/* $NetBSD: ccdvar.h,v 1.35 2015/09/06 06:00:59 dholland Exp $ */ /*- * Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 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 $Hdr: cdvar.h 1.1 90/07/09$ * * @(#)cdvar.h 8.1 (Berkeley) 6/10/93 */ #ifndef _DEV_CCDVAR_H_ #define _DEV_CCDVAR_H_ #include #include #include #include #include /* * 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 */ /* * 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; /* see sc_flags below */ int ccio_unit; /* unit number: use varies */ uint64_t ccio_size; /* (returned) size of ccd */ }; /* * Component info table. * Describes a single component of a concatenated disk. */ struct ccdcinfo { struct vnode *ci_vp; /* device's vnode */ dev_t ci_dev; /* XXX: device's dev_t */ uint64_t ci_size; /* size */ 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 */ 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 */ size_t ii_indexsz; /* size of memory area */ }; /* * 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 */ }; struct ccdbuf; /* * A concatenated disk is described after initialization by this structure. */ struct ccd_softc { int sc_unit; int sc_flags; /* flags */ uint64_t sc_size; /* size of ccd */ int sc_ileave; /* interleave */ u_int sc_nccdisks; /* number of components */ #define CCD_MAXNDISKS 65536 struct ccdcinfo *sc_cinfo; /* component info */ struct ccdiinfo *sc_itable; /* interleave table */ struct ccdgeom sc_geom; /* pseudo geometry info */ char sc_xname[8]; /* XXX external name */ struct disk sc_dkdev; /* generic disk device info */ kmutex_t sc_dvlock; /* lock on device node */ struct bufq_state *sc_bufq; /* buffer queue */ kmutex_t *sc_iolock; /* lock on I/O start/stop */ kcondvar_t sc_stop; /* when inflight goes zero */ struct lwp *sc_thread; /* for deferred I/O */ kcondvar_t sc_push; /* for deferred I/O */ bool sc_zap; /* for deferred I/O */ LIST_ENTRY(ccd_softc) sc_link; }; /* sc_flags */ #define CCDF_UNIFORM 0x002 /* use LCCD of sizes for uniform interleave */ #define CCDF_NOLABEL 0x004 /* ignore on-disk (raw) disklabel */ #define CCDF_INITED 0x010 /* unit has been initialized */ #define CCDF_WLABEL 0x020 /* label area is writable */ #define CCDF_LABELLING 0x040 /* unit is currently being labelled */ #define CCDF_KLABEL 0x080 /* keep label on close */ #define CCDF_VLABEL 0x100 /* label is valid */ #define CCDF_RLABEL 0x200 /* currently reading label */ /* Mask of user-settable ccd flags. */ #define CCDF_USERMASK (CCDF_UNIFORM|CCDF_NOLABEL) /* * 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 */ #if defined(COMPAT_60) && !defined(_LP64) /* * Old version with incorrect ccio_size */ struct ccd_ioctl_60 { 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; /* see sc_flags below */ int ccio_unit; /* unit number: use varies */ size_t ccio_size; /* (returned) size of ccd */ }; #define CCDIOCSET_60 _IOWR('F', 16, struct ccd_ioctl_60) /* enable ccd */ #define CCDIOCCLR_60 _IOW('F', 17, struct ccd_ioctl_60) /* disable ccd */ #endif /* COMPAT_60 && !LP64*/ /* * Sysctl information */ struct ccddiskinfo { int ccd_ileave; u_int ccd_ndisks; uint64_t ccd_size; int ccd_flags; }; #endif /* _DEV_CCDVAR_H_ */