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/* $NetBSD: disk.h,v 1.65 2015/08/16 18:00:03 mlelstv Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 2004 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 Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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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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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratories.
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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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Header: disk.h,v 1.5 92/11/19 04:33:03 torek Exp (LBL)
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*
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* @(#)disk.h 8.2 (Berkeley) 1/9/95
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*/
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#ifndef _SYS_DISK_H_
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#define _SYS_DISK_H_
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/*
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* Disk device structures.
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*/
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#ifdef _KERNEL
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#include <sys/device.h> |
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#endif
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#include <sys/dkio.h> |
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#include <sys/time.h> |
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#include <sys/queue.h> |
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#include <sys/mutex.h> |
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#include <sys/iostat.h> |
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#include <prop/proplib.h> |
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struct buf;
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struct disk;
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struct disklabel;
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struct cpu_disklabel;
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struct lwp;
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struct vnode;
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/*
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* Disk information dictionary.
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*
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* This contains general infomation for disk devices.
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*
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* <dict>
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* <key>type</key>
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* <string>...</string>
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* <key>geometry</key>
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* <dict>
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* <!-- See below for disk geometry dictionary
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* contents. -->
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* </dict>
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*
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* <!-- optional information -->
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* <key>rpm</key>
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* <integer>...</integer>
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* <key>sector-interleave</key>
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* <integer>...</integer>
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* <key>track-skew</key>
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* <integer>...</integer>
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* <key>cylinder-skew</key>
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* <integer>...</integer>
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* <key>head-switch-usecs</key>
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* <integer>...</integer>
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* <key>track-seek-usecs</key>
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* <integer>...</integer>
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* <key>removable</key>
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* <false/>
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* <key>ecc</key>
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* <false/>
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* <key>bad-sector-forwarding</key>
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* <true/>
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* <key>ramdisk</key>
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* <false/>
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* <key>back-to-back-transfers</key>
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* <true/>
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*
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* <!-- additional information for SMD drives -->
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* <key>smd-skip-sectoring</key>
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* <false/>
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* <!-- XXX better names for these properties -->
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* <key>smd-mindist</key>
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* <integer>...</integer>
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* <key>smd-maxdist</key>
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* <integer>...</integer>
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* <key>smd-sdist</key>
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* <integer>...</integer>
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*
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* <!-- additional information for ST506 drives -->
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* <!-- XXX better names for these properties -->
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* <key>st506-precompcyl</key>
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* <integer>...</integer>
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* <key>st506-gap3</key>
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* <integer>...</integer>
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*
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* <!-- additional information for ATA drives -->
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* <!-- XXX -->
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*
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* <!-- additional information for SCSI drives -->
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* <!-- XXX -->
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* </dict>
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*/
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/*
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* dkwedge_info:
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*
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* Information needed to configure (or query configuration of) a
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* disk wedge.
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*/
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struct dkwedge_info {
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char dkw_devname[16];/* device-style name (e.g. "dk0") */ |
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uint8_t dkw_wname[128]; /* wedge name (Unicode, UTF-8) */ |
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char dkw_parent[16]; /* parent disk device name */ |
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daddr_t dkw_offset; /* LBA offset of wedge in parent */
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uint64_t dkw_size; /* size of wedge in blocks */
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char dkw_ptype[32]; /* partition type string */ |
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}; |
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/*
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* dkwedge_list:
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*
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* Structure used to query a list of wedges.
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*/
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struct dkwedge_list {
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void *dkwl_buf; /* storage for dkwedge_info array */ |
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size_t dkwl_bufsize; /* size of that buffer */
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u_int dkwl_nwedges; /* total number of wedges */
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u_int dkwl_ncopied; /* number actually copied */
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}; |
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#ifdef _KERNEL
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/*
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* dkwedge_discovery_method:
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*
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* Structure used to describe partition map parsing schemes
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* used for wedge autodiscovery.
