954 lines
22 KiB
C
954 lines
22 KiB
C
/* $NetBSD: kern_subr.c,v 1.36 1998/02/18 07:11:46 thorpej Exp $ */
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/*-
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* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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) 1982, 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)kern_subr.c 8.3 (Berkeley) 1/21/94
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*/
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#include "opt_uvm.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/device.h>
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#include <sys/reboot.h>
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#include <sys/conf.h>
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#include <sys/disklabel.h>
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#include <sys/queue.h>
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#include <dev/cons.h>
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#include <net/if.h>
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/* XXX these should eventually move to subr_autoconf.c */
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static int findblkmajor __P((const char *, struct devnametobdevmaj *));
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static const char *findblkname __P((int, struct devnametobdevmaj *));
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static struct device *getdisk __P((char *, int, int,
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struct devnametobdevmaj *, dev_t *, int));
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static struct device *parsedisk __P((char *, int, int,
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struct devnametobdevmaj *, dev_t *));
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static int getstr __P((char *, int));
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int
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uiomove(buf, n, uio)
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register void *buf;
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register int n;
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register struct uio *uio;
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{
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register struct iovec *iov;
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u_int cnt;
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int error = 0;
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char *cp = buf;
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#ifdef DIAGNOSTIC
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if (uio->uio_rw != UIO_READ && uio->uio_rw != UIO_WRITE)
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panic("uiomove: mode");
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if (uio->uio_segflg == UIO_USERSPACE && uio->uio_procp != curproc)
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panic("uiomove proc");
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#endif
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while (n > 0 && uio->uio_resid) {
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iov = uio->uio_iov;
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cnt = iov->iov_len;
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if (cnt == 0) {
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uio->uio_iov++;
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uio->uio_iovcnt--;
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continue;
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}
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if (cnt > n)
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cnt = n;
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switch (uio->uio_segflg) {
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case UIO_USERSPACE:
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if (uio->uio_rw == UIO_READ)
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error = copyout(cp, iov->iov_base, cnt);
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else
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error = copyin(iov->iov_base, cp, cnt);
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if (error)
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return (error);
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break;
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case UIO_SYSSPACE:
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#if defined(UVM)
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if (uio->uio_rw == UIO_READ)
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error = kcopy(cp, iov->iov_base, cnt);
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else
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error = kcopy(iov->iov_base, cp, cnt);
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if (error)
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return(error);
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#else
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if (uio->uio_rw == UIO_READ)
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bcopy(cp, iov->iov_base, cnt);
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else
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bcopy(iov->iov_base, cp, cnt);
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#endif
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break;
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}
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iov->iov_base += cnt;
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iov->iov_len -= cnt;
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uio->uio_resid -= cnt;
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uio->uio_offset += cnt;
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cp += cnt;
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n -= cnt;
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}
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return (error);
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}
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/*
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* Give next character to user as result of read.
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*/
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int
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ureadc(c, uio)
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register int c;
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register struct uio *uio;
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{
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register struct iovec *iov;
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if (uio->uio_resid <= 0)
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panic("ureadc: non-positive resid");
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again:
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if (uio->uio_iovcnt <= 0)
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panic("ureadc: non-positive iovcnt");
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iov = uio->uio_iov;
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if (iov->iov_len <= 0) {
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uio->uio_iovcnt--;
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uio->uio_iov++;
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goto again;
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}
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switch (uio->uio_segflg) {
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case UIO_USERSPACE:
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if (subyte(iov->iov_base, c) < 0)
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return (EFAULT);
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break;
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case UIO_SYSSPACE:
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*iov->iov_base = c;
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break;
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}
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iov->iov_base++;
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iov->iov_len--;
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uio->uio_resid--;
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uio->uio_offset++;
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return (0);
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}
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/*
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* General routine to allocate a hash table.
