fd34ea77eb
kmem_alloc() with KM_SLEEP kmem_zalloc() with KM_SLEEP percpu_alloc() pserialize_create() psref_class_create() all of these paths include an assertion that the allocation has not failed, so callers should not assert that again.
1907 lines
45 KiB
C
1907 lines
45 KiB
C
/* $NetBSD: ccd.c,v 1.172 2017/06/01 02:45:08 chs Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998, 1999, 2007, 2009 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, and by Andrew Doran.
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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) 1988 University of Utah.
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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: Utah $Hdr: cd.c 1.6 90/11/28$
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*
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* @(#)cd.c 8.2 (Berkeley) 11/16/93
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*/
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/*
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* "Concatenated" disk driver.
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*
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* Notes on concurrency:
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*
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* => sc_dvlock serializes access to the device nodes, excluding block I/O.
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*
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* => sc_iolock serializes access to (sc_flags & CCDF_INITED), disk stats,
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* sc_stop, sc_bufq and b_resid from master buffers.
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*
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* => a combination of CCDF_INITED, sc_inflight, and sc_iolock is used to
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* serialize I/O and configuration changes.
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*
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* => the in-core disk label does not change while the device is open.
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*
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* On memory consumption: ccd fans out I/O requests and so needs to
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* allocate memory. If the system is desperately low on memory, we
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* single thread I/O.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ccd.c,v 1.172 2017/06/01 02:45:08 chs Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_compat_netbsd.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/errno.h>
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#include <sys/buf.h>
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#include <sys/kmem.h>
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#include <sys/pool.h>
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#include <sys/module.h>
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#include <sys/namei.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/disklabel.h>
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#include <sys/device.h>
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#include <sys/disk.h>
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#include <sys/syslog.h>
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#include <sys/fcntl.h>
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#include <sys/vnode.h>
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#include <sys/conf.h>
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#include <sys/mutex.h>
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#include <sys/queue.h>
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#include <sys/kauth.h>
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#include <sys/kthread.h>
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#include <sys/bufq.h>
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#include <sys/sysctl.h>
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#include <uvm/uvm_extern.h>
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#include <dev/ccdvar.h>
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#include <dev/dkvar.h>
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#include <miscfs/specfs/specdev.h> /* for v_rdev */
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#include "ioconf.h"
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#if defined(CCDDEBUG) && !defined(DEBUG)
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#define DEBUG
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#endif
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#ifdef DEBUG
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#define CCDB_FOLLOW 0x01
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#define CCDB_INIT 0x02
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#define CCDB_IO 0x04
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#define CCDB_LABEL 0x08
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#define CCDB_VNODE 0x10
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int ccddebug = 0x00;
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#endif
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#define ccdunit(x) DISKUNIT(x)
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struct ccdbuf {
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struct buf cb_buf; /* new I/O buf */
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struct buf *cb_obp; /* ptr. to original I/O buf */
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struct ccd_softc *cb_sc; /* pointer to ccd softc */
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int cb_comp; /* target component */
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SIMPLEQ_ENTRY(ccdbuf) cb_q; /* fifo of component buffers */
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};
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/* component buffer pool */
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static pool_cache_t ccd_cache;
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#define CCD_GETBUF() pool_cache_get(ccd_cache, PR_WAITOK)
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#define CCD_PUTBUF(cbp) pool_cache_put(ccd_cache, cbp)
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#define CCDLABELDEV(dev) \
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(MAKEDISKDEV(major((dev)), ccdunit((dev)), RAW_PART))
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/* called by main() at boot time */
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void ccddetach(void);
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/* called by biodone() at interrupt time */
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static void ccdiodone(struct buf *);
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static void ccdinterleave(struct ccd_softc *);
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static int ccdinit(struct ccd_softc *, char **, struct vnode **,
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struct lwp *);
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static struct ccdbuf *ccdbuffer(struct ccd_softc *, struct buf *,
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daddr_t, void *, long);
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static void ccdgetdefaultlabel(struct ccd_softc *, struct disklabel *);
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static void ccdgetdisklabel(dev_t);
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static void ccdmakedisklabel(struct ccd_softc *);
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static void ccdstart(struct ccd_softc *);
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static void ccdthread(void *);
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static dev_type_open(ccdopen);
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static dev_type_close(ccdclose);
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static dev_type_read(ccdread);
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static dev_type_write(ccdwrite);
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static dev_type_ioctl(ccdioctl);
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static dev_type_strategy(ccdstrategy);
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static dev_type_size(ccdsize);
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const struct bdevsw ccd_bdevsw = {
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.d_open = ccdopen,
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.d_close = ccdclose,
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.d_strategy = ccdstrategy,
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.d_ioctl = ccdioctl,
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.d_dump = nodump,
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.d_psize = ccdsize,
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.d_discard = nodiscard,
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.d_flag = D_DISK | D_MPSAFE
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};
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const struct cdevsw ccd_cdevsw = {
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.d_open = ccdopen,
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.d_close = ccdclose,
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.d_read = ccdread,
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.d_write = ccdwrite,
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.d_ioctl = ccdioctl,
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.d_stop = nostop,
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.d_tty = notty,
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.d_poll = nopoll,
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.d_mmap = nommap,
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.d_kqfilter = nokqfilter,
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.d_discard = nodiscard,
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.d_flag = D_DISK | D_MPSAFE
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};
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#ifdef DEBUG
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static void printiinfo(struct ccdiinfo *);
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#endif
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static LIST_HEAD(, ccd_softc) ccds = LIST_HEAD_INITIALIZER(ccds);
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static kmutex_t ccd_lock;
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static size_t ccd_nactive = 0;
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#ifdef _MODULE
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static struct sysctllog *ccd_clog;
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#endif
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SYSCTL_SETUP_PROTO(sysctl_kern_ccd_setup);
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static struct ccd_softc *
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ccdcreate(int unit) {
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struct ccd_softc *sc = kmem_zalloc(sizeof(*sc), KM_SLEEP);
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/* Initialize per-softc structures. */
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snprintf(sc->sc_xname, sizeof(sc->sc_xname), "ccd%d", unit);
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sc->sc_unit = unit;
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mutex_init(&sc->sc_dvlock, MUTEX_DEFAULT, IPL_NONE);
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sc->sc_iolock = mutex_obj_alloc(MUTEX_DEFAULT, IPL_NONE);
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cv_init(&sc->sc_stop, "ccdstop");
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cv_init(&sc->sc_push, "ccdthr");
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disk_init(&sc->sc_dkdev, sc->sc_xname, NULL); /* XXX */
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return sc;
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}
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static void
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ccddestroy(struct ccd_softc *sc) {
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mutex_obj_free(sc->sc_iolock);
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mutex_exit(&sc->sc_dvlock);
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mutex_destroy(&sc->sc_dvlock);
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cv_destroy(&sc->sc_stop);
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cv_destroy(&sc->sc_push);
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disk_destroy(&sc->sc_dkdev);
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kmem_free(sc, sizeof(*sc));
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}
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static struct ccd_softc *
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ccdget(int unit, int make) {
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struct ccd_softc *sc;
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if (unit < 0) {
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#ifdef DIAGNOSTIC
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panic("%s: unit %d!", __func__, unit);
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#endif
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return NULL;
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}
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mutex_enter(&ccd_lock);
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LIST_FOREACH(sc, &ccds, sc_link) {
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if (sc->sc_unit == unit) {
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mutex_exit(&ccd_lock);
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return sc;
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}
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}
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mutex_exit(&ccd_lock);
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if (!make)
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return NULL;
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if ((sc = ccdcreate(unit)) == NULL)
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return NULL;
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mutex_enter(&ccd_lock);
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LIST_INSERT_HEAD(&ccds, sc, sc_link);
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ccd_nactive++;
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mutex_exit(&ccd_lock);
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return sc;
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}
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static void
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ccdput(struct ccd_softc *sc) {
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mutex_enter(&ccd_lock);
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LIST_REMOVE(sc, sc_link);
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ccd_nactive--;
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mutex_exit(&ccd_lock);
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ccddestroy(sc);
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}
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|
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/*
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* Called by main() during pseudo-device attachment. All we need
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* to do is allocate enough space for devices to be configured later.
