607 lines
14 KiB
C
607 lines
14 KiB
C
/* $NetBSD: vnconfig.c,v 1.41 2013/06/09 13:25:40 christos Exp $ */
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/*-
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* Copyright (c) 1997 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.
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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) 1993 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 $Hdr: vnconfig.c 1.1 93/12/15$
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*
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* @(#)vnconfig.c 8.1 (Berkeley) 12/15/93
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*/
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#ifndef __minix
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#include <sys/buf.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <sys/bitops.h>
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#else
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#include <minix/paths.h>
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#include <sys/wait.h>
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#endif
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#include <dev/vndvar.h>
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#include <disktab.h>
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#include <err.h>
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <util.h>
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#include <paths.h>
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#define VND_CONFIG 1
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#define VND_UNCONFIG 2
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#define VND_GET 3
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static int verbose = 0;
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static int readonly = 0;
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static int force = 0;
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static int compressed = 0;
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static char *tabname;
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#ifdef __minix
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static int service = 1;
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#endif
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#ifndef __minix
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static void show(int, int);
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#else
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static void show(const char *, int);
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#endif
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static int config(char *, char *, char *, int);
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static int getgeom(struct vndgeom *, char *);
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__dead static void usage(void);
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#ifdef __minix
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/*
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* Start a driver instance for the given vnd name. The return value indicates
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* whether the instance has been started successfully.
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*/
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static int
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start_service(char *dev)
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{
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char *p, *endp, cmd[PATH_MAX];
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int n, status;
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p = strrchr(dev, '/');
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if (p == NULL) p = dev;
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else p++;
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/*
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* There are two alternatives to get the instance number for the
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* driver: either we scan the given device name, or we obtain its major
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* number. We choose to scan the name, because major numbers are more
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* likely to change in the future.
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*/
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if (strncmp(p, "vnd", 3) != 0)
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return 0;
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n = strtoul(p + 3, &endp, 10);
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if (endp[0])
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return 0;
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if (verbose)
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printf("%s: starting driver\n", dev);
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snprintf(cmd, sizeof(cmd),
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"%s up %s/vnd -label vnd%u -args instance=%u -dev %s",
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_PATH_SERVICE, _PATH_DRIVERS, n, n, dev);
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status = system(cmd);
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if (!WIFEXITED(status))
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return 0;
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return !WEXITSTATUS(status);
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}
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/*
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* Stop the driver instance responsible for the given file descriptor.
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* The file descriptor is closed upon return.
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*/
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static void
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stop_service(int fd, char *dev)
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{
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char cmd[PATH_MAX];
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struct vnd_user vnu;
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int openct, stop = 0;
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/* Only shut down the driver if the device is opened once, by us. */
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if (ioctl(fd, DIOCOPENCT, &openct) == 0 && openct == 1) {
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/* We let the driver tell us what instance number it has. */
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if (ioctl(fd, VNDIOCGET, &vnu) == 0)
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stop = 1;
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}
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/* Close the file descriptor before shutting down the driver! */
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(void) close(fd);
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if (stop) {
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if (verbose)
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printf("%s: stopping driver\n", dev);
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snprintf(cmd, sizeof(cmd), "%s down vnd%u", _PATH_SERVICE,
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vnu.vnu_unit);
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system(cmd);
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}
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}
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#endif
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int
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main(int argc, char *argv[])
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{
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int ch, rv, action = VND_CONFIG;
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#ifndef __minix
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while ((ch = getopt(argc, argv, "Fcf:lrt:uvz")) != -1) {
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#else
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/* MINIX3: added -S; no support for -f, -t, -z at this time. */
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while ((ch = getopt(argc, argv, "SFclruv")) != -1) {
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#endif
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switch (ch) {
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#ifdef __minix
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case 'S':
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service = 0;
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break;
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#endif
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case 'F':
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force = 1;
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break;
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case 'c':
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action = VND_CONFIG;
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break;
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case 'f':
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#ifndef __minix
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if (setdisktab(optarg) == -1)
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usage();
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#endif
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break;
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case 'l':
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action = VND_GET;
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break;
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case 'r':
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readonly = 1;
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break;
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case 't':
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tabname = optarg;
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break;
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case 'u':
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action = VND_UNCONFIG;
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break;
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case 'v':
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verbose = 1;
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break;
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case 'z':
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compressed = 1;
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readonly = 1;
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break;
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default:
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case '?':
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usage();