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*/
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struct dkwedge_discovery_method {
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/* link in wedge driver's list */
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LIST_ENTRY(dkwedge_discovery_method) ddm_list; |
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const char *ddm_name; /* name of this method */ |
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int ddm_priority; /* search priority */ |
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int (*ddm_discover)(struct disk *, struct vnode *); |
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}; |
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#define DKWEDGE_DISCOVERY_METHOD_DECL(name, prio, discover) \
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static struct dkwedge_discovery_method name ## _ddm = { \ |
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{ NULL, NULL }, \
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#name, \
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prio, \ |
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discover \ |
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}; \ |
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__link_set_add_data(dkwedge_methods, name ## _ddm) |
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#endif /* _KERNEL */ |
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/* Some common partition types */
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#define DKW_PTYPE_UNKNOWN "" |
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#define DKW_PTYPE_UNUSED "unused" |
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#define DKW_PTYPE_SWAP "swap" |
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#define DKW_PTYPE_V6 "v6" |
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#define DKW_PTYPE_V7 "v7" |
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#define DKW_PTYPE_SYSV "sysv" |
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#define DKW_PTYPE_V71K "v71k" |
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#define DKW_PTYPE_V8 "v8" |
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#define DKW_PTYPE_FFS "ffs" |
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#define DKW_PTYPE_FAT "msdos" |
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#define DKW_PTYPE_LFS "lfs" |
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#define DKW_PTYPE_OTHER "other" |
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#define DKW_PTYPE_HPFS "hpfs" |
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#define DKW_PTYPE_ISO9660 "cd9660" |
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#define DKW_PTYPE_BOOT "boot" |
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#define DKW_PTYPE_AMIGADOS "ados" |
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#define DKW_PTYPE_HFS "hfs" |
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#define DKW_PTYPE_FILECORE "filecore" |
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#define DKW_PTYPE_EXT2FS "ext2fs" |
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#define DKW_PTYPE_NTFS "ntfs" |
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#define DKW_PTYPE_RAIDFRAME "raidframe" |
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#define DKW_PTYPE_CCD "ccd" |
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#define DKW_PTYPE_JFS2 "jfs2" |
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#define DKW_PTYPE_APPLEUFS "appleufs" |
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#define DKW_PTYPE_VINUM "vinum" |
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#define DKW_PTYPE_UDF "udf" |
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#define DKW_PTYPE_APPLEHFS "hfs" |
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#define DKW_PTYPE_SYSVBFS "sysvbfs" |
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#define DKW_PTYPE_EFS "efs" |
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#define DKW_PTYPE_NILFS "nilfs" |
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#define DKW_PTYPE_CGD "cgd" |
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#define DKW_PTYPE_MINIXFS3 "minixfs3" |
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/*
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* Ensure each symbol used in FSTYPE_DEFN in <sys/disklabel.h>
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* has a corresponding DKW_PTYPE_* definition.
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*/
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#define DKW_PTYPE_MSDOS DKW_PTYPE_FAT
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#define DKW_PTYPE_BSDFFS DKW_PTYPE_FFS
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#define DKW_PTYPE_BSDLFS DKW_PTYPE_LFS
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#define DKW_PTYPE_ADOS DKW_PTYPE_AMIGADOS
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#define DKW_PTYPE_EX2FS DKW_PTYPE_EXT2FS
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#define DKW_PTYPE_RAID DKW_PTYPE_RAIDFRAME
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/*
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* Disk geometry dictionary.
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*
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* NOTE: Not all geometry information is relevant for every kind of disk.
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*
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* <dict>
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* <key>sectors-per-unit</key>
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* <integer>...</integer>
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* <key>sector-size</key>
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* <integer>...</integer>
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* <key>sectors-per-track</key>
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* <integer>...</integer>
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* <key>tracks-per-cylinder</key>
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* <integer>...</integer>
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* <key>cylinders-per-unit</key>
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* <integer>...</integer>
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* <key>physical-cylinders-per-unit</key>
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* <integer>...</integer>
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* <key>spare-sectors-per-track</key>
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* <integer>...</integer>
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* <key>spare-sectors-per-cylinder</key>
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* <integer>...</integer>
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* <key>alternative-cylinders</key>
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* <integer>...</integer>
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* </dict>
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* NOTE: Not all geometry information is relevant for every kind of disk.