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*/
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void *
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hashinit(elements, type, flags, hashmask)
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int elements, type, flags;
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u_long *hashmask;
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{
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long hashsize;
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LIST_HEAD(generic, generic) *hashtbl;
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int i;
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if (elements <= 0)
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panic("hashinit: bad cnt");
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for (hashsize = 1; hashsize <= elements; hashsize <<= 1)
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continue;
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hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, flags);
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for (i = 0; i < hashsize; i++)
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LIST_INIT(&hashtbl[i]);
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*hashmask = hashsize - 1;
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return (hashtbl);
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}
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/*
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* "Shutdown hook" types, functions, and variables.
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*/
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struct shutdownhook_desc {
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LIST_ENTRY(shutdownhook_desc) sfd_list;
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void (*sfd_fn) __P((void *));
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void *sfd_arg;
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};
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LIST_HEAD(, shutdownhook_desc) shutdownhook_list;
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void *
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shutdownhook_establish(fn, arg)
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void (*fn) __P((void *));
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void *arg;
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{
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struct shutdownhook_desc *ndp;
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ndp = (struct shutdownhook_desc *)
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malloc(sizeof (*ndp), M_DEVBUF, M_NOWAIT);
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if (ndp == NULL)
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return NULL;
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ndp->sfd_fn = fn;
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ndp->sfd_arg = arg;
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LIST_INSERT_HEAD(&shutdownhook_list, ndp, sfd_list);
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return (ndp);
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}
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void
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shutdownhook_disestablish(vhook)
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void *vhook;
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{
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#ifdef DIAGNOSTIC
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struct shutdownhook_desc *dp;
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for (dp = shutdownhook_list.lh_first; dp != NULL;
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dp = dp->sfd_list.le_next)
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if (dp == vhook)
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break;
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if (dp == NULL)
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panic("shutdownhook_disestablish: hook not established");
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#endif
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LIST_REMOVE((struct shutdownhook_desc *)vhook, sfd_list);
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free(vhook, M_DEVBUF);
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}
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/*
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* Run shutdown hooks. Should be invoked immediately before the
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* system is halted or rebooted, i.e. after file systems unmounted,
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* after crash dump done, etc.
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*
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* Each shutdown hook is removed from the list before it's run, so that
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* it won't be run again.
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*/
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void
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doshutdownhooks()
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{
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struct shutdownhook_desc *dp;
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while ((dp = shutdownhook_list.lh_first) != NULL) {
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LIST_REMOVE(dp, sfd_list);
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(*dp->sfd_fn)(dp->sfd_arg);
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#if 0
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/*
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* Don't bother freeing the hook structure,, since we may
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* be rebooting because of a memory corruption problem,
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* and this might only make things worse. It doesn't
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* matter, anyway, since the system is just about to
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* reboot.
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*/
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free(dp, M_DEVBUF);
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#endif
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}
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}
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/*
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* "Mountroot hook" types, functions, and variables.
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*/
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struct mountroothook_desc {
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LIST_ENTRY(mountroothook_desc) mrd_list;
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struct device *mrd_device;
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void (*mrd_func) __P((struct device *));
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};
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LIST_HEAD(, mountroothook_desc) mountroothook_list;
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void *
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mountroothook_establish(func, dev)
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void (*func) __P((struct device *));
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struct device *dev;
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{
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struct mountroothook_desc *mrd;
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mrd = (struct mountroothook_desc *)
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malloc(sizeof(*mrd), M_DEVBUF, M_NOWAIT);
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if (mrd == NULL)
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return (NULL);
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mrd->mrd_device = dev;
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mrd->mrd_func = func;
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LIST_INSERT_HEAD(&mountroothook_list, mrd, mrd_list);
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return (mrd);
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}
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void
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mountroothook_disestablish(vhook)
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void *vhook;
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{
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#ifdef DIAGNOSTIC
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struct mountroothook_desc *mrd;
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for (mrd = mountroothook_list.lh_first; mrd != NULL;
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mrd = mrd->mrd_list.le_next)
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if (mrd == vhook)
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break;
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if (mrd == NULL)
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panic("mountroothook_disestablish: hook not established");
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#endif
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LIST_REMOVE((struct mountroothook_desc *)vhook, mrd_list);
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free(vhook, M_DEVBUF);
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}
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void
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mountroothook_destroy()
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{
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struct mountroothook_desc *mrd;
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while ((mrd = mountroothook_list.lh_first) != NULL) {
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LIST_REMOVE(mrd, mrd_list);
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free(mrd, M_DEVBUF);
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}
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}
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void
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domountroothook()
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{
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struct mountroothook_desc *mrd;
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for (mrd = mountroothook_list.lh_first; mrd != NULL;
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mrd = mrd->mrd_list.le_next) {
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if (mrd->mrd_device == root_device) {
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(*mrd->mrd_func)(root_device);
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return;
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}
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}
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}
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/*
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* Determine the root device and, if instructed to, the root file system.
