735 lines
16 KiB
C
735 lines
16 KiB
C
/* $NetBSD: ccdconfig.c,v 1.49 2009/03/16 12:52:07 lukem Exp $ */
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/*-
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* Copyright (c) 1996, 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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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1996, 1997\
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The NetBSD Foundation, Inc. All rights reserved.");
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__RCSID("$NetBSD: ccdconfig.c,v 1.49 2009/03/16 12:52:07 lukem Exp $");
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#endif
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/disklabel.h>
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#include <sys/disk.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.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 <dev/ccdvar.h>
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#include "pathnames.h"
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static size_t lineno;
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static gid_t egid;
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static int verbose;
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static const char *ccdconf = _PATH_CCDCONF;
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static char *core;
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static char *kernel;
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struct flagval {
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const char *fv_flag;
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int fv_val;
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} flagvaltab[] = {
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{ "CCDF_UNIFORM", CCDF_UNIFORM },
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{ "CCDF_NOLABEL", CCDF_NOLABEL },
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{ NULL, 0 },
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};
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static struct nlist nl[] = {
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{ .n_name = "_ccd_softc" },
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#define SYM_CCDSOFTC 0
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{ .n_name = "_numccd" },
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#define SYM_NUMCCD 1
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{ .n_name = "_ccd_softc_elemsize" },
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#define SYM_CCDSOFTCELEMSIZE 2
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{ .n_name = NULL },
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};
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#define CCD_CONFIG 0 /* configure a device */
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#define CCD_CONFIGALL 1 /* configure all devices */
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#define CCD_UNCONFIG 2 /* unconfigure a device */
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#define CCD_UNCONFIGALL 3 /* unconfigure all devices */
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#define CCD_DUMP 4 /* dump a ccd's configuration */
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static int checkdev(char *);
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static int do_io(char *, u_long, struct ccd_ioctl *);
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static int do_single(int, char **, int);
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static int do_all(int);
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static int dump_ccd(int, char **, int);
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static int flags_to_val(char *);
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static int pathtounit(char *, int *);
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static void print_ccd_info(struct ccd_softc *, kvm_t *);
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static char *resolve_ccdname(char *);
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static void usage(void);
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int
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main(int argc, char *argv[])
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{
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int ch, options = 0, action = CCD_CONFIG;
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egid = getegid();
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setegid(getgid());
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while ((ch = getopt(argc, argv, "cCf:gM:N:uUv")) != -1) {
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switch (ch) {
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case 'c':
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action = CCD_CONFIG;
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++options;
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break;
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case 'C':
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action = CCD_CONFIGALL;
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++options;
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break;
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case 'f':
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ccdconf = optarg;
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break;
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case 'g':
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action = CCD_DUMP;
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break;
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case 'M':
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core = optarg;
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break;
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case 'N':
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kernel = optarg;
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break;
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case 'u':
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action = CCD_UNCONFIG;
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++options;
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break;
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case 'U':
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action = CCD_UNCONFIGALL;
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++options;
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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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default:
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usage();
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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 (options > 1)
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usage();
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/*
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* Discard setgid privileges. If not the running kernel, we toss
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* them away totally so that bad guys can't print interesting stuff
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* from kernel memory, otherwise switch back to kmem for the
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* duration of the kvm_openfiles() call.
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*
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* We also do this if we aren't just looking...
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*/
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if (core != NULL || kernel != NULL || action != CCD_DUMP)
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setgid(getgid());
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switch (action) {
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case CCD_CONFIG:
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case CCD_UNCONFIG:
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exit(do_single(argc, argv, action));
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/* NOTREACHED */
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case CCD_CONFIGALL:
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case CCD_UNCONFIGALL:
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exit(do_all(action));
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/* NOTREACHED */
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case CCD_DUMP:
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default:
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exit(dump_ccd(argc, argv, action));
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/* NOTREACHED */
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}
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/* NOTREACHED */
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}
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static int
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do_single(int argc, char **argv, int action)
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{
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struct ccd_ioctl ccio;
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char *ccd, *cp, *cp2, **disks;
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int noflags = 0, i, ileave, flags, j;
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unsigned int ui;
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flags = 0;
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memset(&ccio, 0, sizeof(ccio));
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/*
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* If unconfiguring, all arguments are treated as ccds.
