/* $FreeBSD: src/sys/sys/ccdvar.h,v 1.11.2.1 2001/09/11 09:49:54 kris Exp $ */ /* $DragonFly: src/sys/sys/ccdvar.h,v 1.7 2007/07/12 00:25:57 dillon Exp $ */ /* $NetBSD: ccdvar.h,v 1.7.2.1 1995/10/12 21:30:18 thorpej Exp $ */ /* * Copyright (c) 1995 Jason R. Thorpe. * All rights reserved. * * 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 for the NetBSD Project * by Jason R. Thorpe. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 */ #ifndef _SYS_CCDVAR_H_ #define _SYS_CCDVAR_H_ /* * Original dynamic configuration support by: * Jason R. Thorpe <thorpej@nas.nasa.gov> * Numerical Aerodynamic Simulation Facility * Mail Stop 258-6 * NASA Ames Research Center * Moffett Field, CA 94035 */ #ifndef _SYS_TYPES_H_ #include <sys/types.h> #endif #ifndef _SYS_CONF_H_ #include <sys/conf.h> #endif #ifndef _SYS_DEVICESTAT_H_ #include <sys/devicestat.h> #endif #ifndef _SYS_DISK_H_ #include <sys/disk.h> #endif #ifndef _SYS_DISKSLICE_H_ #include <sys/diskslice.h> #endif #ifndef _SYS_IOCCOM_H_ #include <sys/ioccom.h> #endif /* * A concatenated disk is described at initialization time by this structure. */ struct ccddevice { int ccd_unit; /* logical unit of this ccd */ int ccd_interleave; /* interleave (DEV_BSIZE blocks) */ int ccd_flags; /* misc. information */ int ccd_unused01; /* disk number */ struct vnode **ccd_vpp; /* array of component vnodes */ char **ccd_cpp; /* array of component pathnames */ 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 */ u_int64_t ccio_size; /* (returned) size of ccd in sectors */ }; /* 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 /* use mirroring */ #define CCDF_PARITY 0x08 /* use parity (RAID level 5) */ /* Mask of user-settable ccd flags. */ #define CCDF_USERMASK (CCDF_SWAP|CCDF_UNIFORM|CCDF_MIRROR|CCDF_PARITY) /* * Component info table. * Describes a single component of a concatenated disk. */ struct cdev; struct ccdcinfo { struct vnode *ci_vp; /* device's vnode */ struct cdev *ci_dev; /* XXX: device's dev_t */ u_int64_t ci_size; /* size in sectors */ u_int64_t ci_skip; /* start skip in sectors */ char *ci_path; /* path to component */ size_t ci_pathlen; /* length of component path */ }; /* * 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 { int ii_ndisk; /* # of disks range is interleaved over */ u_int64_t ii_startblk; /* starting scaled block # for range */ u_int64_t ii_startoff; /* starting component offset (block #) */ int *ii_index; /* ordered list of components in range */ }; /* * 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 { int sc_unit; /* logical unit number */ int sc_flags; /* flags */ int sc_cflags; /* configuration flags */ u_int64_t sc_size; /* size of ccd in sectors */ int sc_ileave; /* interleave */ int sc_maxiosize; /* maximum I/O size */ u_int sc_nccdisks; /* number of components */ #define CCD_MAXNDISKS 65536 struct lock sc_lock; struct ccdcinfo *sc_cinfo; /* component info */ struct ccdiinfo *sc_itable; /* interleave table */ struct devstat device_stats; /* device statistics */ struct ccdgeom sc_geom; /* pseudo geometry info */ struct disk sc_disk; /* disk overlay for ccd */ struct cdev *sc_dev; /* raw ccd device */ int sc_pick; /* side of mirror picked */ off_t sc_blk[2]; /* mirror localization */ }; /* sc_flags */ #define CCDF_INITED 0x01 /* unit has been initialized */ #define CCDF_UNUSED02 0x02 /* label area is writable */ #define CCDF_UNUSED04 0x04 /* unit is currently being labelled */ /* * 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 */ #endif
