Annotation of sys/sys/disk.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: disk.h,v 1.17 2007/06/20 18:15:47 deraadt Exp $ */
! 2: /* $NetBSD: disk.h,v 1.11 1996/04/28 20:22:50 thorpej Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Jason R. Thorpe. All rights reserved.
! 6: * Copyright (c) 1992, 1993
! 7: * The Regents of the University of California. All rights reserved.
! 8: *
! 9: * This software was developed by the Computer Systems Engineering group
! 10: * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
! 11: * contributed to Berkeley.
! 12: *
! 13: * All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by the University of
! 16: * California, Lawrence Berkeley Laboratory.
! 17: *
! 18: * Redistribution and use in source and binary forms, with or without
! 19: * modification, are permitted provided that the following conditions
! 20: * are met:
! 21: * 1. Redistributions of source code must retain the above copyright
! 22: * notice, this list of conditions and the following disclaimer.
! 23: * 2. Redistributions in binary form must reproduce the above copyright
! 24: * notice, this list of conditions and the following disclaimer in the
! 25: * documentation and/or other materials provided with the distribution.
! 26: * 3. Neither the name of the University nor the names of its contributors
! 27: * may be used to endorse or promote products derived from this software
! 28: * without specific prior written permission.
! 29: *
! 30: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 31: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 32: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 33: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 34: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 35: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 36: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 37: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 38: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 39: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 40: * SUCH DAMAGE.
! 41: *
! 42: * from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
! 43: *
! 44: * @(#)disk.h 8.1 (Berkeley) 6/2/93
! 45: */
! 46:
! 47: /*
! 48: * Disk device structures.
! 49: */
! 50:
! 51: #include <sys/time.h>
! 52: #include <sys/queue.h>
! 53: #include <sys/rwlock.h>
! 54:
! 55: struct buf;
! 56: struct disklabel;
! 57:
! 58: #define DS_DISKNAMELEN 16
! 59:
! 60: struct diskstats {
! 61: char ds_name[DS_DISKNAMELEN];
! 62: int ds_busy; /* busy counter */
! 63: u_int64_t ds_rxfer; /* total number of read transfers */
! 64: u_int64_t ds_wxfer; /* total number of write transfers */
! 65: u_int64_t ds_seek; /* total independent seek operations */
! 66: u_int64_t ds_rbytes; /* total bytes read */
! 67: u_int64_t ds_wbytes; /* total bytes written */
! 68: struct timeval ds_attachtime; /* time disk was attached */
! 69: struct timeval ds_timestamp; /* timestamp of last unbusy */
! 70: struct timeval ds_time; /* total time spent busy */
! 71: };
! 72:
! 73: struct disk {
! 74: TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
! 75: struct rwlock dk_lock; /* disk lock */
! 76: char *dk_name; /* disk name */
! 77: int dk_flags; /* disk flags */
! 78: #define DKF_CONSTRUCTED 0x0001
! 79:
! 80: /*
! 81: * Metrics data; note that some metrics may have no meaning
! 82: * on certain types of disks.
! 83: */
! 84: int dk_busy; /* busy counter */
! 85: u_int64_t dk_rxfer; /* total number of read transfers */
! 86: u_int64_t dk_wxfer; /* total number of write transfers */
! 87: u_int64_t dk_seek; /* total independent seek operations */
! 88: u_int64_t dk_rbytes; /* total bytes read */
! 89: u_int64_t dk_wbytes; /* total bytes written */
! 90: struct timeval dk_attachtime; /* time disk was attached */
! 91: struct timeval dk_timestamp; /* timestamp of last unbusy */
! 92: struct timeval dk_time; /* total time spent busy */
! 93:
! 94: int dk_bopenmask; /* block devices open */
! 95: int dk_copenmask; /* character devices open */
! 96: int dk_openmask; /* composite (bopen|copen) */
! 97: int dk_state; /* label state ### */
! 98: int dk_blkshift; /* shift to convert DEV_BSIZE to blks*/
! 99: int dk_byteshift; /* shift to convert bytes to blks */
! 100:
! 101: struct dkdriver *dk_driver; /* pointer to driver */
! 102:
! 103: /*
! 104: * Disk label information. Storage for the in-core disk label
! 105: * must be dynamically allocated, otherwise the size of this
! 106: * structure becomes machine-dependent.
! 107: */
! 108: daddr64_t dk_labelsector; /* sector containing label */
! 109: struct disklabel *dk_label; /* label */
! 110: };
! 111:
! 112: struct dkdriver {
! 113: void (*d_strategy)(struct buf *);
! 114: #ifdef notyet
! 115: int (*d_open)(dev_t dev, int ifmt, int, struct proc *);
! 116: int (*d_close)(dev_t dev, int, int ifmt, struct proc *);
! 117: int (*d_ioctl)(dev_t dev, u_long cmd, caddr_t data, int fflag,
! 118: struct proc *);
! 119: int (*d_dump)(dev_t);
! 120: void (*d_start)(struct buf *, daddr64_t);
! 121: int (*d_mklabel)(struct disk *);
! 122: #endif
! 123: };
! 124:
! 125: /* states */
! 126: #define DK_CLOSED 0 /* drive is closed */
! 127: #define DK_WANTOPEN 1 /* drive being opened */
! 128: #define DK_WANTOPENRAW 2 /* drive being opened */
! 129: #define DK_RDLABEL 3 /* label being read */
! 130: #define DK_OPEN 4 /* label read, drive open */
! 131: #define DK_OPENRAW 5 /* open without label */
! 132:
! 133: #ifdef DISKSORT_STATS
! 134: /*
! 135: * Stats from disksort().
! 136: */
! 137: struct disksort_stats {
! 138: long ds_newhead; /* # new queue heads created */
! 139: long ds_newtail; /* # new queue tails created */
! 140: long ds_midfirst; /* # insertions into sort list */
! 141: long ds_endfirst; /* # insertions at end of sort list */
! 142: long ds_newsecond; /* # inversions (2nd lists) created */
! 143: long ds_midsecond; /* # insertions into 2nd list */
! 144: long ds_endsecond; /* # insertions at end of 2nd list */
! 145: };
! 146: #endif
! 147:
! 148: /*
! 149: * disklist_head is defined here so that user-land has access to it.
! 150: */
! 151: TAILQ_HEAD(disklist_head, disk); /* the disklist is a TAILQ */
! 152:
! 153: #ifdef _KERNEL
! 154: extern int disk_count; /* number of disks in global disklist */
! 155: extern int disk_change; /* disk attached/detached */
! 156:
! 157: void disk_init(void);
! 158: int disk_construct(struct disk *, char *);
! 159: void disk_attach(struct disk *);
! 160: void disk_detach(struct disk *);
! 161: void disk_busy(struct disk *);
! 162: void disk_unbusy(struct disk *, long, int);
! 163:
! 164: int disk_lock(struct disk *);
! 165: void disk_unlock(struct disk *);
! 166: #endif
CVSweb
![[BACK]](/icons/back.gif){kind=icon}
Return to disk.h CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / sys / sys