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*/
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void
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ccdattach(int num)
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{
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mutex_init(&ccd_lock, MUTEX_DEFAULT, IPL_NONE);
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|
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/* Initialize the component buffer pool. */
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ccd_cache = pool_cache_init(sizeof(struct ccdbuf), 0,
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0, 0, "ccdbuf", NULL, IPL_BIO, NULL, NULL, NULL);
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}
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|
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void
|
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ccddetach(void)
|
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{
|
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pool_cache_destroy(ccd_cache);
|
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mutex_destroy(&ccd_lock);
|
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}
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|
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static int
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ccdinit(struct ccd_softc *cs, char **cpaths, struct vnode **vpp,
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struct lwp *l)
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{
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struct ccdcinfo *ci = NULL;
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int ix;
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struct ccdgeom *ccg = &cs->sc_geom;
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char *tmppath;
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int error, path_alloced;
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uint64_t psize, minsize;
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unsigned secsize, maxsecsize;
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struct disk_geom *dg;
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|
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#ifdef DEBUG
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if (ccddebug & (CCDB_FOLLOW|CCDB_INIT))
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printf("%s: ccdinit\n", cs->sc_xname);
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#endif
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|
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/* Allocate space for the component info. */
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cs->sc_cinfo = kmem_alloc(cs->sc_nccdisks * sizeof(*cs->sc_cinfo),
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KM_SLEEP);
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tmppath = kmem_alloc(MAXPATHLEN, KM_SLEEP);
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cs->sc_size = 0;
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|
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/*
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* Verify that each component piece exists and record
|
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* relevant information about it.
|
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*/
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maxsecsize = 0;
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minsize = 0;
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for (ix = 0, path_alloced = 0; ix < cs->sc_nccdisks; ix++) {
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ci = &cs->sc_cinfo[ix];
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ci->ci_vp = vpp[ix];
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|
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/*
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* Copy in the pathname of the component.
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*/
|
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memset(tmppath, 0, MAXPATHLEN); /* sanity */
|
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error = copyinstr(cpaths[ix], tmppath,
|
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MAXPATHLEN, &ci->ci_pathlen);
|
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if (ci->ci_pathlen == 0)
|
|
error = EINVAL;
|
|
if (error) {
|
|
#ifdef DEBUG
|
|
if (ccddebug & (CCDB_FOLLOW|CCDB_INIT))
|
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printf("%s: can't copy path, error = %d\n",
|
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cs->sc_xname, error);
|
|
#endif
|
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goto out;
|
|
}
|
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ci->ci_path = kmem_alloc(ci->ci_pathlen, KM_SLEEP);
|
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memcpy(ci->ci_path, tmppath, ci->ci_pathlen);
|
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path_alloced++;
|
|
|
|
/*
|
|
* XXX: Cache the component's dev_t.
|
|
*/
|
|
ci->ci_dev = vpp[ix]->v_rdev;
|
|
|
|
/*
|
|
* Get partition information for the component.
|
|
*/
|
|
error = getdisksize(vpp[ix], &psize, &secsize);
|
|
if (error) {
|
|
#ifdef DEBUG
|
|
if (ccddebug & (CCDB_FOLLOW|CCDB_INIT))
|
|
printf("%s: %s: disksize failed, error = %d\n",
|
|
cs->sc_xname, ci->ci_path, error);
|
|
#endif
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Calculate the size, truncating to an interleave
|
|
* boundary if necessary.
|
|
*/
|
|
maxsecsize = secsize > maxsecsize ? secsize : maxsecsize;
|
|
if (cs->sc_ileave > 1)
|
|
psize -= psize % cs->sc_ileave;
|
|
|
|
if (psize == 0) {
|
|
#ifdef DEBUG
|
|
if (ccddebug & (CCDB_FOLLOW|CCDB_INIT))
|
|
printf("%s: %s: size == 0\n",
|
|
cs->sc_xname, ci->ci_path);
|
|
#endif
|
|
error = ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
if (minsize == 0 || psize < minsize)
|
|
minsize = psize;
|
|
ci->ci_size = psize;
|
|
cs->sc_size += psize;
|
|
}
|
|
|
|
/*
|
|
* Don't allow the interleave to be smaller than
|
|
* the biggest component sector.
|
|
*/
|
|
if ((cs->sc_ileave > 0) &&
|
|
(cs->sc_ileave < (maxsecsize / DEV_BSIZE))) {
|
|
#ifdef DEBUG
|
|
if (ccddebug & (CCDB_FOLLOW|CCDB_INIT))
|
|
printf("%s: interleave must be at least %d\n",
|
|
cs->sc_xname, (maxsecsize / DEV_BSIZE));
|
|
#endif
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If uniform interleave is desired set all sizes to that of
|
|
* the smallest component.
|
|
*/
|
|
if (cs->sc_flags & CCDF_UNIFORM) {
|
|
for (ci = cs->sc_cinfo;
|
|
ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++)
|
|
ci->ci_size = minsize;
|
|
|
|
cs->sc_size = cs->sc_nccdisks * minsize;
|
|
}
|
|
|
|
/*
|
|
* Construct the interleave table.
|
|
*/
|
|
ccdinterleave(cs);
|
|
|
|
/*
|
|
* Create pseudo-geometry based on 1MB cylinders. It's
|
|
* pretty close.
|
|
*/
|
|
ccg->ccg_secsize = DEV_BSIZE;
|
|
ccg->ccg_ntracks = 1;
|
|
ccg->ccg_nsectors = 1024 * (1024 / ccg->ccg_secsize);
|
|
ccg->ccg_ncylinders = cs->sc_size / ccg->ccg_nsectors;
|
|
|
|
dg = &cs->sc_dkdev.dk_geom;
|
|
memset(dg, 0, sizeof(*dg));
|
|
dg->dg_secperunit = cs->sc_size;
|
|
dg->dg_secsize = ccg->ccg_secsize;
|
|
dg->dg_nsectors = ccg->ccg_nsectors;
|
|
dg->dg_ntracks = ccg->ccg_ntracks;
|
|
dg->dg_ncylinders = ccg->ccg_ncylinders;
|
|
|
|
if (cs->sc_ileave > 0)
|
|
aprint_normal("%s: Interleaving %d component%s "
|
|
"(%d block interleave)\n", cs->sc_xname,
|
|
cs->sc_nccdisks, (cs->sc_nccdisks != 0 ? "s" : ""),
|
|
cs->sc_ileave);
|
|
else
|
|
aprint_normal("%s: Concatenating %d component%s\n",
|
|
cs->sc_xname,
|
|
cs->sc_nccdisks, (cs->sc_nccdisks != 0 ? "s" : ""));
|
|
for (ix = 0; ix < cs->sc_nccdisks; ix++) {
|
|
ci = &cs->sc_cinfo[ix];
|
|
aprint_normal("%s: %s (%ju blocks)\n", cs->sc_xname,
|
|
ci->ci_path, (uintmax_t)ci->ci_size);
|
|
}
|
|
aprint_normal("%s: total %ju blocks\n", cs->sc_xname, cs->sc_size);
|
|
|
|
/*
|
|
* Create thread to handle deferred I/O.
|
|
*/
|
|
cs->sc_zap = false;
|
|
error = kthread_create(PRI_BIO, KTHREAD_MPSAFE, NULL, ccdthread,
|
|
cs, &cs->sc_thread, "%s", cs->sc_xname);
|
|
if (error) {
|
|
printf("ccdinit: can't create thread: %d\n", error);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Only now that everything is set up can we enable the device.
|
|
*/
|
|
mutex_enter(cs->sc_iolock);
|
|
cs->sc_flags |= CCDF_INITED;
|
|
mutex_exit(cs->sc_iolock);
|
|
kmem_free(tmppath, MAXPATHLEN);
|
|
return (0);
|
|
|
|
out:
|
|
for (ix = 0; ix < path_alloced; ix++) {
|
|
kmem_free(cs->sc_cinfo[ix].ci_path,
|
|
cs->sc_cinfo[ix].ci_pathlen);
|
|
}
|
|
kmem_free(cs->sc_cinfo, cs->sc_nccdisks * sizeof(struct ccdcinfo));
|
|
kmem_free(tmppath, MAXPATHLEN);
|
|
return (error);
|
|
}
|
|
|
|
static void
|
|
ccdinterleave(struct ccd_softc *cs)
|
|
{
|
|
struct ccdcinfo *ci, *smallci;
|
|
struct ccdiinfo *ii;
|
|
daddr_t bn, lbn;
|
|
int ix;
|
|
u_long size;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_INIT)
|
|
printf("ccdinterleave(%p): ileave %d\n", cs, cs->sc_ileave);
|
|
#endif
|
|
/*
|
|
* Allocate an interleave table.
|
|
* Chances are this is too big, but we don't care.
|
|
*/
|
|
size = (cs->sc_nccdisks + 1) * sizeof(struct ccdiinfo);
|
|
cs->sc_itable = kmem_zalloc(size, KM_SLEEP);
|
|
|
|
/*
|
|
* Trivial case: no interleave (actually interleave of disk size).
