99c563ccca
the drvctl framework. And call this new functionality from cgd(4), the consumer of dksubr.c. We do this to allow gpt(8) to be able to label cgd(4) disks. We also add in some DIOCGSECTORSIZE logic and we ensure that the WEDGE ioctls are not called on either uninitialised disks or disks which have not been opened for write access.
118 lines
4.6 KiB
C
118 lines
4.6 KiB
C
/* $NetBSD: dkvar.h,v 1.16 2012/05/25 10:53:46 elric Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Roland C. Dowdeswell.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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struct pathbuf; /* from namei.h */
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struct dk_geom {
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u_int32_t pdg_secsize;
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u_int32_t pdg_nsectors;
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u_int32_t pdg_ntracks;
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u_int32_t pdg_ncylinders;
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};
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/* literally this is not a softc, but is intended to be included in
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* the pseudo-disk's softc and passed to calls in dksubr.c. It
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* should include the common elements of the pseudo-disk's softc.
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* All elements that are included here should describe the external
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* representation of the disk to the higher layers, and flags that
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* are common to each of the pseudo-disk drivers.
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*/
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struct dk_softc {
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device_t sc_dev;
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u_int32_t sc_flags; /* flags */
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size_t sc_size; /* size of disk */
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struct dk_geom sc_geom; /* geometry info */
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#define DK_XNAME_SIZE 8
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char sc_xname[DK_XNAME_SIZE]; /* external name */
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struct disk sc_dkdev; /* generic disk info */
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struct bufq_state *sc_bufq; /* buffer queue */
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};
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/* sc_flags:
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* We separate the flags into two varieties, those that dksubr.c
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* understands and manipulates and those that it does not.
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*/
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#define DKF_INITED 0x00010000 /* unit has been initialised */
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#define DKF_WLABEL 0x00020000 /* label area is writable */
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#define DKF_LABELLING 0x00040000 /* unit is currently being labeled */
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#define DKF_WARNLABEL 0x00080000 /* warn if disklabel not present */
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#define DKF_LABELSANITY 0x00100000 /* warn if disklabel not sane */
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#define DKF_TAKEDUMP 0x00200000 /* allow dumping */
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/* Mask of flags that dksubr.c understands, other flags are fair game */
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#define DK_FLAGMASK 0xffff0000
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/*
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* This defines the interface to the routines in dksubr.c. This
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* should be a single static structure per pseudo-disk driver.
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* We only define the functions that we currently need.
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*/
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struct dk_intf {
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int di_dtype; /* disk type */
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const char *di_dkname; /* disk type name */
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int (*di_open)(dev_t, int, int, struct lwp *);
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int (*di_close)(dev_t, int, int, struct lwp *);
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void (*di_strategy)(struct buf *);
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int (*di_diskstart)(struct dk_softc *, struct buf *);
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};
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#define DK_BUSY(_dksc, _pmask) \
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(((_dksc)->sc_dkdev.dk_openmask & ~(_pmask)) || \
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((_dksc)->sc_dkdev.dk_bopenmask & (_pmask) && \
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((_dksc)->sc_dkdev.dk_copenmask & (_pmask))))
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/*
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* Functions that are exported to the pseudo disk implementations:
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*/
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void dk_sc_init(struct dk_softc *, const char *);
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int dk_open(struct dk_intf *, struct dk_softc *, dev_t,
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int, int, struct lwp *);
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int dk_close(struct dk_intf *, struct dk_softc *, dev_t,
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int, int, struct lwp *);
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void dk_strategy(struct dk_intf *, struct dk_softc *, struct buf *);
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void dk_start(struct dk_intf *, struct dk_softc *);
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void dk_iodone(struct dk_intf *, struct dk_softc *);
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int dk_size(struct dk_intf *, struct dk_softc *, dev_t);
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int dk_ioctl(struct dk_intf *, struct dk_softc *, dev_t,
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u_long, void *, int, struct lwp *);
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int dk_dump(struct dk_intf *, struct dk_softc *, dev_t,
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daddr_t, void *, size_t);
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void dk_getdisklabel(struct dk_intf *, struct dk_softc *, dev_t);
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void dk_getdefaultlabel(struct dk_intf *, struct dk_softc *,
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struct disklabel *);
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void dk_set_properties(struct dk_intf *, struct dk_softc *);
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int dk_lookup(struct pathbuf *, struct lwp *, struct vnode **);
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