1 /*- 2 * Copyright (c) 1994 Bruce D. Evans. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/sys/sys/diskslice.h,v 1.36.2.1 2001/01/29 01:50:50 ken Exp $ 27 */ 28 29 #ifndef _SYS_DISKSLICE_H_ 30 #define _SYS_DISKSLICE_H_ 31 32 #ifndef _KERNEL 33 #include <sys/types.h> 34 #endif 35 #include <sys/ioccom.h> 36 37 #define BASE_SLICE 2 38 #define COMPATIBILITY_SLICE 0 39 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices) 40 #define DIOCSYNCSLICEINFO _IOW('d', 112, int) 41 #define MAX_SLICES 32 42 #define WHOLE_DISK_SLICE 1 43 44 struct diskslice { 45 u_long ds_offset; /* starting sector */ 46 u_long ds_size; /* number of sectors */ 47 int ds_type; /* (foreign) slice type */ 48 #ifdef PC98 49 int ds_subtype; /* sub slice type */ 50 u_char ds_name[16]; /* slice name */ 51 #endif 52 struct disklabel *ds_label; /* BSD label, if any */ 53 void *ds_dev; /* devfs token for raw whole slice */ 54 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */ 55 #if MAXPARTITIONS != 8 /* but check consistency if possible */ 56 #error "inconsistent MAXPARTITIONS" 57 #endif 58 #else 59 #define MAXPARTITIONS 8 60 #endif 61 void *ds_devs[MAXPARTITIONS]; /* XXX s.b. in label */ 62 u_char ds_openmask; /* devs open */ 63 u_char ds_wlabel; /* nonzero if label is writable */ 64 }; 65 66 struct diskslices { 67 struct cdevsw *dss_cdevsw; /* for containing device */ 68 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */ 69 u_int dss_nslices; /* actual dimension of dss_slices[] */ 70 u_int dss_oflags; /* copy of flags for "first" open */ 71 int dss_secmult; /* block to sector multiplier */ 72 int dss_secshift; /* block to sector shift (or -1) */ 73 int dss_secsize; /* sector size */ 74 struct diskslice 75 dss_slices[MAX_SLICES]; /* actually usually less */ 76 }; 77 78 #ifdef _KERNEL 79 80 /* Flags for dsopen(). */ 81 #define DSO_NOLABELS 1 82 #define DSO_ONESLICE 2 83 #define DSO_COMPATLABEL 4 84 85 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label) 86 87 struct buf; 88 struct disklabel; 89 90 int dscheck __P((struct buf *bp, struct diskslices *ssp)); 91 void dsclose __P((dev_t dev, int mode, struct diskslices *ssp)); 92 void dsgone __P((struct diskslices **sspp)); 93 int dsinit __P((dev_t dev, struct disklabel *lp, 94 struct diskslices **sspp)); 95 int dsioctl __P((dev_t dev, u_long cmd, caddr_t data, 96 int flags, struct diskslices **sspp)); 97 int dsisopen __P((struct diskslices *ssp)); 98 struct diskslices *dsmakeslicestruct __P((int nslices, struct disklabel *lp)); 99 char *dsname __P((dev_t dev, int unit, int slice, int part, 100 char *partname)); 101 int dsopen __P((dev_t dev, int mode, u_int flags, 102 struct diskslices **sspp, struct disklabel *lp)); 103 int dssize __P((dev_t dev, struct diskslices **sspp)); 104 105 #endif /* _KERNEL */ 106 107 #endif /* !_SYS_DISKSLICE_H_ */ 108