118 lines
4.6 KiB
C
118 lines
4.6 KiB
C
/* $NetBSD: dkvar.h,v 1.15 2010/11/19 06:44:39 dholland Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Roland C. Dowdeswell.
|
|
*
|
|
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
|
|
*/
|
|
|
|
struct pathbuf; /* from namei.h */
|
|
|
|
|
|
struct dk_geom {
|
|
u_int32_t pdg_secsize;
|
|
u_int32_t pdg_nsectors;
|
|
u_int32_t pdg_ntracks;
|
|
u_int32_t pdg_ncylinders;
|
|
};
|
|
|
|
/* literally this is not a softc, but is intended to be included in
|
|
* the pseudo-disk's softc and passed to calls in dksubr.c. It
|
|
* should include the common elements of the pseudo-disk's softc.
|
|
* All elements that are included here should describe the external
|
|
* representation of the disk to the higher layers, and flags that
|
|
* are common to each of the pseudo-disk drivers.
|
|
*/
|
|
struct dk_softc {
|
|
void *sc_osc; /* the softc of the underlying
|
|
* driver */
|
|
u_int32_t sc_flags; /* flags */
|
|
size_t sc_size; /* size of disk */
|
|
struct dk_geom sc_geom; /* geometry info */
|
|
#define DK_XNAME_SIZE 8
|
|
char sc_xname[DK_XNAME_SIZE]; /* external name */
|
|
struct disk sc_dkdev; /* generic disk info */
|
|
struct bufq_state *sc_bufq; /* buffer queue */
|
|
};
|
|
|
|
/* sc_flags:
|
|
* We separate the flags into two varieties, those that dksubr.c
|
|
* understands and manipulates and those that it does not.
|
|
*/
|
|
|
|
#define DKF_INITED 0x00010000 /* unit has been initialised */
|
|
#define DKF_WLABEL 0x00020000 /* label area is writable */
|
|
#define DKF_LABELLING 0x00040000 /* unit is currently being labeled */
|
|
#define DKF_WARNLABEL 0x00080000 /* warn if disklabel not present */
|
|
#define DKF_LABELSANITY 0x00100000 /* warn if disklabel not sane */
|
|
#define DKF_TAKEDUMP 0x00200000 /* allow dumping */
|
|
|
|
/* Mask of flags that dksubr.c understands, other flags are fair game */
|
|
#define DK_FLAGMASK 0xffff0000
|
|
|
|
/*
|
|
* This defines the interface to the routines in dksubr.c. This
|
|
* should be a single static structure per pseudo-disk driver.
|
|
* We only define the functions that we currently need.
|
|
*/
|
|
struct dk_intf {
|
|
int di_dtype; /* disk type */
|
|
const char *di_dkname; /* disk type name */
|
|
int (*di_open)(dev_t, int, int, struct lwp *);
|
|
int (*di_close)(dev_t, int, int, struct lwp *);
|
|
void (*di_strategy)(struct buf *);
|
|
int (*di_diskstart)(struct dk_softc *, struct buf *);
|
|
};
|
|
|
|
#define DK_BUSY(_dksc, _pmask) \
|
|
(((_dksc)->sc_dkdev.dk_openmask & ~(_pmask)) || \
|
|
((_dksc)->sc_dkdev.dk_bopenmask & (_pmask) && \
|
|
((_dksc)->sc_dkdev.dk_copenmask & (_pmask))))
|
|
|
|
/*
|
|
* Functions that are exported to the pseudo disk implementations:
|
|
*/
|
|
|
|
void dk_sc_init(struct dk_softc *, void *, const char *);
|
|
|
|
int dk_open(struct dk_intf *, struct dk_softc *, dev_t,
|
|
int, int, struct lwp *);
|
|
int dk_close(struct dk_intf *, struct dk_softc *, dev_t,
|
|
int, int, struct lwp *);
|
|
void dk_strategy(struct dk_intf *, struct dk_softc *, struct buf *);
|
|
void dk_start(struct dk_intf *, struct dk_softc *);
|
|
void dk_iodone(struct dk_intf *, struct dk_softc *);
|
|
int dk_size(struct dk_intf *, struct dk_softc *, dev_t);
|
|
int dk_ioctl(struct dk_intf *, struct dk_softc *, dev_t,
|
|
u_long, void *, int, struct lwp *);
|
|
int dk_dump(struct dk_intf *, struct dk_softc *, dev_t,
|
|
daddr_t, void *, size_t);
|
|
void dk_getdisklabel(struct dk_intf *, struct dk_softc *, dev_t);
|
|
void dk_getdefaultlabel(struct dk_intf *, struct dk_softc *,
|
|
struct disklabel *);
|
|
|
|
int dk_lookup(struct pathbuf *, struct lwp *, struct vnode **);
|