|
|
* Each table entry represents a single component in its entirety.
|
|
*/
|
|
if (cs->sc_ileave == 0) {
|
|
bn = 0;
|
|
ii = cs->sc_itable;
|
|
|
|
for (ix = 0; ix < cs->sc_nccdisks; ix++) {
|
|
/* Allocate space for ii_index. */
|
|
ii->ii_indexsz = sizeof(int);
|
|
ii->ii_index = kmem_alloc(ii->ii_indexsz, KM_SLEEP);
|
|
ii->ii_ndisk = 1;
|
|
ii->ii_startblk = bn;
|
|
ii->ii_startoff = 0;
|
|
ii->ii_index[0] = ix;
|
|
bn += cs->sc_cinfo[ix].ci_size;
|
|
ii++;
|
|
}
|
|
ii->ii_ndisk = 0;
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_INIT)
|
|
printiinfo(cs->sc_itable);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* The following isn't fast or pretty; it doesn't have to be.
|
|
*/
|
|
size = 0;
|
|
bn = lbn = 0;
|
|
for (ii = cs->sc_itable; ; ii++) {
|
|
/* Allocate space for ii_index. */
|
|
ii->ii_indexsz = sizeof(int) * cs->sc_nccdisks;
|
|
ii->ii_index = kmem_alloc(ii->ii_indexsz, KM_SLEEP);
|
|
|
|
/*
|
|
* Locate the smallest of the remaining components
|
|
*/
|
|
smallci = NULL;
|
|
for (ci = cs->sc_cinfo;
|
|
ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++)
|
|
if (ci->ci_size > size &&
|
|
(smallci == NULL ||
|
|
ci->ci_size < smallci->ci_size))
|
|
smallci = ci;
|
|
|
|
/*
|
|
* Nobody left, all done
|
|
*/
|
|
if (smallci == NULL) {
|
|
ii->ii_ndisk = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Record starting logical block and component offset
|
|
*/
|
|
ii->ii_startblk = bn / cs->sc_ileave;
|
|
ii->ii_startoff = lbn;
|
|
|
|
/*
|
|
* Determine how many disks take part in this interleave
|
|
* and record their indices.
|
|
*/
|
|
ix = 0;
|
|
for (ci = cs->sc_cinfo;
|
|
ci < &cs->sc_cinfo[cs->sc_nccdisks]; ci++)
|
|
if (ci->ci_size >= smallci->ci_size)
|
|
ii->ii_index[ix++] = ci - cs->sc_cinfo;
|
|
ii->ii_ndisk = ix;
|
|
bn += ix * (smallci->ci_size - size);
|
|
lbn = smallci->ci_size / cs->sc_ileave;
|
|
size = smallci->ci_size;
|
|
}
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_INIT)
|
|
printiinfo(cs->sc_itable);
|
|
#endif
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
ccdopen(dev_t dev, int flags, int fmt, struct lwp *l)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
struct ccd_softc *cs;
|
|
struct disklabel *lp;
|
|
int error = 0, part, pmask;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdopen(0x%"PRIx64", 0x%x)\n", dev, flags);
|
|
#endif
|
|
if ((cs = ccdget(unit, 1)) == NULL)
|
|
return ENXIO;
|
|
|
|
mutex_enter(&cs->sc_dvlock);
|
|
|
|
lp = cs->sc_dkdev.dk_label;
|
|
|
|
part = DISKPART(dev);
|
|
pmask = (1 << part);
|
|
|
|
/*
|
|
* If we're initialized, check to see if there are any other
|
|
* open partitions. If not, then it's safe to update
|
|
* the in-core disklabel. Only read the disklabel if it is
|
|
* not already valid.
|
|
*/
|
|
if ((cs->sc_flags & (CCDF_INITED|CCDF_VLABEL)) == CCDF_INITED &&
|
|
cs->sc_dkdev.dk_openmask == 0)
|
|
ccdgetdisklabel(dev);
|
|
|
|
/* Check that the partition exists. */
|
|
if (part != RAW_PART) {
|
|
if (((cs->sc_flags & CCDF_INITED) == 0) ||
|
|
((part >= lp->d_npartitions) ||
|
|
(lp->d_partitions[part].p_fstype == FS_UNUSED))) {
|
|
error = ENXIO;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Prevent our unit from being unconfigured while open. */
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
cs->sc_dkdev.dk_copenmask |= pmask;
|
|
break;
|
|
|
|
case S_IFBLK:
|
|
cs->sc_dkdev.dk_bopenmask |= pmask;
|
|
break;
|
|
}
|
|
cs->sc_dkdev.dk_openmask =
|
|
cs->sc_dkdev.dk_copenmask | cs->sc_dkdev.dk_bopenmask;
|
|
|
|
done:
|
|
mutex_exit(&cs->sc_dvlock);
|
|
return (error);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
ccdclose(dev_t dev, int flags, int fmt, struct lwp *l)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
struct ccd_softc *cs;
|
|
int part;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdclose(0x%"PRIx64", 0x%x)\n", dev, flags);
|
|
#endif
|
|
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return ENXIO;
|
|
|
|
mutex_enter(&cs->sc_dvlock);
|
|
|
|
part = DISKPART(dev);
|
|
|
|
/* ...that much closer to allowing unconfiguration... */
|
|
switch (fmt) {
|
|
case S_IFCHR:
|
|
cs->sc_dkdev.dk_copenmask &= ~(1 << part);
|
|
break;
|
|
|
|
case S_IFBLK:
|
|
cs->sc_dkdev.dk_bopenmask &= ~(1 << part);
|
|
break;
|
|
}
|
|
cs->sc_dkdev.dk_openmask =
|
|
cs->sc_dkdev.dk_copenmask | cs->sc_dkdev.dk_bopenmask;
|
|
|
|
if (cs->sc_dkdev.dk_openmask == 0) {
|
|
if ((cs->sc_flags & CCDF_KLABEL) == 0)
|
|
cs->sc_flags &= ~CCDF_VLABEL;
|
|
}
|
|
|
|
mutex_exit(&cs->sc_dvlock);
|
|
return (0);
|
|
}
|
|
|
|
static bool
|
|
ccdbackoff(struct ccd_softc *cs)
|
|
{
|
|
|
|
/* XXX Arbitrary, should be a uvm call. */
|
|
return uvmexp.free < (uvmexp.freemin >> 1) &&
|
|
disk_isbusy(&cs->sc_dkdev);
|
|
}
|
|
|
|
static void
|
|
ccdthread(void *cookie)
|
|
{
|
|
struct ccd_softc *cs;
|
|
|
|
cs = cookie;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdthread: hello\n");
|
|
#endif
|
|
|
|
mutex_enter(cs->sc_iolock);
|
|
while (__predict_true(!cs->sc_zap)) {
|
|
if (bufq_peek(cs->sc_bufq) == NULL) {
|
|
/* Nothing to do. */
|
|
cv_wait(&cs->sc_push, cs->sc_iolock);
|
|
continue;
|
|
}
|
|
if (ccdbackoff(cs)) {
|
|
/* Wait for memory to become available. */
|
|
(void)cv_timedwait(&cs->sc_push, cs->sc_iolock, 1);
|
|
continue;
|
|
}
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdthread: dispatching I/O\n");
|
|
#endif
|
|
ccdstart(cs);
|
|
mutex_enter(cs->sc_iolock);
|
|
}
|
|
cs->sc_thread = NULL;
|
|
mutex_exit(cs->sc_iolock);
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdthread: goodbye\n");
|
|
#endif
|
|
kthread_exit(0);
|
|
}
|
|
|
|
static void
|
|
ccdstrategy(struct buf *bp)
|
|
{
|
|
int unit = ccdunit(bp->b_dev);
|
|
struct ccd_softc *cs;
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return;
|
|
|
|
/* Must be open or reading label. */
|
|
KASSERT(cs->sc_dkdev.dk_openmask != 0 ||
|
|
(cs->sc_flags & CCDF_RLABEL) != 0);
|
|
|
|
mutex_enter(cs->sc_iolock);
|
|
/* Synchronize with device init/uninit. */
|
|
if (__predict_false((cs->sc_flags & CCDF_INITED) == 0)) {
|
|
mutex_exit(cs->sc_iolock);
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdstrategy: unit %d: not inited\n", unit);
|
|
#endif
|
|
bp->b_error = ENXIO;
|
|
bp->b_resid = bp->b_bcount;
|
|
biodone(bp);
|
|
return;
|
|
}
|
|
|
|
/* Defer to thread if system is low on memory. */
|
|
bufq_put(cs->sc_bufq, bp);
|
|
if (__predict_false(ccdbackoff(cs))) {
|
|
mutex_exit(cs->sc_iolock);
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdstrategy: holding off on I/O\n");
|
|
#endif
|
|
return;
|
|
}
|
|
ccdstart(cs);
|
|
}
|
|
|
|
static void
|
|
ccdstart(struct ccd_softc *cs)
|
|
{
|
|
daddr_t blkno;
|
|
int wlabel;
|
|
struct disklabel *lp;
|
|
long bcount, rcount;
|
|
struct ccdbuf *cbp;
|
|
char *addr;
|
|
daddr_t bn;
|
|
vnode_t *vp;
|
|
buf_t *bp;
|
|
|
|
KASSERT(mutex_owned(cs->sc_iolock));
|
|
|
|
bp = bufq_get(cs->sc_bufq);
|
|
KASSERT(bp != NULL);
|
|
|
|
disk_busy(&cs->sc_dkdev);
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdstart(%s, %p)\n", cs->sc_xname, bp);
|
|
#endif
|
|
|
|
/* If it's a nil transfer, wake up the top half now. */
|
|
if (bp->b_bcount == 0)
|
|
goto done;
|
|
|
|
lp = cs->sc_dkdev.dk_label;
|
|
|
|
/*
|
|
* Do bounds checking and adjust transfer. If there's an
|
|
* error, the bounds check will flag that for us. Convert
|
|
* the partition relative block number to an absolute.
