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 * $DragonFly: src/sys/sys/diskslice.h,v 1.4 2004/03/04 01:37:57 dillon Exp $ 28 */ 29 30 #ifndef _SYS_DISKSLICE_H_ 31 #define _SYS_DISKSLICE_H_ 32 33 #ifndef _KERNEL 34 #include <sys/types.h> 35 #endif 36 #include <sys/ioccom.h> 37 38 #define BASE_SLICE 2 39 #define COMPATIBILITY_SLICE 0 40 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices) 41 #define DIOCSYNCSLICEINFO _IOW('d', 112, int) 42 #define MAX_SLICES 16 43 #define WHOLE_DISK_SLICE 1 44 45 struct diskslice { 46 u_long ds_offset; /* starting sector */ 47 u_long ds_size; /* number of sectors */ 48 int ds_type; /* (foreign) slice type */ 49 #ifdef PC98 50 int ds_subtype; /* sub slice type */ 51 u_char ds_name[16]; /* slice name */ 52 #endif 53 struct disklabel *ds_label; /* BSD label, if any */ 54 void *ds_dev; /* devfs token for raw whole slice */ 55 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */ 56 #if MAXPARTITIONS != 16 /* but check consistency if possible */ 57 #error "inconsistent MAXPARTITIONS" 58 #endif 59 #else 60 #define MAXPARTITIONS 16 61 #endif 62 void *ds_devs[MAXPARTITIONS]; /* XXX s.b. in label */ 63 u_char ds_openmask; /* devs open */ 64 u_char ds_wlabel; /* nonzero if label is writable */ 65 }; 66 67 struct diskslices { 68 struct cdevsw *dss_cdevsw; /* for containing device */ 69 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */ 70 u_int dss_nslices; /* actual dimension of dss_slices[] */ 71 u_int dss_oflags; /* copy of flags for "first" open */ 72 int dss_secmult; /* block to sector multiplier */ 73 int dss_secshift; /* block to sector shift (or -1) */ 74 int dss_secsize; /* sector size */ 75 struct diskslice 76 dss_slices[MAX_SLICES]; /* actually usually less */ 77 }; 78 79 #ifdef _KERNEL 80 81 /* Flags for dsopen(). */ 82 #define DSO_NOLABELS 1 83 #define DSO_ONESLICE 2 84 #define DSO_COMPATLABEL 4 85 86 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label) 87 88 struct buf; 89 struct disklabel; 90 91 int dscheck (struct buf *bp, struct diskslices *ssp); 92 void dsclose (dev_t dev, int mode, struct diskslices *ssp); 93 void dsgone (struct diskslices **sspp); 94 int dsinit (dev_t dev, struct disklabel *lp, 95 struct diskslices **sspp); 96 int dsioctl (dev_t dev, u_long cmd, caddr_t data, 97 int flags, struct diskslices **sspp); 98 int dsisopen (struct diskslices *ssp); 99 struct diskslices *dsmakeslicestruct (int nslices, struct disklabel *lp); 100 char *dsname (dev_t dev, int unit, int slice, int part, 101 char *partname); 102 int dsopen (dev_t dev, int mode, u_int flags, 103 struct diskslices **sspp, struct disklabel *lp); 104 int dssize (dev_t dev, struct diskslices **sspp); 105 106 #endif /* _KERNEL */ 107 108 #endif /* !_SYS_DISKSLICE_H_ */ 109