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/* NOTREACHED */
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}
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}
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argc -= optind;
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argv += optind;
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if (action == VND_CONFIG) {
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if ((argc < 2 || argc > 3) ||
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(argc == 3 && tabname != NULL))
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usage();
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rv = config(argv[0], argv[1], (argc == 3) ? argv[2] : NULL,
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action);
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} else if (action == VND_UNCONFIG) {
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if (argc != 1 || tabname != NULL)
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usage();
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rv = config(argv[0], NULL, NULL, action);
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} else { /* VND_GET */
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#ifndef __minix
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int n, v;
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const char *vn;
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char path[64];
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#else
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int n;
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#endif
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if (argc != 0 && argc != 1)
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usage();
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#ifndef __minix
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vn = argc ? argv[0] : "vnd0";
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v = opendisk(vn, O_RDONLY, path, sizeof(path), 0);
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if (v == -1)
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err(1, "open: %s", vn);
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#endif
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if (argc)
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#ifndef __minix
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show(v, -1);
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#else
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show(argv[0], -1);
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#endif
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else {
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DIR *dirp;
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struct dirent *dp;
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#ifndef __minix
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__BITMAP_TYPE(, uint32_t, 65536) bm;
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__BITMAP_ZERO(&bm);
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#else
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char *endp;
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#endif
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if ((dirp = opendir(_PATH_DEV)) == NULL)
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err(1, "opendir: %s", _PATH_DEV);
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while ((dp = readdir(dirp)) != NULL) {
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#ifndef __minix
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if (strncmp(dp->d_name, "rvnd", 4) != 0)
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continue;
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n = atoi(dp->d_name + 4);
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if (__BITMAP_ISSET(n, &bm))
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continue;
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__BITMAP_SET(n, &bm);
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show(v, n);
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#else
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if (strncmp(dp->d_name, "vnd", 3) != 0)
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continue;
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n = strtoul(dp->d_name + 3, &endp, 10);
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if (endp[0])
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continue;
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show(dp->d_name, n);
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#endif
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}
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closedir(dirp);
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}
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#ifndef __minix
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close(v);
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#endif
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rv = 0;
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}
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return rv;
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}
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static void
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#ifndef __minix
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show(int v, int n)
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#else
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show(const char *vn, int n)
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#endif
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{
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struct vnd_user vnu;
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char *dev;
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struct statvfs *mnt;
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int i, nmount;
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#ifdef __minix
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int v;
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char path[PATH_MAX];
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v = opendisk(vn, O_RDONLY, path, sizeof(path), 0);
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if (v == -1) {
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if (n == -1)
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err(1, "open: %s", vn);
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else
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printf("vnd%d: not in use\n", n);
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return;
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}
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#endif
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vnu.vnu_unit = n;
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if (ioctl(v, VNDIOCGET, &vnu) == -1)
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err(1, "VNDIOCGET");
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#ifdef __minix
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close(v);
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#endif
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if (vnu.vnu_ino == 0) {
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printf("vnd%d: not in use\n", vnu.vnu_unit);
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return;
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}
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printf("vnd%d: ", vnu.vnu_unit);
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dev = devname(vnu.vnu_dev, S_IFBLK);
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if (dev != NULL)
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nmount = getmntinfo(&mnt, MNT_NOWAIT);
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else {
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mnt = NULL;
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nmount = 0;
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}
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if (mnt != NULL) {
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for (i = 0; i < nmount; i++) {
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if (strncmp(mnt[i].f_mntfromname, "/dev/", 5) == 0 &&
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strcmp(mnt[i].f_mntfromname + 5, dev) == 0)
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break;
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}
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if (i < nmount)
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printf("%s (%s) ", mnt[i].f_mntonname,
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mnt[i].f_mntfromname);
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else
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printf("%s ", dev);
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}
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else if (dev != NULL)
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printf("%s ", dev);
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else
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printf("dev %llu,%llu ",
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(unsigned long long)major(vnu.vnu_dev),
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(unsigned long long)minor(vnu.vnu_dev));
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printf("inode %llu\n", (unsigned long long)vnu.vnu_ino);
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}
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static int
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config(char *dev, char *file, char *geom, int action)
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{
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struct vnd_ioctl vndio;
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#ifndef __minix
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struct disklabel *lp;
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#else
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int stop = 0;
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#endif
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char rdev[MAXPATHLEN + 1];
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int fd, rv;
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#ifdef __minix
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/*
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* MINIX does not have the concept of raw devices. As such, the access
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* checks that apply to opening block devices, automatically apply here
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* as well. Therefore, we must open the device as read-only, or we
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* would be unable to un-configure a device that was configured as
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* read-only: opening such a device as read-write would fail.