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*/
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struct disk_geom {
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int64_t dg_secperunit; /* # of data sectors per unit */
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uint32_t dg_secsize; /* # of bytes per sector */
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uint32_t dg_nsectors; /* # of data sectors per track */
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uint32_t dg_ntracks; /* # of tracks per cylinder */
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uint32_t dg_ncylinders; /* # of data cylinders per unit */
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uint32_t dg_secpercyl; /* # of data sectors per cylinder */
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uint32_t dg_pcylinders; /* # of physical cylinders per unit */
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/*
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* Spares (bad sector replacements) below are not counted in
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* dg_nsectors or dg_secpercyl. Spare sectors are assumed to
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* be physical sectors which occupy space at the end of each
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* track and/or cylinder.
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*/
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uint32_t dg_sparespertrack; |
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uint32_t dg_sparespercyl; |
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/*
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* Alternative cylinders include maintenance, replacement,
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* configuration description areas, etc.
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*/
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uint32_t dg_acylinders; |
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}; |
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/*
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* Disk partition dictionary.
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*
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* A partition is represented as a dictionary containing generic partition
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* properties (such as starting block and block count), as well as information
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* that is specific to individual partition map formats.
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*
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* <dict>
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* <key>start-block</key>
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* <integer>...</integer>
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* <key>block-count</key>
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* <integer>...</integer>
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* <!-- DKW_PTYPE strings ("" or missing if unknown) -->
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* <key>type</type>
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* <string>...</string>
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* <!-- optional -->
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* <key>name</key>
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* <string>...</string>
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*
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* <!-- these are valid for GPT partition maps -->
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* <key>gpt-type-guid</key>
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* <string>...</string>
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* <key>gpt-partition-guid</key>
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* <string>...</string>
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* <key>gpt-platform-required</key>
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* <false/>
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*
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* <!-- these are valid for 4.4BSD partition maps -->
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* <key>bsd44-partition-type</key>
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* <integer>...</integer>
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* <key>bsd44-fs-fragment-size</key>
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* <integer>...</integer>
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* <key>bsd44-iso9660-session-offset</key>
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* <integer>...</integer>
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* <key>bsd44-ffs-cylinders-per-group</key>
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* <integer>...</integer>
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* <key>bsd44-lfs-segment-shift</key>
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* <integer>...</integer>
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*
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* <!-- these are valid for NeXT partition maps -->
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* <key>next-block-size</key>
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* <integer>...</integer>
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* <key>next-fs-fragment-size</key>
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* <integer>...</integer>
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* <key>next-fs-optimization</key>
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* <string>...</string> <!-- "space" or "time" -->
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* <key>next-fs-cylinders-per-group</key>
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* <integer>...</integer>
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* <key>next-bytes-per-inode-density</key>
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* <integer>...</integer>
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* <key>next-minfree-percentage</key>
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* <integer>...</integer>
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* <key>next-run-newfs-during-init</key>
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* <false/>
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* <key>next-mount-point</key>
