Add VND driver, providing loopback devices
Change-Id: I40fa695e28c67477a75383e6f1550e451afcab41
This commit is contained in:
David van Moolenbroek
@@ -21,6 +21,8 @@ INCSDIR= /usr/include/dev
|
||||
# Only install includes which are used by userland
|
||||
INCS= biovar.h ccdvar.h cgdvar.h fssvar.h keylock.h kttcpio.h lockstat.h \
|
||||
md.h vndvar.h
|
||||
.else
|
||||
INCS= vndvar.h
|
||||
.endif
|
||||
|
||||
.include <bsd.kinc.mk>
|
||||
|
||||
218
sys/dev/vndvar.h
Normal file
218
sys/dev/vndvar.h
Normal file
@@ -0,0 +1,218 @@
|
||||
/* $NetBSD: vndvar.h,v 1.31 2011/06/29 09:12:42 hannken 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_
|
||||
|
||||
#ifndef __minix
|
||||
#include <sys/pool.h>
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 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 {
|
||||
#ifndef __minix
|
||||
char *vnd_file; /* pathname of file to mount */
|
||||
#else
|
||||
int vnd_fildes; /* file descriptor of file to mount */
|
||||
#endif
|
||||
int vnd_flags; /* flags; see below */
|
||||
struct vndgeom vnd_geom; /* geometry to emulate */
|
||||
#ifndef __minix
|
||||
unsigned int vnd_osize; /* (returned) size of disk */
|
||||
#endif
|
||||
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 */
|
||||
|
||||
#ifndef __minix
|
||||
#ifdef _KERNEL
|
||||
|
||||
struct vnode;
|
||||
|
||||
/*
|
||||
* A vnode disk's state information.
|
||||
*/
|
||||
struct vnd_softc {
|
||||
device_t sc_dev;
|
||||
int sc_flags; /* flags */
|
||||
size_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_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;
|
||||
};
|
||||
#endif
|
||||
|
||||
/*
|
||||
* 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_ */
|
||||
@@ -23,6 +23,7 @@
|
||||
#include <sys/ioc_block.h> /* 'b' */
|
||||
#include <sys/ioc_fbd.h> /* 'B' */
|
||||
#include <sys/ioc_fb.h> /* 'V' */
|
||||
#include <dev/vndvar.h> /* 'F' */
|
||||
|
||||
#if defined(_NETBSD_SOURCE)
|
||||
#define TIOCDRAIN TCDRAIN
|
||||
|
||||
Reference in New Issue
Block a user