|
|
*/
|
|
blkno = bp->b_blkno;
|
|
wlabel = cs->sc_flags & (CCDF_WLABEL|CCDF_LABELLING);
|
|
if (DISKPART(bp->b_dev) != RAW_PART) {
|
|
if (bounds_check_with_label(&cs->sc_dkdev, bp, wlabel) <= 0)
|
|
goto done;
|
|
blkno += lp->d_partitions[DISKPART(bp->b_dev)].p_offset;
|
|
}
|
|
mutex_exit(cs->sc_iolock);
|
|
bp->b_rawblkno = blkno;
|
|
|
|
/* Allocate the component buffers and start I/O! */
|
|
bp->b_resid = bp->b_bcount;
|
|
bn = bp->b_rawblkno;
|
|
addr = bp->b_data;
|
|
for (bcount = bp->b_bcount; bcount > 0; bcount -= rcount) {
|
|
cbp = ccdbuffer(cs, bp, bn, addr, bcount);
|
|
rcount = cbp->cb_buf.b_bcount;
|
|
bn += btodb(rcount);
|
|
addr += rcount;
|
|
vp = cbp->cb_buf.b_vp;
|
|
if ((cbp->cb_buf.b_flags & B_READ) == 0) {
|
|
mutex_enter(vp->v_interlock);
|
|
vp->v_numoutput++;
|
|
mutex_exit(vp->v_interlock);
|
|
}
|
|
(void)VOP_STRATEGY(vp, &cbp->cb_buf);
|
|
}
|
|
return;
|
|
|
|
done:
|
|
disk_unbusy(&cs->sc_dkdev, 0, 0);
|
|
cv_broadcast(&cs->sc_stop);
|
|
cv_broadcast(&cs->sc_push);
|
|
mutex_exit(cs->sc_iolock);
|
|
bp->b_resid = bp->b_bcount;
|
|
biodone(bp);
|
|
}
|
|
|
|
/*
|
|
* Build a component buffer header.
|
|
*/
|
|
static struct ccdbuf *
|
|
ccdbuffer(struct ccd_softc *cs, struct buf *bp, daddr_t bn, void *addr,
|
|
long bcount)
|
|
{
|
|
struct ccdcinfo *ci;
|
|
struct ccdbuf *cbp;
|
|
daddr_t cbn, cboff;
|
|
u_int64_t cbc;
|
|
int ccdisk;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_IO)
|
|
printf("ccdbuffer(%p, %p, %" PRId64 ", %p, %ld)\n",
|
|
cs, bp, bn, addr, bcount);
|
|
#endif
|
|
/*
|
|
* Determine which component bn falls in.
|
|
*/
|
|
cbn = bn;
|
|
cboff = 0;
|
|
|
|
/*
|
|
* Serially concatenated
|
|
*/
|
|
if (cs->sc_ileave == 0) {
|
|
daddr_t sblk;
|
|
|
|
sblk = 0;
|
|
for (ccdisk = 0, ci = &cs->sc_cinfo[ccdisk];
|
|
cbn >= sblk + ci->ci_size;
|
|
ccdisk++, ci = &cs->sc_cinfo[ccdisk])
|
|
sblk += ci->ci_size;
|
|
cbn -= sblk;
|
|
}
|
|
/*
|
|
* Interleaved
|
|
*/
|
|
else {
|
|
struct ccdiinfo *ii;
|
|
int off;
|
|
|
|
cboff = cbn % cs->sc_ileave;
|
|
cbn /= cs->sc_ileave;
|
|
for (ii = cs->sc_itable; ii->ii_ndisk; ii++)
|
|
if (ii->ii_startblk > cbn)
|
|
break;
|
|
ii--;
|
|
off = cbn - ii->ii_startblk;
|
|
if (ii->ii_ndisk == 1) {
|
|
ccdisk = ii->ii_index[0];
|
|
cbn = ii->ii_startoff + off;
|
|
} else {
|
|
ccdisk = ii->ii_index[off % ii->ii_ndisk];
|
|
cbn = ii->ii_startoff + off / ii->ii_ndisk;
|
|
}
|
|
cbn *= cs->sc_ileave;
|
|
ci = &cs->sc_cinfo[ccdisk];
|
|
}
|
|
|
|
/*
|
|
* Fill in the component buf structure.
|
|
*/
|
|
cbp = CCD_GETBUF();
|
|
KASSERT(cbp != NULL);
|
|
buf_init(&cbp->cb_buf);
|
|
cbp->cb_buf.b_flags = bp->b_flags;
|
|
cbp->cb_buf.b_oflags = bp->b_oflags;
|
|
cbp->cb_buf.b_cflags = bp->b_cflags;
|
|
cbp->cb_buf.b_iodone = ccdiodone;
|
|
cbp->cb_buf.b_proc = bp->b_proc;
|
|
cbp->cb_buf.b_dev = ci->ci_dev;
|
|
cbp->cb_buf.b_blkno = cbn + cboff;
|
|
cbp->cb_buf.b_data = addr;
|
|
cbp->cb_buf.b_vp = ci->ci_vp;
|
|
cbp->cb_buf.b_objlock = ci->ci_vp->v_interlock;
|
|
if (cs->sc_ileave == 0)
|
|
cbc = dbtob((u_int64_t)(ci->ci_size - cbn));
|
|
else
|
|
cbc = dbtob((u_int64_t)(cs->sc_ileave - cboff));
|
|
cbp->cb_buf.b_bcount = cbc < bcount ? cbc : bcount;
|
|
|
|
/*
|
|
* context for ccdiodone
|
|
*/
|
|
cbp->cb_obp = bp;
|
|
cbp->cb_sc = cs;
|
|
cbp->cb_comp = ccdisk;
|
|
|
|
BIO_COPYPRIO(&cbp->cb_buf, bp);
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_IO)
|
|
printf(" dev 0x%"PRIx64"(u%lu): cbp %p bn %" PRId64 " addr %p"
|
|
" bcnt %d\n",
|
|
ci->ci_dev, (unsigned long) (ci-cs->sc_cinfo), cbp,
|
|
cbp->cb_buf.b_blkno, cbp->cb_buf.b_data,
|
|
cbp->cb_buf.b_bcount);
|
|
#endif
|
|
|
|
return (cbp);
|
|
}
|
|
|
|
/*
|
|
* Called at interrupt time.
|
|
* Mark the component as done and if all components are done,
|
|
* take a ccd interrupt.
|
|
*/
|
|
static void
|
|
ccdiodone(struct buf *vbp)
|
|
{
|
|
struct ccdbuf *cbp = (struct ccdbuf *) vbp;
|
|
struct buf *bp = cbp->cb_obp;
|
|
struct ccd_softc *cs = cbp->cb_sc;
|
|
int count;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdiodone(%p)\n", cbp);
|
|
if (ccddebug & CCDB_IO) {
|
|
printf("ccdiodone: bp %p bcount %d resid %d\n",
|
|
bp, bp->b_bcount, bp->b_resid);
|
|
printf(" dev 0x%"PRIx64"(u%d), cbp %p bn %" PRId64 " addr %p"
|
|
" bcnt %d\n",
|
|
cbp->cb_buf.b_dev, cbp->cb_comp, cbp,
|
|
cbp->cb_buf.b_blkno, cbp->cb_buf.b_data,
|
|
cbp->cb_buf.b_bcount);
|
|
}
|
|
#endif
|
|
|
|
if (cbp->cb_buf.b_error != 0) {
|
|
bp->b_error = cbp->cb_buf.b_error;
|
|
printf("%s: error %d on component %d\n",
|
|
cs->sc_xname, bp->b_error, cbp->cb_comp);
|
|
}
|
|
count = cbp->cb_buf.b_bcount;
|
|
buf_destroy(&cbp->cb_buf);
|
|
CCD_PUTBUF(cbp);
|
|
|
|
/*
|
|
* If all done, "interrupt".