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*/
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#include "md.h"
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#if NMD == 0
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#undef MEMORY_DISK_HOOKS
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#endif
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#ifdef MEMORY_DISK_HOOKS
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static struct device fakemdrootdev[NMD];
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#endif
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void
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setroot(bootdv, bootpartition, nam2blk)
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struct device *bootdv;
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int bootpartition;
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struct devnametobdevmaj *nam2blk;
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{
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struct device *dv;
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int len, print_newline = 0;
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dev_t nrootdev;
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dev_t ndumpdev = NODEV;
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char buf[128];
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const char *rootdevname;
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const char *dumpdevname;
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struct device *rootdv = NULL; /* XXX gcc -Wuninitialized */
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struct device *dumpdv = NULL;
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struct ifnet *ifp;
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const char *deffsname;
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struct vfsops *vops;
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extern int (*mountroot) __P((void));
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static struct devnametobdevmaj *last_nam2blk;
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if (nam2blk == NULL) {
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if (last_nam2blk == NULL)
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panic("setroot: no name to bdev major map");
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nam2blk = last_nam2blk;
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}
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last_nam2blk = nam2blk;
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#ifdef MEMORY_DISK_HOOKS
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for (i = 0; i < NMD; i++) {
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fakemdrootdev[i].dv_class = DV_DISK;
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fakemdrootdev[i].dv_cfdata = NULL;
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fakemdrootdev[i].dv_unit = i;
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fakemdrootdev[i].dv_parent = NULL;
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sprintf(fakemdrootdev[i].dv_xname, "md%d", i);
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}
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#endif /* MEMORY_DISK_HOOKS */
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#ifdef MEMORY_DISK_IS_ROOT
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bootdv = &fakemdrootdev[0];
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bootpartition = 0;
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#endif
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/*
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* If NFS is specified as the file system, and we found
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* a DV_DISK boot device (or no boot device at all), then
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* find a reasonable network interface for "rootspec".
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*/
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vops = vfs_getopsbyname("nfs");
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if (vops != NULL && vops->vfs_mountroot == mountroot &&
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rootspec == NULL &&
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(bootdv == NULL || bootdv->dv_class != DV_IFNET)) {
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for (ifp = ifnet.tqh_first; ifp != NULL;
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ifp = ifp->if_list.tqe_next)
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if ((ifp->if_flags &
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(IFF_LOOPBACK|IFF_POINTOPOINT)) == 0)
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break;
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if (ifp == NULL) {
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/*
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* Can't find a suitable interface; ask the
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* user.
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*/
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boothowto |= RB_ASKNAME;
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} else {
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/*
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* Have a suitable interface; behave as if
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* the user specified this interface.
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*/
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rootspec = (const char *)ifp->if_xname;
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}
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}
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/*
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* If wildcarded root and we the boot device wasn't determined,
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* ask the user.
