122 lines
4.5 KiB
C
122 lines
4.5 KiB
C
/*-
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* Copyright (c) 1994 Bruce D. Evans.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: diskslice.h,v 1.28 1998/08/16 01:47:19 bde Exp $
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*/
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#ifndef _SYS_DISKSLICE_H_
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#define _SYS_DISKSLICE_H_
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#ifndef KERNEL
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#include <sys/types.h>
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#endif
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#include <sys/ioccom.h>
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#define BASE_SLICE 2
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#define COMPATIBILITY_SLICE 0
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#define DIOCGSLICEINFO _IOR('d', 111, struct diskslices)
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#define DIOCSYNCSLICEINFO _IOW('d', 112, int)
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#define MAX_SLICES 32
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#define WHOLE_DISK_SLICE 1
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struct diskslice {
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u_long ds_offset; /* starting sector */
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u_long ds_size; /* number of sectors */
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int ds_type; /* (foreign) slice type */
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#ifdef PC98
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int ds_subtype; /* sub slice type */
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u_char ds_name[16]; /* slice name */
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#endif
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struct dkbad_intern *ds_bad; /* bad sector table, if any */
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struct disklabel *ds_label; /* BSD label, if any */
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void *ds_bdev; /* devfs token for whole slice */
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void *ds_cdev; /* devfs token for raw whole slice */
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#ifdef MAXPARTITIONS /* XXX don't depend on disklabel.h */
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#if MAXPARTITIONS != 8 /* but check consistency if possible */
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#error "inconsistent MAXPARTITIONS"
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#endif
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#else
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#define MAXPARTITIONS 8
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#endif
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void *ds_bdevs[MAXPARTITIONS]; /* XXX s.b. in label */
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void *ds_cdevs[MAXPARTITIONS]; /* XXX s.b. in label */
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u_char ds_bopenmask; /* bdevs open */
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u_char ds_copenmask; /* cdevs open */
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u_char ds_openmask; /* [bc]devs open */
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u_char ds_wlabel; /* nonzero if label is writable */
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};
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struct diskslices {
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struct cdevsw *dss_cdevsw; /* for containing device */
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int dss_first_bsd_slice; /* COMPATIBILITY_SLICE is mapped here */
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u_int dss_nslices; /* actual dimension of dss_slices[] */
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u_int dss_oflags; /* copy of flags for "first" open */
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int dss_secmult; /* block to sector multiplier */
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int dss_secshift; /* block to sector shift (or -1) */
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int dss_secsize; /* sector size */
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struct diskslice
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dss_slices[MAX_SLICES]; /* actually usually less */
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};
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#ifdef KERNEL
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/* Flags for dsopen(). */
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#define DSO_NOLABELS 1
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#define DSO_ONESLICE 2
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#define dsgetbad(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_bad)
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#define dsgetlabel(dev, ssp) (ssp->dss_slices[dkslice(dev)].ds_label)
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struct buf;
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struct disklabel;
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typedef int ds_setgeom_t __P((struct disklabel *lp));
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int dscheck __P((struct buf *bp, struct diskslices *ssp));
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void dsclose __P((dev_t dev, int mode, struct diskslices *ssp));
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void dsgone __P((struct diskslices **sspp));
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int dsinit __P((char *dname, dev_t dev, void (*strat)(struct buf *bp),
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struct disklabel *lp, struct diskslices **sspp));
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int dsioctl __P((char *dname, dev_t dev, u_long cmd, caddr_t data,
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int flags, struct diskslices **sspp,
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void (*strat)(struct buf *bp), ds_setgeom_t *setgeom));
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int dsisopen __P((struct diskslices *ssp));
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struct diskslices *dsmakeslicestruct __P((int nslices, struct disklabel *lp));
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char *dsname __P((char *dname, int unit, int slice, int part,
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char *partname));
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int dsopen __P((char *dname, dev_t dev, int mode, u_int flags,
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struct diskslices **sspp, struct disklabel *lp,
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void (*strat)(struct buf *bp), ds_setgeom_t *setgeom,
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struct cdevsw *cdevsw));
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int dssize __P((dev_t dev, struct diskslices **sspp,
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int (*dopen)(dev_t dev, int oflags, int devtype,
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struct proc *p),
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int (*dclose)(dev_t dev, int fflag, int devtype,
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struct proc *p)));
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#endif /* KERNEL */
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#endif /* !_SYS_DISKSLICE_H_ */
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