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*/
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fd = opendisk(dev, O_RDONLY, rdev, sizeof(rdev), 0);
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if (fd < 0 && errno == ENXIO && action == VND_CONFIG && service) {
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stop = start_service(rdev);
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fd = opendisk(dev, O_RDONLY, rdev, sizeof(rdev), 0);
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}
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#else
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fd = opendisk(dev, O_RDWR, rdev, sizeof(rdev), 0);
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#endif
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if (fd < 0) {
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warn("%s: opendisk", rdev);
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return (1);
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}
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memset(&vndio, 0, sizeof(vndio));
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#ifdef __GNUC__
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rv = 0; /* XXX */
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#endif
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#ifndef __minix
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vndio.vnd_file = file;
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#endif
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if (geom != NULL) {
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rv = getgeom(&vndio.vnd_geom, geom);
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#ifdef __minix
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if (rv && stop)
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stop_service(fd, rdev);
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#endif
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if (rv != 0)
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errx(1, "invalid geometry: %s", geom);
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vndio.vnd_flags = VNDIOF_HASGEOM;
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#ifndef __minix
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} else if (tabname != NULL) {
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lp = getdiskbyname(tabname);
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if (lp == NULL)
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errx(1, "unknown disk type: %s", tabname);
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vndio.vnd_geom.vng_secsize = lp->d_secsize;
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vndio.vnd_geom.vng_nsectors = lp->d_nsectors;
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vndio.vnd_geom.vng_ntracks = lp->d_ntracks;
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vndio.vnd_geom.vng_ncylinders = lp->d_ncylinders;
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vndio.vnd_flags = VNDIOF_HASGEOM;
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#endif
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}
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if (readonly)
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vndio.vnd_flags |= VNDIOF_READONLY;
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#ifndef __minix
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if (compressed)
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vndio.vnd_flags |= VNF_COMP;
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#endif
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/*
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* Clear (un-configure) the device
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*/
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if (action == VND_UNCONFIG) {
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if (force)
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vndio.vnd_flags |= VNDIOF_FORCE;
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rv = ioctl(fd, VNDIOCCLR, &vndio);
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#ifdef VNDIOOCCLR
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if (rv && errno == ENOTTY)
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rv = ioctl(fd, VNDIOOCCLR, &vndio);
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#endif
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if (rv)
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warn("%s: VNDIOCCLR", rdev);
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else if (verbose)
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printf("%s: cleared\n", rdev);
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#ifdef __minix
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if (!rv && service)
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stop = 2;
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#endif
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}
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/*
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* Configure the device
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*/
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if (action == VND_CONFIG) {
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int ffd;
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ffd = open(file, readonly ? O_RDONLY : O_RDWR);
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if (ffd < 0)
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warn("%s", file);
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else {
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#ifndef __minix
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(void) close(ffd);
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#else
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vndio.vnd_fildes = ffd;
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#endif
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rv = ioctl(fd, VNDIOCSET, &vndio);
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#ifdef VNDIOOCSET
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if (rv && errno == ENOTTY) {
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rv = ioctl(fd, VNDIOOCSET, &vndio);
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vndio.vnd_size = vndio.vnd_osize;
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}
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#endif
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#ifdef __minix
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(void) close(ffd);
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#endif
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if (rv)
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warn("%s: VNDIOCSET", rdev);
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else if (verbose) {
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printf("%s: %" PRIu64 " bytes on %s", rdev,
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vndio.vnd_size, file);
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if (vndio.vnd_flags & VNDIOF_HASGEOM)
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printf(" using geometry %d/%d/%d/%d",
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vndio.vnd_geom.vng_secsize,
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vndio.vnd_geom.vng_nsectors,
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vndio.vnd_geom.vng_ntracks,
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vndio.vnd_geom.vng_ncylinders);
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printf("\n");
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}
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}
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#ifdef __minix
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if ((ffd < 0 || rv) && service)
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stop++;
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#endif
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}
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#ifdef __minix
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if (stop >= 2)
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stop_service(fd, rdev);
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|
else
|
|
#endif
|
|
(void) close(fd);
|
|
fflush(stdout);
|
|
return (rv < 0);
|
|
}
|
|
|
|
static int
|
|
getgeom(struct vndgeom *vng, char *cp)
|
|
{
|
|
char *secsize, *nsectors, *ntracks, *ncylinders;
|
|
|
|
#define GETARG(arg) \
|
|
do { \
|
|
if (cp == NULL || *cp == '\0') \
|
|
return (1); \
|
|
arg = strsep(&cp, "/"); \
|
|
if (arg == NULL) \
|
|
return (1); \
|
|
} while (0)
|
|
|
|
GETARG(secsize);
|
|
GETARG(nsectors);
|
|
GETARG(ntracks);
|
|
GETARG(ncylinders);
|
|
|
|
#undef GETARG
|
|
|
|
/* Too many? */
|
|
if (cp != NULL)
|
|
return (1);
|
|
|
|
#define CVTARG(str, num) \
|
|
do { \
|
|
num = strtol(str, &cp, 10); \
|
|
if (*cp != '\0') \
|
|
return (1); \
|
|
} while (0)
|
|
|
|
CVTARG(secsize, vng->vng_secsize);
|
|
CVTARG(nsectors, vng->vng_nsectors);
|
|
CVTARG(ntracks, vng->vng_ntracks);
|
|
CVTARG(ncylinders, vng->vng_ncylinders);
|
|
|
|
#undef CVTARG
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
|
|
(void)fprintf(stderr, "%s%s",
|
|
#ifndef __minix
|
|
"usage: vnconfig [-crvz] [-f disktab] [-t typename] vnode_disk"
|
|
" regular-file [geomspec]\n",
|
|
" vnconfig -u [-Fv] vnode_disk\n"
|
|
#else
|
|
"usage: vnconfig [-Scrv] vnode_disk regular-file [geomspec]\n",
|
|
" vnconfig -u [-SFv] vnode_disk\n"
|
|
#endif
|
|
" vnconfig -l [vnode_disk]\n");
|
|
exit(1);
|
|
}
|