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*/
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if (rootspec == NULL && bootdv == NULL)
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boothowto |= RB_ASKNAME;
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top:
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if (boothowto & RB_ASKNAME) {
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struct device *defdumpdv;
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for (;;) {
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printf("root device");
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if (bootdv != NULL) {
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printf(" (default %s", bootdv->dv_xname);
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if (bootdv->dv_class == DV_DISK)
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printf("%c", bootpartition + 'a');
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printf(")");
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}
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printf(": ");
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len = getstr(buf, sizeof(buf));
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if (len == 0 && bootdv != NULL) {
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strcpy(buf, bootdv->dv_xname);
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len = strlen(buf);
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}
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if (len > 0 && buf[len - 1] == '*') {
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buf[--len] = '\0';
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dv = getdisk(buf, len, 1, nam2blk,
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&nrootdev, 0);
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if (dv != NULL) {
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rootdv = dv;
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break;
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}
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}
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dv = getdisk(buf, len, bootpartition, nam2blk,
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&nrootdev, 0);
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if (dv != NULL) {
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rootdv = dv;
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break;
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}
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}
|
|
|
|
/*
|
|
* Set up the default dump device. If root is on
|
|
* a network device, there is no default dump
|
|
* device, since we don't support dumps to the
|
|
* network.
|
|
*/
|
|
if (rootdv->dv_class == DV_IFNET)
|
|
defdumpdv = NULL;
|
|
else
|
|
defdumpdv = rootdv;
|
|
|
|
for (;;) {
|
|
printf("dump device");
|
|
if (defdumpdv != NULL) {
|
|
/*
|
|
* Note, we know it's a disk if we get here.
|
|
*/
|
|
printf(" (default %sb)", defdumpdv->dv_xname);
|
|
}
|
|
printf(": ");
|
|
len = getstr(buf, sizeof(buf));
|
|
if (len == 0) {
|
|
if (defdumpdv != NULL) {
|
|
ndumpdev = MAKEDISKDEV(major(nrootdev),
|
|
DISKUNIT(nrootdev), 1);
|
|
}
|
|
if (rootdv->dv_class == DV_IFNET)
|
|
dumpdv = NULL;
|
|
else
|
|
dumpdv = rootdv;
|
|
break;
|
|
}
|
|
if (len == 4 && strcmp(buf, "none") == 0) {
|
|
dumpspec = "none";
|
|
goto havedump;
|
|
}
|
|
dv = getdisk(buf, len, 1, nam2blk, &ndumpdev, 1);
|
|
if (dv) {
|
|
dumpdv = dv;
|
|
break;
|
|
}
|
|
}
|
|
|
|
havedump:
|
|
rootdev = nrootdev;
|
|
dumpdev = ndumpdev;
|
|
|
|
for (vops = LIST_FIRST(&vfs_list); vops != NULL;
|
|
vops = LIST_NEXT(vops, vfs_list)) {
|
|
if (vops->vfs_mountroot != NULL &&
|
|
vops->vfs_mountroot == mountroot)
|
|
break;
|
|
}
|
|
|
|
if (vops == NULL) {
|
|
mountroot = NULL;
|
|
deffsname = "generic";
|
|
} else
|
|
deffsname = vops->vfs_name;
|
|
|
|
for (;;) {
|
|
printf("file system (default %s): ", deffsname);
|
|
len = getstr(buf, sizeof(buf));
|
|
if (len == 0)
|
|
break;
|
|
if (len == 4 && strcmp(buf, "halt") == 0)
|
|
cpu_reboot(RB_HALT, NULL);
|
|
else if (len == 7 && strcmp(buf, "generic") == 0) {
|
|
mountroot = NULL;
|
|
break;
|
|
}
|
|
vops = vfs_getopsbyname(buf);
|
|
if (vops == NULL || vops->vfs_mountroot == NULL) {
|
|
printf("use one of: generic");
|
|
for (vops = LIST_FIRST(&vfs_list);
|
|
vops != NULL;
|
|
vops = LIST_NEXT(vops, vfs_list)) {
|
|
if (vops->vfs_mountroot != NULL)
|
|
printf(" %s", vops->vfs_name);
|
|
}
|
|
printf(" halt\n");
|
|
} else {
|
|
mountroot = vops->vfs_mountroot;
|
|
break;
|
|
}
|
|
}
|
|
|
|
} else if (rootspec == NULL) {
|
|
int majdev;
|
|
|
|
/*
|
|
* Wildcarded root; use the boot device.