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* <string>...</string>
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* <key>next-automount</key>
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* <true/>
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* <key>next-partition-type</key>
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* <string>...</string>
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*
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* <!-- these are valid for MBR partition maps -->
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* <key>mbr-start-head</key>
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* <integer>...</integer>
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* <key>mbr-start-sector</key>
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* <integer>...</integer>
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* <key>mbr-start-cylinder</key>
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* <integer>...</integer>
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* <key>mbr-partition-type</key>
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* <integer>...</integer>
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* <key>mbr-end-head</key>
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* <integer>...</integer>
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* <key>mbr-end-sector</key>
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* <integer>...</integer>
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* <key>mbr-end-cylinder</key>
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* <integer>...</integer>
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* <key>mbr-active-partition</key>
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* <false/>
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*
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* <!-- these are valid for Apple partition maps -->
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* <key>apple-partition-type</key>
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* <string>...</string>
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* <!-- XXX What else do we need? wrstuden? -->
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*
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* <!-- these are valid for RISCiX partition maps -->
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* <key>riscix-partition-type</key>
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* <integer>...</integer>
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*
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* <!-- these are valid for MIPS/SGI partition maps -->
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* <key>mips-partition-type</key>
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* <integer>...</integer>
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*
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* <!-- SunOS 4 partition maps have no specific
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* additional information. Note, however,
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* that SunOS 4 partitions must begin on
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* cylinder boundaries. -->
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*
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* <!-- XXX Need Amiga partition map info -->
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*
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* <!-- these are valid for VTOC partition maps -->
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* <key>vtoc-tag</key>
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* <integer>...</integer>
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* <key>vtoc-unmount</key>
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* <false/>
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* <key>vtoc-read-only</key>
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* <false/>
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* <!-- XXX is this really part of the partition info? -->
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* <key>vtoc-timestamp</key>
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* <integer>...</integer>
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*
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* <!-- mvme68k partition maps use 4.4BSD partition
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* info stuffed into two different areas of the
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* disk information label recognized by BUG. -->
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*
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* <!-- XXX What else? -->
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* </dict>
|
| 429 |
*/
|
| 430 |
|
| 431 |
struct disk {
|
| 432 |
TAILQ_ENTRY(disk) dk_link; /* link in global disklist */
|
| 433 |
const char *dk_name; /* disk name */ |
| 434 |
prop_dictionary_t dk_info; /* reference to disk-info dictionary */
|
| 435 |
struct disk_geom dk_geom; /* cooked version of dk_info */ |
| 436 |
int dk_bopenmask; /* block devices open */ |
| 437 |
int dk_copenmask; /* character devices open */ |
| 438 |
int dk_openmask; /* composite (bopen|copen) */ |
| 439 |
int dk_state; /* label state ### */ |
| 440 |
int dk_blkshift; /* shift to convert DEV_BSIZE to blks */ |
| 441 |
int dk_byteshift; /* shift to convert bytes to blks */ |
| 442 |
|
| 443 |
/*
|
| 444 |
* Metrics data; note that some metrics may have no meaning
|
| 445 |
* on certain types of disks.
|
| 446 |
*/
|
| 447 |
struct io_stats *dk_stats;
|
| 448 |
|
| 449 |
const struct dkdriver *dk_driver; /* pointer to driver */ |
| 450 |
|
| 451 |
/*
|
| 452 |
* Information required to be the parent of a disk wedge.
|
| 453 |
*/
|
| 454 |
kmutex_t dk_rawlock; /* lock on these fields */
|
| 455 |
u_int dk_rawopens; /* # of openes of rawvp */
|
| 456 |
struct vnode *dk_rawvp; /* vnode for the RAW_PART bdev */ |
| 457 |
|
| 458 |
kmutex_t dk_openlock; /* lock on these and openmask */
|
| 459 |
u_int dk_nwedges; /* # of configured wedges */
|
| 460 |
/* all wedges on this disk */
|
| 461 |
LIST_HEAD(, dkwedge_softc) dk_wedges; |
| 462 |
|
| 463 |
/*
|
| 464 |
* Disk label information. Storage for the in-core disk label
|
| 465 |
* must be dynamically allocated, otherwise the size of this
|
| 466 |
* structure becomes machine-dependent.
