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