|
|
*/
|
|
rootdv = bootdv;
|
|
|
|
majdev = findblkmajor(bootdv->dv_xname, nam2blk);
|
|
if (majdev >= 0) {
|
|
/*
|
|
* Root is on a disk. `bootpartition' is root.
|
|
*/
|
|
rootdev = MAKEDISKDEV(majdev, bootdv->dv_unit,
|
|
bootpartition);
|
|
}
|
|
} else {
|
|
|
|
/*
|
|
* `root on <dev> ...'
|
|
*/
|
|
|
|
/*
|
|
* If it's a network interface, we can bail out
|
|
* early.
|
|
*/
|
|
for (dv = alldevs.tqh_first; dv != NULL;
|
|
dv = dv->dv_list.tqe_next)
|
|
if (strcmp(dv->dv_xname, rootspec) == 0)
|
|
break;
|
|
if (dv != NULL && dv->dv_class == DV_IFNET) {
|
|
rootdv = dv;
|
|
goto haveroot;
|
|
}
|
|
|
|
rootdevname = findblkname(major(rootdev), nam2blk);
|
|
if (rootdevname == NULL) {
|
|
printf("unknown device major 0x%x\n", rootdev);
|
|
boothowto |= RB_ASKNAME;
|
|
goto top;
|
|
}
|
|
bzero(buf, sizeof(buf));
|
|
sprintf(buf, "%s%d", rootdevname, DISKUNIT(rootdev));
|
|
|
|
for (dv = alldevs.tqh_first; dv != NULL;
|
|
dv = dv->dv_list.tqe_next) {
|
|
if (strcmp(buf, dv->dv_xname) == 0) {
|
|
rootdv = dv;
|
|
break;
|
|
}
|
|
}
|
|
if (rootdv == NULL) {
|
|
printf("device %s (0x%x) not configured\n",
|
|
buf, rootdev);
|
|
boothowto |= RB_ASKNAME;
|
|
goto top;
|
|
}
|
|
}
|
|
|
|
haveroot:
|
|
|
|
root_device = rootdv;
|
|
|
|
switch (rootdv->dv_class) {
|
|
case DV_IFNET:
|
|
/* Nothing. */
|
|
break;
|
|
|
|
case DV_DISK:
|
|
printf("root on %s%c", rootdv->dv_xname,
|
|
DISKPART(rootdev) + 'a');
|
|
print_newline = 1;
|
|
break;
|
|
|
|
default:
|
|
printf("can't determine root device\n");
|
|
boothowto |= RB_ASKNAME;
|
|
goto top;
|
|
}
|
|
|
|
/*
|
|
* Now configure the dump device.
|
|
*/
|
|
|
|
if (dumpspec != NULL && strcmp(dumpspec, "none") == 0) {
|
|
/*
|
|
* Operator doesn't want a dump device.
|
|
*/
|
|
goto nodumpdev;
|
|
}
|
|
|
|
/*
|
|
* If we haven't figured out the dump device, do so, with
|
|
* the following rules:
|
|
*
|
|
* (a) We already know dumpdv in the RB_ASKNAME case.
|
|
*
|
|
* (b) If dumpspec is set, try to use it. If the device
|
|
* is not available, punt.
|
|
*
|
|
* (c) If dumpspec is not set, the dump device is
|
|
* wildcarded or unspecified. If the root device
|
|
* is DV_IFNET, punt. Otherwise, use partition b
|
|
* of the root device.