|
| 467 |
*/
|
| 468 |
daddr_t dk_labelsector; /* sector containing label */
|
| 469 |
struct disklabel *dk_label; /* label */ |
| 470 |
struct cpu_disklabel *dk_cpulabel;
|
| 471 |
}; |
| 472 |
|
| 473 |
#ifdef _KERNEL
|
| 474 |
struct dkdriver {
|
| 475 |
void (*d_strategy)(struct buf *); |
| 476 |
void (*d_minphys)(struct buf *); |
| 477 |
int (*d_open)(dev_t, int, int, struct lwp *); |
| 478 |
int (*d_close)(dev_t, int, int, struct lwp *); |
| 479 |
int (*d_diskstart)(device_t, struct buf *); |
| 480 |
void (*d_iosize)(device_t, int *); |
| 481 |
int (*d_dumpblocks)(device_t, void *, daddr_t, int); |
| 482 |
int (*d_lastclose)(device_t);
|
| 483 |
int (*d_discard)(device_t, off_t, off_t);
|
| 484 |
}; |
| 485 |
#endif
|
| 486 |
|
| 487 |
/* states */
|
| 488 |
#define DK_CLOSED 0 /* drive is closed */ |
| 489 |
#define DK_WANTOPEN 1 /* drive being opened */ |
| 490 |
#define DK_WANTOPENRAW 2 /* drive being opened */ |
| 491 |
#define DK_RDLABEL 3 /* label being read */ |
| 492 |
#define DK_OPEN 4 /* label read, drive open */ |
| 493 |
#define DK_OPENRAW 5 /* open without label */ |
| 494 |
|
| 495 |
/*
|
| 496 |
* Bad sector lists per fixed disk
|
| 497 |
*/
|
| 498 |
struct disk_badsectors {
|
| 499 |
SLIST_ENTRY(disk_badsectors) dbs_next; |
| 500 |
daddr_t dbs_min; /* min. sector number */
|
| 501 |
daddr_t dbs_max; /* max. sector number */
|
| 502 |
struct timeval dbs_failedat; /* first failure at */ |
| 503 |
}; |
| 504 |
|
| 505 |
struct disk_badsecinfo {
|
| 506 |
uint32_t dbsi_bufsize; /* size of region pointed to */
|
| 507 |
uint32_t dbsi_skip; /* how many to skip past */
|
| 508 |
uint32_t dbsi_copied; /* how many got copied back */
|
| 509 |
uint32_t dbsi_left; /* remaining to copy */
|
| 510 |
void * dbsi_buffer; /* region to copy disk_badsectors to */ |
| 511 |
}; |
| 512 |
|
| 513 |
#define DK_STRATEGYNAMELEN 32 |
| 514 |
struct disk_strategy {
|
| 515 |
char dks_name[DK_STRATEGYNAMELEN]; /* name of strategy */ |
| 516 |
char *dks_param; /* notyet; should be NULL */ |
| 517 |
size_t dks_paramlen; /* notyet; should be 0 */
|
| 518 |
}; |
| 519 |
|
| 520 |
#define DK_BSIZE2BLKSHIFT(b) ((ffs((b) / DEV_BSIZE)) - 1) |
| 521 |
#define DK_BSIZE2BYTESHIFT(b) (ffs((b)) - 1) |
| 522 |
|
| 523 |
#ifdef _KERNEL
|
| 524 |
extern int disk_count; /* number of disks in global disklist */ |
| 525 |
|
| 526 |
struct proc;
|
| 527 |
|
| 528 |
void disk_attach(struct disk *); |
| 529 |
int disk_begindetach(struct disk *, int (*)(device_t), device_t, int); |
| 530 |
void disk_detach(struct disk *); |
| 531 |
void disk_init(struct disk *, const char *, const struct dkdriver *); |
| 532 |
void disk_destroy(struct disk *); |
| 533 |
void disk_busy(struct disk *); |
| 534 |
void disk_unbusy(struct disk *, long, int); |
| 535 |
bool disk_isbusy(struct disk *); |
| 536 |
struct disk *disk_find(const char *); |
| 537 |
int disk_ioctl(struct disk *, dev_t, u_long, void *, int, struct lwp *); |
| 538 |
void disk_set_info(device_t, struct disk *, const char *); |
| 539 |
|
| 540 |
void dkwedge_init(void); |
| 541 |
int dkwedge_add(struct dkwedge_info *); |
| 542 |
int dkwedge_del(struct dkwedge_info *); |
| 543 |
void dkwedge_delall(struct disk *); |
| 544 |
int dkwedge_list(struct disk *, struct dkwedge_list *, struct lwp *); |
| 545 |
void dkwedge_discover(struct disk *); |
| 546 |
int dkwedge_read(struct disk *, struct vnode *, daddr_t, void *, size_t); |
| 547 |
device_t dkwedge_find_by_wname(const char *); |
| 548 |
const char *dkwedge_get_parent_name(dev_t); |
| 549 |
void dkwedge_print_wnames(void); |
| 550 |
device_t dkwedge_find_partition(device_t, daddr_t, uint64_t); |
| 551 |
#endif
|
| 552 |
|
| 553 |
#endif /* _SYS_DISK_H_ */ |