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*/
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if (action == CCD_UNCONFIG || action == CCD_UNCONFIGALL) {
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for (i = 0; argc != 0; ) {
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cp = *argv++; --argc;
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if ((ccd = resolve_ccdname(cp)) == NULL) {
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warnx("invalid ccd name: %s", cp);
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i = 1;
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continue;
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}
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if (do_io(ccd, CCDIOCCLR, &ccio))
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i = 1;
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else
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if (verbose)
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printf("%s unconfigured\n", cp);
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free(ccd);
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}
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return (i);
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}
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/* Make sure there are enough arguments. */
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if (argc < 4) {
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if (argc == 3) {
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/* Assume that no flags are specified. */
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noflags = 1;
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} else {
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if (action == CCD_CONFIGALL) {
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warnx("%s: bad line: %lu", ccdconf,
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(u_long)lineno);
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return (1);
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} else
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usage();
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}
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}
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/* First argument is the ccd to configure. */
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cp = *argv++; --argc;
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if ((ccd = resolve_ccdname(cp)) == NULL) {
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warnx("invalid ccd name: %s", cp);
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return (1);
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}
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/* Next argument is the interleave factor. */
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cp = *argv++; --argc;
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errno = 0; /* to check for ERANGE */
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ileave = (int)strtol(cp, &cp2, 10);
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if ((errno == ERANGE) || (ileave < 0) || (*cp2 != '\0')) {
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warnx("invalid interleave factor: %s", cp);
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free(ccd);
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return (1);
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}
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if (noflags == 0) {
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/* Next argument is the ccd configuration flags. */
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cp = *argv++; --argc;
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if ((flags = flags_to_val(cp)) < 0) {
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warnx("invalid flags argument: %s", cp);
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free(ccd);
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return (1);
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}
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}
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/* Next is the list of disks to make the ccd from. */
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disks = malloc(argc * sizeof(char *));
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if (disks == NULL) {
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warnx("no memory to configure ccd");
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free(ccd);
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return (1);
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}
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for (ui = 0; argc != 0; ) {
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cp = *argv++; --argc;
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if ((j = checkdev(cp)) == 0)
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disks[ui++] = cp;
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else {
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warnx("%s: %s", cp, strerror(j));
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free(ccd);
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free(disks);
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return (1);
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}
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}
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/* Fill in the ccio. */
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ccio.ccio_disks = disks;
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ccio.ccio_ndisks = ui;
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ccio.ccio_ileave = ileave;
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ccio.ccio_flags = flags;
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if (do_io(ccd, CCDIOCSET, &ccio)) {
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free(ccd);
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free(disks);
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return (1);
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}
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if (verbose) {
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printf("ccd%d: %d components ", ccio.ccio_unit,
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ccio.ccio_ndisks);
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for (ui = 0; ui < ccio.ccio_ndisks; ++ui) {
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if ((cp2 = strrchr(disks[ui], '/')) != NULL)
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++cp2;
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else
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cp2 = disks[ui];
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printf("%c%s%c",
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ui == 0 ? '(' : ' ', cp2,
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ui == ccio.ccio_ndisks - 1 ? ')' : ',');
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}
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printf(", %ld blocks ", (long)ccio.ccio_size);
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if (ccio.ccio_ileave != 0)
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printf("interleaved at %d blocks\n", ccio.ccio_ileave);
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else
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printf("concatenated\n");
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}
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free(ccd);
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free(disks);
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return (0);
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}
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static int
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do_all(int action)
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{
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FILE *f;
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char *line, *cp, *vp, **argv, **nargv;
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int argc, rval;
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size_t len;
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rval = 0;
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(void)setegid(getgid());
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if ((f = fopen(ccdconf, "r")) == NULL) {
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(void)setegid(egid);
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warn("fopen: %s", ccdconf);
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return (1);
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}
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(void)setegid(egid);
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while ((line = fparseln(f, &len, &lineno, "\\\\#", FPARSELN_UNESCALL))
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!= NULL) {
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argc = 0;
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argv = NULL;
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if (len == 0)
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goto end_of_line;
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for (cp = line; cp != NULL; ) {
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while ((vp = strsep(&cp, "\t ")) != NULL && *vp == '\0')
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;
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if (vp == NULL)
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continue;
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if ((nargv = realloc(argv,
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sizeof(char *) * (argc + 1))) == NULL) {
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warnx("no memory to configure ccds");
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return (1);
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}
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argv = nargv;
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argc++;
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argv[argc - 1] = vp;
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/*
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* If our action is to unconfigure all, then pass
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* just the first token to do_single() and ignore
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* the rest. Since this will be encountered on
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* our first pass through the line, the Right
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* Thing will happen.