|
|
*/
|
|
|
|
if (boothowto & RB_ASKNAME) {
|
|
if (dumpdv == NULL) {
|
|
/*
|
|
* Just return; dumpdev is already set to NODEV
|
|
* and we don't want to print a newline in this
|
|
* case.
|
|
*/
|
|
return;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (dumpspec != NULL) {
|
|
if (dumpdev == NODEV) {
|
|
/*
|
|
* Looks like they tried to pick a network
|
|
* device. Oops.
|
|
*/
|
|
goto nodumpdev;
|
|
}
|
|
|
|
dumpdevname = findblkname(major(dumpdev), nam2blk);
|
|
if (dumpdevname == NULL)
|
|
goto nodumpdev;
|
|
bzero(buf, sizeof(buf));
|
|
sprintf(buf, "%s%d", dumpdevname, DISKUNIT(dumpdev));
|
|
|
|
for (dv = alldevs.tqh_first; dv != NULL;
|
|
dv = dv->dv_list.tqe_next) {
|
|
if (strcmp(buf, dv->dv_xname) == 0) {
|
|
dumpdv = dv;
|
|
break;
|
|
}
|
|
}
|
|
if (dv == NULL) {
|
|
/*
|
|
* Device not configured.
|
|
*/
|
|
goto nodumpdev;
|
|
}
|
|
} else if (rootdv->dv_class == DV_IFNET)
|
|
goto nodumpdev;
|
|
else {
|
|
dumpdv = rootdv;
|
|
dumpdev = MAKEDISKDEV(major(rootdev), dumpdv->dv_unit, 1);
|
|
}
|
|
|
|
out:
|
|
printf(" dumps on %s%c\n", dumpdv->dv_xname, DISKPART(dumpdev) + 'a');
|
|
return;
|
|
|
|
nodumpdev:
|
|
dumpdev = NODEV;
|
|
if (print_newline)
|
|
printf("\n");
|
|
}
|
|
|
|
static int
|
|
findblkmajor(name, nam2blk)
|
|
const char *name;
|
|
struct devnametobdevmaj *nam2blk;
|
|
{
|
|
int i;
|
|
|
|
if (nam2blk == NULL)
|
|
return (-1);
|
|
|
|
for (i = 0; nam2blk[i].d_name != NULL; i++)
|
|
if (strncmp(name, nam2blk[i].d_name,
|
|
strlen(nam2blk[i].d_name)) == 0)
|
|
return (nam2blk[i].d_maj);
|
|
return (-1);
|
|
}
|
|
|
|
const char *
|
|
findblkname(maj, nam2blk)
|
|
int maj;
|
|
struct devnametobdevmaj *nam2blk;
|
|
{
|
|
int i;
|
|
|
|
if (nam2blk == NULL)
|
|
return (NULL);
|
|
|
|
for (i = 0; nam2blk[i].d_name != NULL; i++)
|
|
if (nam2blk[i].d_maj == maj)
|
|
return (nam2blk[i].d_name);
|
|
return (NULL);
|
|
}
|
|
|
|
static struct device *
|
|
getdisk(str, len, defpart, nam2blk, devp, isdump)
|
|
char *str;
|
|
int len, defpart;
|
|
struct devnametobdevmaj *nam2blk;
|
|
dev_t *devp;
|
|
int isdump;
|
|
{
|
|
struct device *dv;
|
|
#ifdef MEMORY_DISK_HOOKS
|
|
int i;
|
|
#endif
|
|
|
|
if ((dv = parsedisk(str, len, defpart, nam2blk, devp)) == NULL) {
|
|
printf("use one of:");
|
|
#ifdef MEMORY_DISK_HOOKS
|
|
if (isdump == 0)
|
|
for (i = 0; i < NMD; i++)
|
|
printf(" %s[a-%c]", fakemdrootdev[i].dv_xname,
|
|
'a' + MAXPARTITIONS - 1);
