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NetBSD/sys/dev/vndvar.h

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/* $NetBSD: vndvar.h,v 1.35 2015/09/06 06:00:59 dholland Exp $ */
/*-
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* 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.
*/
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
*
* @(#)vnioctl.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _SYS_DEV_VNDVAR_H_
#define _SYS_DEV_VNDVAR_H_
#include <sys/ioccom.h>
#include <sys/pool.h>
/*
* Vnode disk pseudo-geometry information.
*/
struct vndgeom {
u_int32_t vng_secsize; /* # bytes per sector */
u_int32_t vng_nsectors; /* # data sectors per track */
u_int32_t vng_ntracks; /* # tracks per cylinder */
u_int32_t vng_ncylinders; /* # cylinders per unit */
};
/*
* Ioctl definitions for file (vnode) disk pseudo-device.
*/
struct vnd_ioctl {
char *vnd_file; /* pathname of file to mount */
int vnd_flags; /* flags; see below */
struct vndgeom vnd_geom; /* geometry to emulate */
unsigned int vnd_osize; /* (returned) size of disk */
uint64_t vnd_size; /* (returned) size of disk */
};
/* vnd_flags */
#define VNDIOF_HASGEOM 0x01 /* use specified geometry */
#define VNDIOF_READONLY 0x02 /* as read-only device */
#define VNDIOF_FORCE 0x04 /* force close */
#ifdef _KERNEL
struct vnode;
/*
* A vnode disk's state information.
*/
struct vnd_softc {
device_t sc_dev;
int sc_flags; /* flags */
uint64_t sc_size; /* size of vnd */
struct vnode *sc_vp; /* vnode */
kauth_cred_t sc_cred; /* credentials */
int sc_maxactive; /* max # of active requests */
struct bufq_state *sc_tab; /* transfer queue */
int sc_pending; /* number of pending transfers */
int sc_active; /* number of active transfers */
struct disk sc_dkdev; /* generic disk device info */
struct vndgeom sc_geom; /* virtual geometry */
struct pool sc_vxpool; /* vndxfer pool */
struct pool sc_vbpool; /* vndbuf pool */
struct lwp *sc_kthread; /* kernel thread */
u_int32_t sc_comp_blksz; /* precompressed block size */
u_int32_t sc_comp_numoffs;/* count of compressed block offsets */
u_int64_t *sc_comp_offsets;/* file idx's to compressed blocks */
unsigned char *sc_comp_buff; /* compressed data buffer */
unsigned char *sc_comp_decombuf;/* decompressed data buffer */
int32_t sc_comp_buffblk;/*current decompressed block */
z_stream sc_comp_stream;/* decompress descriptor */
};
#endif
/* sc_flags */
#define VNF_INITED 0x001 /* unit has been initialized */
#define VNF_WLABEL 0x002 /* label area is writable */
#define VNF_LABELLING 0x004 /* unit is currently being labelled */
#define VNF_WANTED 0x008 /* someone is waiting to obtain a lock */
#define VNF_LOCKED 0x010 /* unit is locked */
#define VNF_READONLY 0x020 /* unit is read-only */
#define VNF_KLABEL 0x040 /* keep label on close */
#define VNF_VLABEL 0x080 /* label is valid */
#define VNF_KTHREAD 0x100 /* thread is running */
#define VNF_VUNCONF 0x200 /* device is unconfiguring */
#define VNF_COMP 0x400 /* file is compressed */
#define VNF_CLEARING 0x800 /* unit is being torn down */
#define VNF_USE_VN_RDWR 0x1000 /* have to use vn_rdwr() */
/* structure of header in a compressed file */
struct vnd_comp_header
{
char preamble[128];
u_int32_t block_size;
u_int32_t num_blocks;
};
/*
* A simple structure for describing which vnd units are in use.
*/
struct vnd_user {
int vnu_unit; /* which vnd unit */
dev_t vnu_dev; /* file is on this device... */
ino_t vnu_ino; /* ...at this inode */
};
/*
* Before you can use a unit, it must be configured with VNDIOCSET.
* The configuration persists across opens and closes of the device;
* an VNDIOCCLR must be used to reset a configuration. An attempt to
* VNDIOCSET an already active unit will return EBUSY.
*/
#define VNDIOCSET _IOWR('F', 0, struct vnd_ioctl) /* enable disk */
#define VNDIOCCLR _IOW('F', 1, struct vnd_ioctl) /* disable disk */
#define VNDIOCGET _IOWR('F', 3, struct vnd_user) /* get list */
#ifdef _KERNEL
/*
* Everything else is kernel-private, mostly exported for compat/netbsd32.
*
* NetBSD 3.0 had a 32-bit value for vnu_ino.
*
* NetBSD 5.0 had a 32-bit value for vnu_dev, and vnd_size.
*/
struct vnd_user30 {
int vnu_unit; /* which vnd unit */
uint32_t vnu_dev; /* file is on this device... */
uint32_t vnu_ino; /* ...at this inode */
};
#define VNDIOCGET30 _IOWR('F', 2, struct vnd_user30) /* get list */
struct vnd_user50 {
int vnu_unit; /* which vnd unit */
uint32_t vnu_dev; /* file is on this device... */
ino_t vnu_ino; /* ...at this inode */
};
#define VNDIOCGET50 _IOWR('F', 3, struct vnd_user50) /* get list */
struct vnd_ioctl50 {
char *vnd_file; /* pathname of file to mount */
int vnd_flags; /* flags; see below */
struct vndgeom vnd_geom; /* geometry to emulate */
unsigned int vnd_size; /* (returned) size of disk */
};
#define VNDIOCSET50 _IOWR('F', 0, struct vnd_ioctl50)
#define VNDIOCCLR50 _IOW('F', 1, struct vnd_ioctl50)
#endif /* _KERNEL */
#endif /* _SYS_DEV_VNDVAR_H_ */
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