1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)disk.h 8.2 (Berkeley) 01/09/95 17 * 18 * from: $Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp $ (LBL) 19 */ 20 21 /* 22 * Disk device structures. 23 * 24 * Note that this is only a preliminary outline. The final disk structures 25 * may be somewhat different. 26 */ 27 struct buf; 28 29 struct dkdevice { 30 struct device dk_dev; /* base device */ 31 struct dkdevice *dk_next; /* list of disks; not yet used */ 32 int dk_bps; /* xfer rate: bytes per second */ 33 int dk_bopenmask; /* block devices open */ 34 int dk_copenmask; /* character devices open */ 35 int dk_openmask; /* composite (bopen|copen) */ 36 int dk_state; /* label state ### */ 37 int dk_blkshift; /* shift to convert DEV_BSIZE to blks */ 38 int dk_byteshift; /* shift to convert bytes to blks */ 39 struct dkdriver *dk_driver; /* pointer to driver */ 40 daddr_t dk_labelsector; /* sector containing label */ 41 struct disklabel dk_label; /* label */ 42 }; 43 44 struct dkdriver { 45 void (*d_strategy) __P((struct buf *)); 46 #ifdef notyet 47 int (*d_open) __P((dev_t dev, int ifmt, int, struct proc *)); 48 int (*d_close) __P((dev_t dev, int, int ifmt, struct proc *)); 49 int (*d_ioctl) __P((dev_t dev, u_long cmd, caddr_t data, int fflag, 50 struct proc *)); 51 int (*d_dump) __P((dev_t)); 52 void (*d_start) __P((struct buf *, daddr_t)); 53 int (*d_mklabel) __P((struct dkdevice *)); 54 #endif 55 }; 56 57 /* states */ 58 #define DK_CLOSED 0 /* drive is closed */ 59 #define DK_WANTOPEN 1 /* drive being opened */ 60 #define DK_WANTOPENRAW 2 /* drive being opened */ 61 #define DK_RDLABEL 3 /* label being read */ 62 #define DK_OPEN 4 /* label read, drive open */ 63 #define DK_OPENRAW 5 /* open without label */ 64 65 #ifdef DISKSORT_STATS 66 /* 67 * Stats from disksort(). 68 */ 69 struct disksort_stats { 70 long ds_newhead; /* # new queue heads created */ 71 long ds_newtail; /* # new queue tails created */ 72 long ds_midfirst; /* # insertions into sort list */ 73 long ds_endfirst; /* # insertions at end of sort list */ 74 long ds_newsecond; /* # inversions (2nd lists) created */ 75 long ds_midsecond; /* # insertions into 2nd list */ 76 long ds_endsecond; /* # insertions at end of 2nd list */ 77 }; 78 #endif 79 80 #ifdef KERNEL 81 void disksort __P((struct buf *, struct buf *)); 82 char *readdisklabel __P((struct dkdevice *, int)); 83 int setdisklabel __P((struct dkdevice *, struct disklabel *)); 84 int writedisklabel __P((struct dkdevice *, int)); 85 int diskerr __P((struct dkdevice *, struct buf *, char *, int, int)); 86 #endif 87