|
|
*/
|
|
mutex_enter(cs->sc_iolock);
|
|
bp->b_resid -= count;
|
|
if (bp->b_resid < 0)
|
|
panic("ccdiodone: count");
|
|
if (bp->b_resid == 0) {
|
|
/*
|
|
* Request is done for better or worse, wakeup the top half.
|
|
*/
|
|
if (bp->b_error != 0)
|
|
bp->b_resid = bp->b_bcount;
|
|
disk_unbusy(&cs->sc_dkdev, (bp->b_bcount - bp->b_resid),
|
|
(bp->b_flags & B_READ));
|
|
if (!disk_isbusy(&cs->sc_dkdev)) {
|
|
if (bufq_peek(cs->sc_bufq) != NULL) {
|
|
cv_broadcast(&cs->sc_push);
|
|
}
|
|
cv_broadcast(&cs->sc_stop);
|
|
}
|
|
mutex_exit(cs->sc_iolock);
|
|
biodone(bp);
|
|
} else
|
|
mutex_exit(cs->sc_iolock);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
ccdread(dev_t dev, struct uio *uio, int flags)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
struct ccd_softc *cs;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdread(0x%"PRIx64", %p)\n", dev, uio);
|
|
#endif
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return 0;
|
|
|
|
/* Unlocked advisory check, ccdstrategy check is synchronous. */
|
|
if ((cs->sc_flags & CCDF_INITED) == 0)
|
|
return (ENXIO);
|
|
|
|
return (physio(ccdstrategy, NULL, dev, B_READ, minphys, uio));
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
ccdwrite(dev_t dev, struct uio *uio, int flags)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
struct ccd_softc *cs;
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_FOLLOW)
|
|
printf("ccdwrite(0x%"PRIx64", %p)\n", dev, uio);
|
|
#endif
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return ENOENT;
|
|
|
|
/* Unlocked advisory check, ccdstrategy check is synchronous. */
|
|
if ((cs->sc_flags & CCDF_INITED) == 0)
|
|
return (ENXIO);
|
|
|
|
return (physio(ccdstrategy, NULL, dev, B_WRITE, minphys, uio));
|
|
}
|
|
|
|
static int
|
|
ccdioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
int i, j, lookedup = 0, error = 0;
|
|
int part, pmask, make;
|
|
struct ccd_softc *cs;
|
|
struct ccd_ioctl *ccio = (struct ccd_ioctl *)data;
|
|
kauth_cred_t uc;
|
|
char **cpp;
|
|
struct pathbuf *pb;
|
|
struct vnode **vpp;
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
struct disklabel newlabel;
|
|
#endif
|
|
|
|
switch (cmd) {
|
|
#if defined(COMPAT_60) && !defined(_LP64)
|
|
case CCDIOCSET_60:
|
|
#endif
|
|
case CCDIOCSET:
|
|
make = 1;
|
|
break;
|
|
default:
|
|
make = 0;
|
|
break;
|
|
}
|
|
|
|
if ((cs = ccdget(unit, make)) == NULL)
|
|
return ENOENT;
|
|
uc = kauth_cred_get();
|
|
|
|
/*
|
|
* Compat code must not be called if on a platform where
|
|
* sizeof (size_t) == sizeof (uint64_t) as CCDIOCSET will
|
|
* be the same as CCDIOCSET_60
|
|
*/
|
|
#if defined(COMPAT_60) && !defined(_LP64)
|
|
switch (cmd) {
|
|
case CCDIOCSET_60: {
|
|
struct ccd_ioctl ccionew;
|
|
struct ccd_ioctl_60 *ccio60 =
|
|
(struct ccd_ioctl_60 *)data;
|
|
ccionew.ccio_disks = ccio->ccio_disks;
|
|
ccionew.ccio_ndisks = ccio->ccio_ndisks;
|
|
ccionew.ccio_ileave = ccio->ccio_ileave;
|
|
ccionew.ccio_flags = ccio->ccio_flags;
|
|
ccionew.ccio_unit = ccio->ccio_unit;
|
|
error = ccdioctl(dev, CCDIOCSET, &ccionew, flag, l);
|
|
if (!error) {
|
|
/* Copy data back, adjust types if necessary */
|
|
ccio60->ccio_disks = ccionew.ccio_disks;
|
|
ccio60->ccio_ndisks = ccionew.ccio_ndisks;
|
|
ccio60->ccio_ileave = ccionew.ccio_ileave;
|
|
ccio60->ccio_flags = ccionew.ccio_flags;
|
|
ccio60->ccio_unit = ccionew.ccio_unit;
|
|
ccio60->ccio_size = (size_t)ccionew.ccio_size;
|
|
}
|
|
return error;
|
|
}
|
|
break;
|
|
|
|
case CCDIOCCLR_60:
|
|
/*
|
|
* ccio_size member not used, so existing struct OK
|
|
* drop through to existing non-compat version
|
|
*/
|
|
cmd = CCDIOCCLR;
|
|
break;
|
|
}
|
|
#endif /* COMPAT_60 && !_LP64*/
|
|
|
|
/* Must be open for writes for these commands... */
|
|
switch (cmd) {
|
|
case CCDIOCSET:
|
|
case CCDIOCCLR:
|
|
case DIOCSDINFO:
|
|
case DIOCWDINFO:
|
|
case DIOCCACHESYNC:
|
|
case DIOCAWEDGE:
|
|
case DIOCDWEDGE:
|
|
case DIOCMWEDGES:
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
case ODIOCSDINFO:
|
|
case ODIOCWDINFO:
|
|
#endif
|
|
case DIOCKLABEL:
|
|
case DIOCWLABEL:
|
|
if ((flag & FWRITE) == 0)
|
|
return (EBADF);
|
|
}
|
|
|
|
mutex_enter(&cs->sc_dvlock);
|
|
|
|
/* Must be initialized for these... */
|
|
switch (cmd) {
|
|
case CCDIOCCLR:
|
|
case DIOCGDINFO:
|
|
case DIOCGSTRATEGY:
|
|
case DIOCGCACHE:
|
|
case DIOCCACHESYNC:
|
|
case DIOCAWEDGE:
|
|
case DIOCDWEDGE:
|
|
case DIOCLWEDGES:
|
|
case DIOCMWEDGES:
|
|
case DIOCSDINFO:
|
|
case DIOCWDINFO:
|
|
case DIOCGPARTINFO:
|
|
case DIOCWLABEL:
|
|
case DIOCKLABEL:
|
|
case DIOCGDEFLABEL:
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
case ODIOCGDINFO:
|
|
case ODIOCSDINFO:
|
|
case ODIOCWDINFO:
|
|
case ODIOCGDEFLABEL:
|
|
#endif
|
|
if ((cs->sc_flags & CCDF_INITED) == 0) {
|
|
error = ENXIO;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
error = disk_ioctl(&cs->sc_dkdev, dev, cmd, data, flag, l);
|
|
if (error != EPASSTHROUGH)
|
|
goto out;
|
|
|
|
error = 0;
|
|
switch (cmd) {
|
|
case CCDIOCSET:
|
|
if (cs->sc_flags & CCDF_INITED) {
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Validate the flags. */
|
|
if ((ccio->ccio_flags & CCDF_USERMASK) != ccio->ccio_flags) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (ccio->ccio_ndisks > CCD_MAXNDISKS ||
|
|
ccio->ccio_ndisks == 0) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Fill in some important bits. */
|
|
cs->sc_ileave = ccio->ccio_ileave;
|
|
cs->sc_nccdisks = ccio->ccio_ndisks;
|
|
cs->sc_flags = ccio->ccio_flags & CCDF_USERMASK;
|
|
|
|
/*
|
|
* Allocate space for and copy in the array of
|
|
* component pathnames and device numbers.