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*/
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if (action == CCD_UNCONFIGALL) {
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if (do_single(argc, argv, action))
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rval = 1;
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goto end_of_line;
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}
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}
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if (argc != 0)
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if (do_single(argc, argv, action))
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rval = 1;
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end_of_line:
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if (argv != NULL)
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free(argv);
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free(line);
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}
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(void)fclose(f);
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return (rval);
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}
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static int
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checkdev(char *path)
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{
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struct stat st;
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if (stat(path, &st) != 0)
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return (errno);
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if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode))
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return (EINVAL);
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return (0);
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}
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static int
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pathtounit(char *path, int *unitp)
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{
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struct stat st;
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if (stat(path, &st) != 0)
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return (errno);
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if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode))
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return (EINVAL);
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*unitp = DISKUNIT(st.st_rdev);
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return (0);
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}
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static char *
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resolve_ccdname(char *name)
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{
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char c, *path;
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size_t len;
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int rawpart;
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if (name[0] == '/' || name[0] == '.') {
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/* Assume they gave the correct pathname. */
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return (strdup(name));
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}
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len = strlen(name);
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c = name[len - 1];
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if (isdigit((unsigned char)c)) {
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if ((rawpart = getrawpartition()) < 0)
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return (NULL);
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if (asprintf(&path, "/dev/%s%c", name, 'a' + rawpart) < 0)
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return (NULL);
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} else
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if (asprintf(&path, "/dev/%s", name) < 0)
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return (NULL);
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return (path);
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}
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static int
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do_io(char *path, u_long cmd, struct ccd_ioctl *cciop)
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{
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int fd;
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const char *cp;
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if ((fd = open(path, O_RDWR, 0640)) < 0) {
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warn("open: %s", path);
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return (1);
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}
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if (ioctl(fd, cmd, cciop) < 0) {
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switch (cmd) {
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case CCDIOCSET:
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cp = "CCDIOCSET";
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break;
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case CCDIOCCLR:
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cp = "CCDIOCCLR";
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break;
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default:
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cp = "unknown";
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}
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warn("ioctl (%s): %s", cp, path);
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return (1);
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}
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return (0);
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}
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#define KVM_ABORT(kd, str) { \
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(void)kvm_close((kd)); \
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warnx("%s", (str)); \
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warnx("%s", kvm_geterr((kd))); \
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return (1); \
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}
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static int
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dump_ccd(int argc, char **argv, int action)
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{
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char errbuf[_POSIX2_LINE_MAX], *ccd, *cp;
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struct ccd_softc *cs, *kcs;
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void *vcs;
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size_t readsize;
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int i, error, numccd, ccd_softc_elemsize, numconfiged = 0;
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kvm_t *kd;
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memset(errbuf, 0, sizeof(errbuf));
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vcs = NULL;
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(void)setegid(egid);
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if ((kd = kvm_openfiles(kernel, core, NULL, O_RDONLY,
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errbuf)) == NULL) {
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warnx("can't open kvm: %s", errbuf);
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return (1);
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}
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(void)setgid(getgid());
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if (kvm_nlist(kd, nl))
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KVM_ABORT(kd, "ccd-related symbols not available");
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/* Check to see how many ccds are currently configured. */
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if (kvm_read(kd, nl[SYM_NUMCCD].n_value, (void *)&numccd,
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sizeof(numccd)) != sizeof(numccd))
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KVM_ABORT(kd, "can't determine number of configured ccds");
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if (numccd == 0) {
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printf("ccd driver in kernel, but is uninitialized\n");
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goto done;
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}
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if (kvm_read(kd, nl[SYM_CCDSOFTCELEMSIZE].n_value,
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(void *)&ccd_softc_elemsize, sizeof(ccd_softc_elemsize))
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!= sizeof(ccd_softc_elemsize))
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KVM_ABORT(kd, "can't determine size of ccd_softc");
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/* Allocate space for the kernel's configuration data. */
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readsize = numccd * ccd_softc_elemsize;
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if ((vcs = malloc(readsize)) == NULL) {
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warnx("no memory for configuration data");
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goto bad;
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}
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memset(vcs, 0, readsize);
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/*
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* Read the ccd configuration data from the kernel.
