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 1.8 2006/09/10 01:26:40 dillon Exp $ 28 */ 29 30 #ifndef _SYS_DISKSLICE_H_ 31 #define _SYS_DISKSLICE_H_ 32 33 #ifndef _SYS_TYPES_H_ 34 #include <sys/types.h> 35 #endif 36 #ifndef _SYS_IOCCOM_H_ 37 #include <sys/ioccom.h> 38 #endif 39 40 #define BASE_SLICE 2 41 #define COMPATIBILITY_SLICE 0 42 #define DIOCGSLICEINFO _IOR('d', 111, struct diskslices) 43 #define DIOCSYNCSLICEINFO _IOW('d', 112, int) 44 #define MAX_SLICES 16 45 #define WHOLE_DISK_SLICE 1 46 47 struct diskslice { 48 u_long ds_offset; /* starting sector */ 49 u_long ds_size; /* number of sectors */ 50 int ds_type; /* (foreign) slice type */ 51 struct disklabel *ds_label; /* BSD label, if any */ 52 void *ds_dev; /* devfs token for raw whole slice */ 53 #ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */ 54 #if MAXPARTITIONS != 16 /* but check consistency if possible */ 55 #error "inconsistent MAXPARTITIONS" 56 #endif 57 #else 58 #define MAXPARTITIONS 16 59 #endif 60 void *ds_devs[MAXPARTITIONS]; /* XXX s.b. in label */ 61 u_char ds_openmask; /* devs open */ 62 u_char ds_wlabel; /* nonzero if label is writable */ 63 }; 64 65 struct diskslices { 66 struct cdevsw *dss_cdevsw; /* for containing device */ 67 int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */ 68 u_int dss_nslices; /* actual dimension of dss_slices[] */ 69 u_int dss_oflags; /* copy of flags for "first" open */ 70 int dss_secmult; /* block to sector multiplier */ 71 int dss_secshift; /* block to sector shift (or -1) */ 72 int dss_secsize; /* sector size */ 73 struct diskslice 74 dss_slices[MAX_SLICES]; /* actually usually less */ 75 }; 76 77 #ifdef _KERNEL 78 79 /* Flags for dsopen(). */ 80 #define DSO_NOLABELS 1 81 #define DSO_ONESLICE 2 82 #define DSO_COMPATLABEL 4 83 84 #define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label) 85 86 struct buf; 87 struct bio; 88 struct disklabel; 89 90 struct bio *dscheck (cdev_t dev, struct bio *bio, struct diskslices *ssp); 91 void dsclose (cdev_t dev, int mode, struct diskslices *ssp); 92 void dsgone (struct diskslices **sspp); 93 int dsinit (cdev_t dev, struct disklabel *lp, 94 struct diskslices **sspp); 95 int dsioctl (cdev_t dev, u_long cmd, caddr_t data, 96 int flags, struct diskslices **sspp); 97 int dsisopen (struct diskslices *ssp); 98 struct diskslices *dsmakeslicestruct (int nslices, struct disklabel *lp); 99 char *dsname (cdev_t dev, int unit, int slice, int part, 100 char *partname); 101 int dsopen (cdev_t dev, int mode, u_int flags, 102 struct diskslices **sspp, struct disklabel *lp); 103 int dssize (cdev_t dev, struct diskslices **sspp); 104 105 #endif /* _KERNEL */ 106 107 #endif /* !_SYS_DISKSLICE_H_ */ 108