|
|
*/
|
|
cpp = kmem_alloc(ccio->ccio_ndisks * sizeof(*cpp), KM_SLEEP);
|
|
vpp = kmem_alloc(ccio->ccio_ndisks * sizeof(*vpp), KM_SLEEP);
|
|
error = copyin(ccio->ccio_disks, cpp,
|
|
ccio->ccio_ndisks * sizeof(*cpp));
|
|
if (error) {
|
|
kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp));
|
|
kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp));
|
|
goto out;
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_INIT)
|
|
for (i = 0; i < ccio->ccio_ndisks; ++i)
|
|
printf("ccdioctl: component %d: %p\n",
|
|
i, cpp[i]);
|
|
#endif
|
|
|
|
for (i = 0; i < ccio->ccio_ndisks; ++i) {
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_INIT)
|
|
printf("ccdioctl: lookedup = %d\n", lookedup);
|
|
#endif
|
|
error = pathbuf_copyin(cpp[i], &pb);
|
|
if (error == 0) {
|
|
error = dk_lookup(pb, l, &vpp[i]);
|
|
}
|
|
pathbuf_destroy(pb);
|
|
if (error != 0) {
|
|
for (j = 0; j < lookedup; ++j)
|
|
(void)vn_close(vpp[j], FREAD|FWRITE,
|
|
uc);
|
|
kmem_free(vpp, ccio->ccio_ndisks *
|
|
sizeof(*vpp));
|
|
kmem_free(cpp, ccio->ccio_ndisks *
|
|
sizeof(*cpp));
|
|
goto out;
|
|
}
|
|
++lookedup;
|
|
}
|
|
|
|
/* Attach the disk. */
|
|
disk_attach(&cs->sc_dkdev);
|
|
bufq_alloc(&cs->sc_bufq, "fcfs", 0);
|
|
|
|
/*
|
|
* Initialize the ccd. Fills in the softc for us.
|
|
*/
|
|
if ((error = ccdinit(cs, cpp, vpp, l)) != 0) {
|
|
for (j = 0; j < lookedup; ++j)
|
|
(void)vn_close(vpp[j], FREAD|FWRITE,
|
|
uc);
|
|
kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp));
|
|
kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp));
|
|
disk_detach(&cs->sc_dkdev);
|
|
mutex_exit(&cs->sc_dvlock);
|
|
bufq_free(cs->sc_bufq);
|
|
return error;
|
|
}
|
|
|
|
/* We can free the temporary variables now. */
|
|
kmem_free(vpp, ccio->ccio_ndisks * sizeof(*vpp));
|
|
kmem_free(cpp, ccio->ccio_ndisks * sizeof(*cpp));
|
|
|
|
/*
|
|
* The ccd has been successfully initialized, so
|
|
* we can place it into the array. Don't try to
|
|
* read the disklabel until the disk has been attached,
|
|
* because space for the disklabel is allocated
|
|
* in disk_attach();
|
|
*/
|
|
ccio->ccio_unit = unit;
|
|
ccio->ccio_size = cs->sc_size;
|
|
|
|
/* Try and read the disklabel. */
|
|
ccdgetdisklabel(dev);
|
|
disk_set_info(NULL, &cs->sc_dkdev, NULL);
|
|
|
|
/* discover wedges */
|
|
mutex_exit(&cs->sc_dvlock);
|
|
dkwedge_discover(&cs->sc_dkdev);
|
|
return 0;
|
|
|
|
case CCDIOCCLR:
|
|
/*
|
|
* Don't unconfigure if any other partitions are open
|
|
* or if both the character and block flavors of this
|
|
* partition are open.
|
|
*/
|
|
part = DISKPART(dev);
|
|
pmask = (1 << part);
|
|
if ((cs->sc_dkdev.dk_openmask & ~pmask) ||
|
|
((cs->sc_dkdev.dk_bopenmask & pmask) &&
|
|
(cs->sc_dkdev.dk_copenmask & pmask))) {
|
|
error = EBUSY;
|
|
goto out;
|
|
}
|
|
|
|
/* Delete all of our wedges. */
|
|
dkwedge_delall(&cs->sc_dkdev);
|
|
|
|
/* Stop new I/O, wait for in-flight I/O to complete. */
|
|
mutex_enter(cs->sc_iolock);
|
|
cs->sc_flags &= ~(CCDF_INITED|CCDF_VLABEL);
|
|
cs->sc_zap = true;
|
|
while (disk_isbusy(&cs->sc_dkdev) ||
|
|
bufq_peek(cs->sc_bufq) != NULL ||
|
|
cs->sc_thread != NULL) {
|
|
cv_broadcast(&cs->sc_push);
|
|
(void)cv_timedwait(&cs->sc_stop, cs->sc_iolock, hz);
|
|
}
|
|
mutex_exit(cs->sc_iolock);
|
|
|
|
/*
|
|
* Free ccd_softc information and clear entry.
|
|
*/
|
|
|
|
/* Close the components and free their pathnames. */
|
|
for (i = 0; i < cs->sc_nccdisks; ++i) {
|
|
/*
|
|
* XXX: this close could potentially fail and
|
|
* cause Bad Things. Maybe we need to force
|
|
* the close to happen?
|
|
*/
|
|
#ifdef DEBUG
|
|
if (ccddebug & CCDB_VNODE)
|
|
vprint("CCDIOCCLR: vnode info",
|
|
cs->sc_cinfo[i].ci_vp);
|
|
#endif
|
|
(void)vn_close(cs->sc_cinfo[i].ci_vp, FREAD|FWRITE,
|
|
uc);
|
|
kmem_free(cs->sc_cinfo[i].ci_path,
|
|
cs->sc_cinfo[i].ci_pathlen);
|
|
}
|
|
|
|
/* Free interleave index. */
|
|
for (i = 0; cs->sc_itable[i].ii_ndisk; ++i) {
|
|
kmem_free(cs->sc_itable[i].ii_index,
|
|
cs->sc_itable[i].ii_indexsz);
|
|
}
|
|
|
|
/* Free component info and interleave table. */
|
|
kmem_free(cs->sc_cinfo, cs->sc_nccdisks *
|
|
sizeof(struct ccdcinfo));
|
|
kmem_free(cs->sc_itable, (cs->sc_nccdisks + 1) *
|
|
sizeof(struct ccdiinfo));
|
|
|
|
aprint_normal("%s: detached\n", cs->sc_xname);
|
|
|
|
/* Detach the disk. */
|
|
disk_detach(&cs->sc_dkdev);
|
|
bufq_free(cs->sc_bufq);
|
|
ccdput(cs);
|
|
/* Don't break, otherwise cs is read again. */
|
|
return 0;
|
|
|
|
case DIOCGSTRATEGY:
|
|
{
|
|
struct disk_strategy *dks = (void *)data;
|
|
|
|
mutex_enter(cs->sc_iolock);
|
|
if (cs->sc_bufq != NULL)
|
|
strlcpy(dks->dks_name,
|
|
bufq_getstrategyname(cs->sc_bufq),
|
|
sizeof(dks->dks_name));
|
|
else
|
|
error = EINVAL;
|
|
mutex_exit(cs->sc_iolock);
|
|
dks->dks_paramlen = 0;
|
|
break;
|
|
}
|
|
|
|
case DIOCGCACHE:
|
|
{
|
|
int dkcache = 0;
|
|
|
|
/*
|
|
* We pass this call down to all components and report
|
|
* intersection of the flags returned by the components.
|
|
* If any errors out, we return error. CCD components
|
|
* can not change unless the device is unconfigured, so
|
|
* device feature flags will remain static. RCE/WCE can change
|
|
* of course, if set directly on underlying device.
|
|
*/
|
|
for (error = 0, i = 0; i < cs->sc_nccdisks; i++) {
|
|
error = VOP_IOCTL(cs->sc_cinfo[i].ci_vp, cmd, &j,
|
|
flag, uc);
|
|
if (error)
|
|
break;
|
|
|
|
if (i == 0)
|
|
dkcache = j;
|
|
else
|
|
dkcache = DKCACHE_COMBINE(dkcache, j);
|
|
}
|
|
|
|
*((int *)data) = dkcache;
|
|
break;
|
|
}
|
|
|
|
case DIOCCACHESYNC:
|
|
/*
|
|
* We pass this call down to all components and report
|
|
* the first error we encounter.