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* The kernel's ccd_softc is larger than userland's
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* (the former contains extra structure members at
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* the end of the structure), so read the kernel
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* ccd_softcs into a temporary buffer and convert
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* into userland ccd_softcs.
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*/
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if (kvm_read(kd, nl[SYM_CCDSOFTC].n_value, (void *)&kcs,
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sizeof(kcs)) != sizeof(kcs)) {
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free(vcs);
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KVM_ABORT(kd, "can't find pointer to configuration data");
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}
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if ((size_t)kvm_read(kd, (u_long)kcs, vcs, readsize) != readsize) {
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free(vcs);
|
|
KVM_ABORT(kd, "can't read configuration data");
|
|
}
|
|
|
|
if ((cs = calloc(numccd, sizeof(struct ccd_softc))) == NULL) {
|
|
warnx("no memory for configuration data");
|
|
free(vcs);
|
|
goto bad;
|
|
}
|
|
for (i = 0; i < numccd; i++) {
|
|
memcpy(&cs[i], (char *)vcs + i * ccd_softc_elemsize,
|
|
sizeof(struct ccd_softc));
|
|
}
|
|
free(vcs);
|
|
|
|
/* Dump ccd configuration to stdout. */
|
|
if (argc == 0) {
|
|
for (i = 0; i < numccd; ++i)
|
|
if (cs[i].sc_flags & CCDF_INITED) {
|
|
++numconfiged;
|
|
print_ccd_info(&cs[i], kd);
|
|
}
|
|
|
|
if (numconfiged == 0)
|
|
printf("# no concatenated disks configured\n");
|
|
} else {
|
|
while (argc) {
|
|
cp = *argv++; --argc;
|
|
if ((ccd = resolve_ccdname(cp)) == NULL) {
|
|
warnx("invalid ccd name: %s", cp);
|
|
continue;
|
|
}
|
|
if ((error = pathtounit(ccd, &i)) != 0) {
|
|
warn("%s", ccd);
|
|
free(ccd);
|
|
continue;
|
|
}
|
|
if (i >= numccd) {
|
|
warnx("ccd%d not configured", i);
|
|
free(ccd);
|
|
continue;
|
|
}
|
|
if (cs[i].sc_flags & CCDF_INITED)
|
|
print_ccd_info(&cs[i], kd);
|
|
else
|
|
printf("# ccd%d not configured\n", i);
|
|
free(ccd);
|
|
}
|
|
}
|
|
|
|
free(cs);
|
|
|
|
done:
|
|
(void)kvm_close(kd);
|
|
return (0);
|
|
|
|
bad:
|
|
(void)kvm_close(kd);
|
|
return (1);
|
|
}
|
|
|
|
static void
|
|
print_ccd_info(struct ccd_softc *cs, kvm_t *kd)
|
|
{
|
|
static int header_printed = 0;
|
|
struct ccdcinfo *cip;
|
|
size_t readsize;
|
|
char path[MAXPATHLEN];
|
|
unsigned int i;
|
|
|
|
if (header_printed == 0 && verbose) {
|
|
printf("# ccd\t\tileave\tflags\tcompnent devices\n");
|
|
header_printed = 1;
|
|
}
|
|
|
|
readsize = cs->sc_nccdisks * sizeof(struct ccdcinfo);
|
|
if ((cip = malloc(readsize)) == NULL) {
|
|
warn("%s: can't allocate memory for component info",
