/* $OpenBSD: ccdvar.h,v 1.7 2005/02/24 19:36:39 mickey Exp $ */ /* $NetBSD: ccdvar.h,v 1.11 1996/02/28 01:08:32 thorpej Exp $ */ /*- * Copyright (c) 1996 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 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 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. */ /* * 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 $Hdr: cdvar.h 1.1 90/07/09$ * * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 */ /* * Dynamic configuration and disklabel support by: * Jason R. Thorpe * Numerical Aerodynamic Simulation Facility * Mail Stop 258-6 * NASA Ames Research Center * Moffett Field, CA 94035 */ /* * A concatenated disk is described at initialization time by this structure. */ struct ccddevice { struct vnode **ccd_vpp; /* array of component vnodes */ char **ccd_cpp; /* array of component pathnames */ int ccd_unit; /* logical unit of this ccd */ int ccd_interleave; /* interleave (DEV_BSIZE blocks) */ int ccd_flags; /* misc. information */ int ccd_ndev; /* number of component devices */ }; /* * This structure is used to configure a ccd via ioctl(2). */ struct ccd_ioctl { char **ccio_disks; /* pointer to component paths */ u_int ccio_ndisks; /* number of disks to concatenate */ int ccio_ileave; /* interleave (DEV_BSIZE blocks) */ int ccio_flags; /* misc. information */ int ccio_unit; /* unit number: use varies */ size_t ccio_size; /* (returned) size of ccd */ }; /* ccd_flags */ #define CCDF_SWAP 0x01 /* interleave should be dmmax */ #define CCDF_UNIFORM 0x02 /* use LCCD of sizes for uniform interleave */ #define CCDF_MIRROR 0x04 /* enable data mirroring */ #define CCDF_OLD 0x08 /* use slower but less restrictive I/O code */ #define CCDF_BITS \ "\020\01swap\02uniform\03mirror\04old" /* Mask of user-settable ccd flags. */ #define CCDF_USERMASK \ (CCDF_SWAP|CCDF_UNIFORM|CCDF_MIRROR|CCDF_OLD) /* * Component info table. * Describes a single component of a concatenated disk. */ struct ccdcinfo { struct vnode *ci_vp; /* device's vnode */ char *ci_path; /* path to component */ size_t ci_size; /* size */ size_t ci_pathlen; /* length of component path */ dev_t ci_dev; /* XXX: device's dev_t */ int ci_flags; /* see below */ }; #define CCIF_FAILED 0x01 /* had a B_ERROR on this one */ /* * Interleave description table. * Computed at boot time to speed irregular-interleave lookups. * The idea is that we interleave in "groups". First we interleave * evenly over all component disks up to the size of the smallest * component (the first group), then we interleave evenly over all * remaining disks up to the size of the next-smallest (second group), * and so on. * * Each table entry describes the interleave characteristics of one * of these groups. For example if a concatenated disk consisted of * three components of 5, 3, and 7 DEV_BSIZE blocks interleaved at * DEV_BSIZE (1), the table would have three entries: * * ndisk startblk startoff dev * 3 0 0 0, 1, 2 * 2 9 3 0, 2 * 1 13 5 2 * 0 - - - * * which says that the first nine blocks (0-8) are interleaved over * 3 disks (0, 1, 2) starting at block offset 0 on any component disk, * the next 4 blocks (9-12) are interleaved over 2 disks (0, 2) starting * at component block 3, and the remaining blocks (13-14) are on disk * 2 starting at offset 5. */ struct ccdiinfo { daddr_t ii_startblk; /* starting scaled block # for range */ daddr_t ii_startoff; /* starting component offset (block #) */ int *ii_index; /* ordered list of components in range */ int *ii_parity; /* list of parity shifts */ int ii_ndisk; /* # of disks range is interleaved over */ }; /* * Concatenated disk pseudo-geometry information. */ struct ccdgeom { u_int32_t ccg_secsize; /* # bytes per sector */ u_int32_t ccg_nsectors; /* # data sectors per track */ u_int32_t ccg_ntracks; /* # tracks per cylinder */ u_int32_t ccg_ncylinders; /* # cylinders per unit */ }; /* * A concatenated disk is described after initialization by this structure. */ struct ccd_softc { struct disk sc_dkdev; /* generic disk device info */ struct ccdgeom sc_geom; /* pseudo geometry info */ struct ccdcinfo *sc_cinfo; /* component info */ struct ccdiinfo *sc_itable; /* interleave table */ char sc_xname[8]; /* XXX external name */ size_t sc_size; /* size of ccd */ int sc_flags; /* flags */ int sc_cflags; /* copy of ccd_flags */ int sc_ileave; /* interleave */ u_int sc_nccdisks; /* # of components */ u_int sc_nccunits; /* # of components for data */ }; /* sc_flags */ #define CCDF_INITED 0x01 /* unit has been initialized */ #define CCDF_WLABEL 0x02 /* label area is writable */ #define CCDF_LABELLING 0x04 /* unit is currently being labelled */ #define CCDF_WANTED 0x40 /* someone is waiting to obtain a lock */ #define CCDF_LOCKED 0x80 /* unit is locked */ /* * Before you can use a unit, it must be configured with CCDIOCSET. * The configuration persists across opens and closes of the device; * a CCDIOCCLR must be used to reset a configuration. An attempt to * CCDIOCSET an already active unit will return EBUSY. Attempts to * CCDIOCCLR an inactive unit will return ENXIO. */ #define CCDIOCSET _IOWR('F', 16, struct ccd_ioctl) /* enable ccd */ #define CCDIOCCLR _IOW('F', 17, struct ccd_ioctl) /* disable ccd */