|
|
*/
|
|
for (error = 0, i = 0; i < cs->sc_nccdisks; i++) {
|
|
j = VOP_IOCTL(cs->sc_cinfo[i].ci_vp, cmd, data,
|
|
flag, uc);
|
|
if (j != 0 && error == 0)
|
|
error = j;
|
|
}
|
|
break;
|
|
|
|
case DIOCWDINFO:
|
|
case DIOCSDINFO:
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
case ODIOCWDINFO:
|
|
case ODIOCSDINFO:
|
|
#endif
|
|
{
|
|
struct disklabel *lp;
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
if (cmd == ODIOCSDINFO || cmd == ODIOCWDINFO) {
|
|
memset(&newlabel, 0, sizeof newlabel);
|
|
memcpy(&newlabel, data, sizeof (struct olddisklabel));
|
|
lp = &newlabel;
|
|
} else
|
|
#endif
|
|
lp = (struct disklabel *)data;
|
|
|
|
cs->sc_flags |= CCDF_LABELLING;
|
|
|
|
error = setdisklabel(cs->sc_dkdev.dk_label,
|
|
lp, 0, cs->sc_dkdev.dk_cpulabel);
|
|
if (error == 0) {
|
|
if (cmd == DIOCWDINFO
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
|| cmd == ODIOCWDINFO
|
|
#endif
|
|
)
|
|
error = writedisklabel(CCDLABELDEV(dev),
|
|
ccdstrategy, cs->sc_dkdev.dk_label,
|
|
cs->sc_dkdev.dk_cpulabel);
|
|
}
|
|
|
|
cs->sc_flags &= ~CCDF_LABELLING;
|
|
break;
|
|
}
|
|
|
|
case DIOCKLABEL:
|
|
if (*(int *)data != 0)
|
|
cs->sc_flags |= CCDF_KLABEL;
|
|
else
|
|
cs->sc_flags &= ~CCDF_KLABEL;
|
|
break;
|
|
|
|
case DIOCWLABEL:
|
|
if (*(int *)data != 0)
|
|
cs->sc_flags |= CCDF_WLABEL;
|
|
else
|
|
cs->sc_flags &= ~CCDF_WLABEL;
|
|
break;
|
|
|
|
case DIOCGDEFLABEL:
|
|
ccdgetdefaultlabel(cs, (struct disklabel *)data);
|
|
break;
|
|
|
|
#ifdef __HAVE_OLD_DISKLABEL
|
|
case ODIOCGDEFLABEL:
|
|
ccdgetdefaultlabel(cs, &newlabel);
|
|
if (newlabel.d_npartitions > OLDMAXPARTITIONS)
|
|
return ENOTTY;
|
|
memcpy(data, &newlabel, sizeof (struct olddisklabel));
|
|
break;
|
|
#endif
|
|
|
|
default:
|
|
error = ENOTTY;
|
|
}
|
|
|
|
out:
|
|
mutex_exit(&cs->sc_dvlock);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
ccdsize(dev_t dev)
|
|
{
|
|
struct ccd_softc *cs;
|
|
struct disklabel *lp;
|
|
int part, unit, omask, size;
|
|
|
|
unit = ccdunit(dev);
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return -1;
|
|
|
|
if ((cs->sc_flags & CCDF_INITED) == 0)
|
|
return (-1);
|
|
|
|
part = DISKPART(dev);
|
|
omask = cs->sc_dkdev.dk_openmask & (1 << part);
|
|
lp = cs->sc_dkdev.dk_label;
|
|
|
|
if (omask == 0 && ccdopen(dev, 0, S_IFBLK, curlwp))
|
|
return (-1);
|
|
|
|
if (lp->d_partitions[part].p_fstype != FS_SWAP)
|
|
size = -1;
|
|
else
|
|
size = lp->d_partitions[part].p_size *
|
|
(lp->d_secsize / DEV_BSIZE);
|
|
|
|
if (omask == 0 && ccdclose(dev, 0, S_IFBLK, curlwp))
|
|
return (-1);
|
|
|
|
return (size);
|
|
}
|
|
|
|
static void
|
|
ccdgetdefaultlabel(struct ccd_softc *cs, struct disklabel *lp)
|
|
{
|
|
struct ccdgeom *ccg = &cs->sc_geom;
|
|
|
|
memset(lp, 0, sizeof(*lp));
|
|
|
|
if (cs->sc_size > UINT32_MAX)
|
|
lp->d_secperunit = UINT32_MAX;
|
|
else
|
|
lp->d_secperunit = cs->sc_size;
|
|
lp->d_secsize = ccg->ccg_secsize;
|
|
lp->d_nsectors = ccg->ccg_nsectors;
|
|
lp->d_ntracks = ccg->ccg_ntracks;
|
|
lp->d_ncylinders = ccg->ccg_ncylinders;
|
|
lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
|
|
|
|
strncpy(lp->d_typename, "ccd", sizeof(lp->d_typename));
|
|
lp->d_type = DKTYPE_CCD;
|
|
strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname));
|
|
lp->d_rpm = 3600;
|
|
lp->d_interleave = 1;
|
|
lp->d_flags = 0;
|
|
|
|
lp->d_partitions[RAW_PART].p_offset = 0;
|
|
lp->d_partitions[RAW_PART].p_size = lp->d_secperunit;
|
|
lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
|
|
lp->d_npartitions = RAW_PART + 1;
|
|
|
|
lp->d_magic = DISKMAGIC;
|
|
lp->d_magic2 = DISKMAGIC;
|
|
lp->d_checksum = dkcksum(cs->sc_dkdev.dk_label);
|
|
}
|
|
|
|
/*
|
|
* Read the disklabel from the ccd. If one is not present, fake one
|
|
* up.
|
|
*/
|
|
static void
|
|
ccdgetdisklabel(dev_t dev)
|
|
{
|
|
int unit = ccdunit(dev);
|
|
struct ccd_softc *cs;
|
|
const char *errstring;
|
|
struct disklabel *lp;
|
|
struct cpu_disklabel *clp;
|
|
|
|
if ((cs = ccdget(unit, 0)) == NULL)
|
|
return;
|
|
lp = cs->sc_dkdev.dk_label;
|
|
clp = cs->sc_dkdev.dk_cpulabel;
|
|
KASSERT(mutex_owned(&cs->sc_dvlock));
|
|
|
|
memset(clp, 0, sizeof(*clp));
|
|
|
|
ccdgetdefaultlabel(cs, lp);
|
|
|
|
/*
|
|
* Call the generic disklabel extraction routine.
|
|
*/
|
|
cs->sc_flags |= CCDF_RLABEL;
|
|
if ((cs->sc_flags & CCDF_NOLABEL) != 0)
|
|
errstring = "CCDF_NOLABEL set; ignoring on-disk label";
|
|
else
|
|
errstring = readdisklabel(CCDLABELDEV(dev), ccdstrategy,
|
|
cs->sc_dkdev.dk_label, cs->sc_dkdev.dk_cpulabel);
|
|
if (errstring)
|
|
ccdmakedisklabel(cs);
|
|
else {
|
|
int i;
|
|
struct partition *pp;
|
|
|
|
/*
|
|
* Sanity check whether the found disklabel is valid.
|
|
*
|
|
* This is necessary since total size of ccd may vary
|
|
* when an interleave is changed even though exactly
|
|
* same componets are used, and old disklabel may used
|
|
* if that is found.
|
|
*/
|
|
if (lp->d_secperunit < UINT32_MAX ?
|
|
lp->d_secperunit != cs->sc_size :
|
|
lp->d_secperunit > cs->sc_size)
|
|
printf("WARNING: %s: "
|
|
"total sector size in disklabel (%ju) != "
|
|
"the size of ccd (%ju)\n", cs->sc_xname,
|
|
(uintmax_t)lp->d_secperunit,
|
|
(uintmax_t)cs->sc_size);
|
|
for (i = 0; i < lp->d_npartitions; i++) {
|
|
pp = &lp->d_partitions[i];
|
|
if (pp->p_offset + pp->p_size > cs->sc_size)
|
|
printf("WARNING: %s: end of partition `%c' "
|
|
"exceeds the size of ccd (%ju)\n",
|
|
cs->sc_xname, 'a' + i, (uintmax_t)cs->sc_size);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
/* It's actually extremely common to have unlabeled ccds. */
|
|
if (ccddebug & CCDB_LABEL)
|
|
if (errstring != NULL)
|
|
printf("%s: %s\n", cs->sc_xname, errstring);
|
|
#endif
|
|
|
|
/* In-core label now valid. */
|
|
cs->sc_flags = (cs->sc_flags | CCDF_VLABEL) & ~CCDF_RLABEL;
|
|
}
|
|
|
|
/*
|
|
* Take care of things one might want to take care of in the event
|
|
* that a disklabel isn't present.
|
|
*/
|
|
static void
|
|
ccdmakedisklabel(struct ccd_softc *cs)
|
|
{
|
|
struct disklabel *lp = cs->sc_dkdev.dk_label;
|
|
|
|
/*
|
|
* For historical reasons, if there's no disklabel present
|
|
* the raw partition must be marked FS_BSDFFS.