|
|
cs->sc_xname);
|
|
return;
|
|
}
|
|
memset(cip, 0, readsize);
|
|
|
|
/* Dump out softc information. */
|
|
printf("%s\t\t%d\t%d\t", cs->sc_xname, cs->sc_ileave,
|
|
cs->sc_flags & CCDF_USERMASK);
|
|
fflush(stdout);
|
|
|
|
/* Read in the component info. */
|
|
if ((size_t)kvm_read(kd, (u_long)cs->sc_cinfo, (void *)cip,
|
|
readsize) != readsize) {
|
|
printf("\n");
|
|
warnx("can't read component info");
|
|
warnx("%s", kvm_geterr(kd));
|
|
goto done;
|
|
}
|
|
|
|
/* Read component pathname and display component info. */
|
|
for (i = 0; i < cs->sc_nccdisks; ++i) {
|
|
if ((size_t)kvm_read(kd, (u_long)cip[i].ci_path, (void *)path,
|
|
cip[i].ci_pathlen) != cip[i].ci_pathlen) {
|
|
printf("\n");
|
|
warnx("can't read component pathname");
|
|
warnx("%s", kvm_geterr(kd));
|
|
goto done;
|
|
}
|
|
fputs(path, stdout);
|
|
fputc((i + 1 < cs->sc_nccdisks) ? ' ' : '\n', stdout);
|
|
fflush(stdout);
|
|
}
|
|
|
|
done:
|
|
free(cip);
|
|
}
|
|
|
|
static int
|
|
flags_to_val(char *flags)
|
|
{
|
|
char *cp, *tok;
|
|
int i, tmp, val = ~CCDF_USERMASK;
|
|
size_t flagslen;
|
|
|
|
/*
|
|
* The most common case is that of NIL flags, so check for
|
|
* those first.
|
|
*/
|
|
if (strcmp("none", flags) == 0 || strcmp("0x0", flags) == 0 ||
|
|
strcmp("0", flags) == 0)
|
|
return (0);
|
|
|
|
flagslen = strlen(flags);
|
|
|
|
/* Check for values represented by strings. */
|
|
if ((cp = strdup(flags)) == NULL)
|
|
err(1, "no memory to parse flags");
|
|
tmp = 0;
|
|
for (tok = cp; (tok = strtok(tok, ",")) != NULL; tok = NULL) {
|
|
for (i = 0; flagvaltab[i].fv_flag != NULL; ++i)
|
|
if (strcmp(tok, flagvaltab[i].fv_flag) == 0)
|
|
break;
|
|
if (flagvaltab[i].fv_flag == NULL) {
|
|
free(cp);
|
|
goto bad_string;
|
|
}
|
|
tmp |= flagvaltab[i].fv_val;
|
|
}
|
|
|
|
/* If we get here, the string was ok. */
|
|
free(cp);
|
|
val = tmp;
|
|
goto out;
|
|
|
|
bad_string:
|
|
|
|
/* Check for values represented in hex. */
|
|
if (flagslen > 2 && flags[0] == '0' && flags[1] == 'x') {
|
|
errno = 0; /* to check for ERANGE */
|
|
val = (int)strtol(&flags[2], &cp, 16);
|
|
if ((errno == ERANGE) || (*cp != '\0'))
|
|
return (-1);
|
|
goto out;
|
|
}
|
|
|
|
/* Check for values represented in decimal. */
|
|
errno = 0; /* to check for ERANGE */
|
|
val = (int)strtol(flags, &cp, 10);
|
|
if ((errno == ERANGE) || (*cp != '\0'))
|
|
return (-1);
|
|
|
|
out:
|
|
return (((val & ~CCDF_USERMASK) == 0) ? val : -1);
|
|
}
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
const char *progname = getprogname();
|
|
|
|
fprintf(stderr, "usage: %s [-cv] ccd ileave [flags] dev [...]\n",
|
|
progname);
|
|
fprintf(stderr, " %s -C [-v] [-f config_file]\n", progname);
|
|
fprintf(stderr, " %s -u [-v] ccd [...]\n", progname);
|
|
fprintf(stderr, " %s -U [-v] [-f config_file]\n", progname);
|
|
fprintf(stderr, " %s -g [-M core] [-N system] [ccd [...]]\n",
|
|
progname);
|
|
exit(1);
|
|
}
|