|
|
#endif
|
|
for (dv = alldevs.tqh_first; dv != NULL;
|
|
dv = dv->dv_list.tqe_next) {
|
|
if (dv->dv_class == DV_DISK)
|
|
printf(" %s[a-%c]", dv->dv_xname,
|
|
'a' + MAXPARTITIONS - 1);
|
|
if (isdump == 0 && dv->dv_class == DV_IFNET)
|
|
printf(" %s", dv->dv_xname);
|
|
}
|
|
if (isdump)
|
|
printf(" none");
|
|
printf(" halt\n");
|
|
}
|
|
return (dv);
|
|
}
|
|
|
|
static struct device *
|
|
parsedisk(str, len, defpart, nam2blk, devp)
|
|
char *str;
|
|
int len, defpart;
|
|
struct devnametobdevmaj *nam2blk;
|
|
dev_t *devp;
|
|
{
|
|
struct device *dv;
|
|
char *cp, c;
|
|
int majdev, part;
|
|
#ifdef MEMORY_DISK_HOOKS
|
|
int i;
|
|
#endif
|
|
|
|
if (len == 0)
|
|
return (NULL);
|
|
|
|
if (len == 4 && strcmp(str, "halt") == 0)
|
|
cpu_reboot(RB_HALT, NULL);
|
|
|
|
cp = str + len - 1;
|
|
c = *cp;
|
|
if (c >= 'a' && c <= ('a' + MAXPARTITIONS - 1)) {
|
|
part = c - 'a';
|
|
*cp = '\0';
|
|
} else
|
|
part = defpart;
|
|
|
|
#ifdef MEMORY_DISK_HOOKS
|
|
for (i = 0; i < NMD; i++)
|
|
if (strcmp(str, fakemdrootdev[i].dv_xname) == 0) {
|
|
dv = &fakemdrootdev[i];
|
|
goto gotdisk;
|
|
}
|
|
#endif
|
|
|
|
for (dv = alldevs.tqh_first; dv != NULL; dv = dv->dv_list.tqe_next) {
|
|
if (dv->dv_class == DV_DISK &&
|
|
strcmp(str, dv->dv_xname) == 0) {
|
|
#ifdef MEMORY_DISK_HOOKS
|
|
gotdisk:
|
|
#endif
|
|
majdev = findblkmajor(dv->dv_xname, nam2blk);
|
|
if (majdev < 0)
|
|
panic("parsedisk");
|
|
*devp = MAKEDISKDEV(majdev, dv->dv_unit, part);
|
|
break;
|
|
}
|
|
|
|
if (dv->dv_class == DV_IFNET &&
|
|
strcmp(str, dv->dv_xname) == 0) {
|
|
*devp = NODEV;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*cp = c;
|
|
return (dv);
|
|
}
|
|
|
|
/*
|
|
* XXX shouldn't this be a common function?
|
|
*/
|
|
static int
|
|
getstr(cp, size)
|
|
char *cp;
|
|
int size;
|
|
{
|
|
char *lp;
|
|
int c, len;
|
|
|
|
cnpollc(1);
|
|
|
|
lp = cp;
|
|
len = 0;
|
|
for (;;) {
|
|
c = cngetc();
|
|
switch (c) {
|
|
case '\n':
|
|
case '\r':
|
|
printf("\n");
|
|
*lp++ = '\0';
|
|
cnpollc(0);
|
|
return (len);
|
|
case '\b':
|
|
case '\177':
|
|
case '#':
|
|
if (len) {
|
|
--len;
|
|
--lp;
|
|
printf("\b \b");
|
|
}
|
|
continue;
|
|
case '@':
|
|
case 'u'&037:
|
|
len = 0;
|
|
lp = cp;
|
|
printf("\n");
|
|
continue;
|
|
default:
|
|
if (len + 1 >= size || c < ' ') {
|
|
printf("\007");
|
|
continue;
|
|
}
|
|
printf("%c", c);
|
|
++len;
|
|
*lp++ = c;
|
|
}
|
|
}
|
|
}
|