|
|
*/
|
|
lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS;
|
|
|
|
strncpy(lp->d_packname, "default label", sizeof(lp->d_packname));
|
|
|
|
lp->d_checksum = dkcksum(lp);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
printiinfo(struct ccdiinfo *ii)
|
|
{
|
|
int ix, i;
|
|
|
|
for (ix = 0; ii->ii_ndisk; ix++, ii++) {
|
|
printf(" itab[%d]: #dk %d sblk %" PRId64 " soff %" PRId64,
|
|
ix, ii->ii_ndisk, ii->ii_startblk, ii->ii_startoff);
|
|
for (i = 0; i < ii->ii_ndisk; i++)
|
|
printf(" %d", ii->ii_index[i]);
|
|
printf("\n");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
MODULE(MODULE_CLASS_DRIVER, ccd, "dk_subr");
|
|
|
|
static int
|
|
ccd_modcmd(modcmd_t cmd, void *arg)
|
|
{
|
|
int error = 0;
|
|
#ifdef _MODULE
|
|
int bmajor = -1, cmajor = -1;
|
|
#endif
|
|
|
|
|
|
switch (cmd) {
|
|
case MODULE_CMD_INIT:
|
|
#ifdef _MODULE
|
|
ccdattach(0);
|
|
|
|
error = devsw_attach("ccd", &ccd_bdevsw, &bmajor,
|
|
&ccd_cdevsw, &cmajor);
|
|
sysctl_kern_ccd_setup(&ccd_clog);
|
|
#endif
|
|
break;
|
|
|
|
case MODULE_CMD_FINI:
|
|
#ifdef _MODULE
|
|
mutex_enter(&ccd_lock);
|
|
if (ccd_nactive) {
|
|
mutex_exit(&ccd_lock);
|
|
error = EBUSY;
|
|
} else {
|
|
mutex_exit(&ccd_lock);
|
|
error = devsw_detach(&ccd_bdevsw, &ccd_cdevsw);
|
|
ccddetach();
|
|
}
|
|
sysctl_teardown(&ccd_clog);
|
|
#endif
|
|
break;
|
|
|
|
case MODULE_CMD_STAT:
|
|
return ENOTTY;
|
|
|
|
default:
|
|
return ENOTTY;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
ccd_units_sysctl(SYSCTLFN_ARGS)
|
|
{
|
|
struct sysctlnode node;
|
|
struct ccd_softc *sc;
|
|
int error, i, nccd, *units;
|
|
size_t size;
|
|
|
|
nccd = 0;
|
|
mutex_enter(&ccd_lock);
|
|
LIST_FOREACH(sc, &ccds, sc_link)
|
|
nccd++;
|
|
mutex_exit(&ccd_lock);
|
|
|
|
if (nccd != 0) {
|
|
size = nccd * sizeof(*units);
|
|
units = kmem_zalloc(size, KM_SLEEP);
|
|
i = 0;
|
|
mutex_enter(&ccd_lock);
|
|
LIST_FOREACH(sc, &ccds, sc_link) {
|
|
if (i >= nccd)
|
|
break;
|
|
units[i] = sc->sc_unit;
|
|
}
|
|
mutex_exit(&ccd_lock);
|
|
} else {
|
|
units = NULL;
|
|
size = 0;
|
|
}
|
|
|
|
node = *rnode;
|
|
node.sysctl_data = units;
|
|
node.sysctl_size = size;
|
|
|
|
error = sysctl_lookup(SYSCTLFN_CALL(&node));
|
|
if (units)
|
|
kmem_free(units, size);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
ccd_info_sysctl(SYSCTLFN_ARGS)
|
|
{
|
|
struct sysctlnode node;
|
|
struct ccddiskinfo ccd;
|
|
struct ccd_softc *sc;
|
|
int unit;
|
|
|
|
if (newp == NULL || newlen != sizeof(int))
|
|
return EINVAL;
|
|
|
|
unit = *(const int *)newp;
|
|
newp = NULL;
|
|
newlen = 0;
|
|
ccd.ccd_ndisks = ~0;
|
|
mutex_enter(&ccd_lock);
|
|
LIST_FOREACH(sc, &ccds, sc_link) {
|
|
if (sc->sc_unit == unit) {
|
|
ccd.ccd_ileave = sc->sc_ileave;
|
|
ccd.ccd_size = sc->sc_size;
|
|
ccd.ccd_ndisks = sc->sc_nccdisks;
|
|
ccd.ccd_flags = sc->sc_flags;
|
|
break;
|
|
}
|
|
}
|
|
mutex_exit(&ccd_lock);
|
|
|
|
if (ccd.ccd_ndisks == ~0)
|
|
return ENOENT;
|
|
|
|
node = *rnode;
|
|
node.sysctl_data = &ccd;
|
|
node.sysctl_size = sizeof(ccd);
|
|
|
|
return sysctl_lookup(SYSCTLFN_CALL(&node));
|
|
}
|
|
|
|
static int
|
|
ccd_components_sysctl(SYSCTLFN_ARGS)
|
|
{
|
|
struct sysctlnode node;
|
|
int error, unit;
|
|
size_t size;
|
|
char *names, *p, *ep;
|
|
struct ccd_softc *sc;
|
|
|
|
if (newp == NULL || newlen != sizeof(int))
|
|
return EINVAL;
|
|
|
|
size = 0;
|
|
unit = *(const int *)newp;
|
|
newp = NULL;
|
|
newlen = 0;
|
|
mutex_enter(&ccd_lock);
|
|
LIST_FOREACH(sc, &ccds, sc_link)
|
|
if (sc->sc_unit == unit) {
|
|
for (size_t i = 0; i < sc->sc_nccdisks; i++)
|
|
size += strlen(sc->sc_cinfo[i].ci_path) + 1;
|
|
break;
|
|
}
|
|
mutex_exit(&ccd_lock);
|
|
|
|
if (size == 0)
|
|
return ENOENT;
|
|
names = kmem_zalloc(size, KM_SLEEP);
|
|
p = names;
|
|
ep = names + size;
|
|
mutex_enter(&ccd_lock);
|
|
LIST_FOREACH(sc, &ccds, sc_link)
|
|
if (sc->sc_unit == unit) {
|
|
for (size_t i = 0; i < sc->sc_nccdisks; i++) {
|
|
char *d = sc->sc_cinfo[i].ci_path;
|
|
while (p < ep && (*p++ = *d++) != '\0')
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
mutex_exit(&ccd_lock);
|
|
|
|
node = *rnode;
|
|
node.sysctl_data = names;
|
|
node.sysctl_size = ep - names;
|
|
|
|
error = sysctl_lookup(SYSCTLFN_CALL(&node));
|
|
kmem_free(names, size);
|
|
return error;
|
|
}
|
|
|
|
SYSCTL_SETUP(sysctl_kern_ccd_setup, "sysctl kern.ccd subtree setup")
|
|
{
|
|
const struct sysctlnode *node = NULL;
|
|
|
|
sysctl_createv(clog, 0, NULL, &node,
|
|
CTLFLAG_PERMANENT,
|
|
CTLTYPE_NODE, "ccd",
|
|
SYSCTL_DESCR("ConCatenated Disk state"),
|
|
NULL, 0, NULL, 0,
|
|
CTL_KERN, CTL_CREATE, CTL_EOL);
|
|
|
|
if (node == NULL)
|
|
return;
|
|
|
|
sysctl_createv(clog, 0, &node, NULL,
|
|
CTLFLAG_PERMANENT | CTLFLAG_READONLY,
|
|
CTLTYPE_STRUCT, "units",
|
|
SYSCTL_DESCR("List of ccd unit numbers"),
|
|
ccd_units_sysctl, 0, NULL, 0,
|
|
CTL_CREATE, CTL_EOL);
|
|
sysctl_createv(clog, 0, &node, NULL,
|
|
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
|
|
CTLTYPE_STRUCT, "info",
|
|
SYSCTL_DESCR("Information about a CCD unit"),
|
|
ccd_info_sysctl, 0, NULL, 0,
|
|
CTL_CREATE, CTL_EOL);
|
|
sysctl_createv(clog, 0, &node, NULL,
|
|
CTLFLAG_PERMANENT | CTLFLAG_READWRITE,
|
|
CTLTYPE_STRUCT, "components",
|
|
SYSCTL_DESCR("Information about CCD components"),
|
|
ccd_components_sysctl, 0, NULL, 0,
|
|
CTL_CREATE, CTL_EOL);
|
|
}
|