);
void disk_unbusy(struct disk *, long, daddr_t, int);
int disk_lock(struct disk *);
void disk_lock_nointr(struct disk *);
void disk_unlock(struct disk *);
struct device *disk_lookup(struct cfdriver *, int);
char *disk_readlabel(struct disklabel *, dev_t, char *, size_t);
int disk_map(char *, char *, int, int);
int duid_iszero(u_char *);
const char *duid_format(u_char *);
#endif
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