0502f4560f
we may still have vn in the kernel but not be able to see it. This enables building -current SNAPS in a chroot on a -stable system
538 lines
11 KiB
C
538 lines
11 KiB
C
/*
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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. 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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* from: Utah $Hdr: vnconfig.c 1.1 93/12/15$
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*/
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)vnconfig.c 8.1 (Berkeley) 12/15/93";
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#endif
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static const char rcsid[] =
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"$Id: vnconfig.c,v 1.9 1999/03/14 09:20:01 julian Exp $";
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#endif /* not lint */
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#include <err.h>
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#include <errno.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 <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include <sys/module.h>
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#include <sys/stat.h>
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#include <sys/vnioctl.h>
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#include <ufs/ufs/ufsmount.h>
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#define MAXVNDISK 16
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#define LINESIZE 1024
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struct vndisk {
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char *dev;
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char *file;
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char *autolabel;
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int flags;
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int size;
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char *oarg;
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} vndisks[MAXVNDISK];
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#define VN_CONFIG 0x01
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#define VN_UNCONFIG 0x02
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#define VN_ENABLE 0x04
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#define VN_DISABLE 0x08
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#define VN_SWAP 0x10
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#define VN_MOUNTRO 0x20
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#define VN_MOUNTRW 0x40
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#define VN_IGNORE 0x80
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#define VN_SET 0x100
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#define VN_RESET 0x200
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int nvndisks;
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int all = 0;
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int verbose = 0;
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int global = 0;
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u_long setopt = 0;
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u_long resetopt = 0;
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char *configfile;
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int config __P((struct vndisk *));
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void getoptions __P((struct vndisk *, char *));
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char *rawdevice __P((char *));
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void readconfig __P((int));
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static void usage __P((void));
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static int getsize(const char *arg);
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static void do_autolabel(const char *dev, const char *label);
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int what_opt __P((char *, u_long *));
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int
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main(argc, argv)
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char **argv;
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{
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register int i, rv;
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int flags = 0;
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int size = 0;
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char *autolabel = NULL;
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configfile = _PATH_VNTAB;
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while ((i = getopt(argc, argv, "acdef:gr:s:S:L:uv")) != -1)
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switch (i) {
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/* all -- use config file */
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case 'a':
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all++;
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break;
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/* configure */
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case 'c':
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flags |= VN_CONFIG;
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flags &= ~VN_UNCONFIG;
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break;
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/* disable */
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case 'd':
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flags |= VN_DISABLE;
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flags &= ~VN_ENABLE;
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break;
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/* enable */
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case 'e':
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flags |= (VN_ENABLE|VN_CONFIG);
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flags &= ~(VN_DISABLE|VN_UNCONFIG);
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break;
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/* alternate config file */
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case 'f':
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configfile = optarg;
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break;
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/* fiddle global options */
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case 'g':
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global = 1 - global;
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break;
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/* reset options */
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case 'r':
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if (what_opt(optarg,&resetopt))
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errx(1, "invalid options '%s'", optarg);
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flags |= VN_RESET;
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break;
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/* set options */
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case 's':
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if (what_opt(optarg,&setopt))
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errx(1, "invalid options '%s'", optarg);
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flags |= VN_SET;
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break;
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/* unconfigure */
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case 'u':
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flags |= (VN_DISABLE|VN_UNCONFIG);
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flags &= ~(VN_ENABLE|VN_CONFIG);
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break;
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/* verbose */
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case 'v':
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verbose++;
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break;
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case 'S':
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size = getsize(optarg);
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break;
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case 'L':
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autolabel = optarg;
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break;
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default:
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usage();
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}
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if (modfind("vn") < 0)
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if (kldload("vn") < 0 || modfind("vn") < 0)
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warnx( "cannot find or load \"vn\" kernel module");
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if (flags == 0)
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flags = VN_CONFIG;
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if (all)
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readconfig(flags);
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else {
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if (argc < optind + 1)
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usage();
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vndisks[0].dev = argv[optind++];
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vndisks[0].file = argv[optind++];
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vndisks[0].flags = flags;
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vndisks[0].size = size;
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vndisks[0].autolabel = autolabel;
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if (optind < argc)
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getoptions(&vndisks[0], argv[optind]);
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nvndisks = 1;
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}
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rv = 0;
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for (i = 0; i < nvndisks; i++)
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rv += config(&vndisks[i]);
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exit(rv);
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}
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int
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what_opt(str,p)
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char *str;
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u_long *p;
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{
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if (!strcmp(str,"labels")) { *p |= VN_LABELS; return 0; }
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if (!strcmp(str,"follow")) { *p |= VN_FOLLOW; return 0; }
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if (!strcmp(str,"debug")) { *p |= VN_DEBUG; return 0; }
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if (!strcmp(str,"io")) { *p |= VN_IO; return 0; }
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if (!strcmp(str,"all")) { *p |= ~0; return 0; }
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if (!strcmp(str,"none")) { *p |= 0; return 0; }
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return 1;
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}
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int
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config(vnp)
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struct vndisk *vnp;
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{
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char *dev, *file, *oarg;
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int flags;
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struct vn_ioctl vnio;
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register int rv;
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char *rdev;
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FILE *f;
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u_long l;
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dev = vnp->dev;
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file = vnp->file;
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flags = vnp->flags;
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oarg = vnp->oarg;
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if (flags & VN_IGNORE)
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return(0);
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rdev = rawdevice(dev);
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f = fopen(rdev, "rw");
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if (f == NULL) {
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warn("open");
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return(1);
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}
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vnio.vn_file = file;
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vnio.vn_size = vnp->size; /* non-zero only if swap backed */
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/*
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* Disable the device
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*/
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if (flags & VN_DISABLE) {
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if (flags & (VN_MOUNTRO|VN_MOUNTRW)) {
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rv = unmount(oarg, 0);
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if (rv) {
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if (errno == EBUSY)
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flags &= ~VN_UNCONFIG;
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if ((flags & VN_UNCONFIG) == 0)
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warn("umount");
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} else if (verbose)
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printf("%s: unmounted\n", dev);
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}
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}
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/*
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* Clear (un-configure) the device
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*/
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if (flags & VN_UNCONFIG) {
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rv = ioctl(fileno(f), VNIOCDETACH, &vnio);
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if (rv) {
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if (errno == ENODEV) {
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if (verbose)
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printf("%s: not configured\n", dev);
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rv = 0;
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} else
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warn("VNIOCDETACH");
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} else if (verbose)
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printf("%s: cleared\n", dev);
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}
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/*
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* Configure the device
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*/
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if (flags & VN_CONFIG) {
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rv = ioctl(fileno(f), VNIOCATTACH, &vnio);
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if (rv) {
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warn("VNIOCATTACH");
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flags &= ~VN_ENABLE;
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} else {
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if (verbose) {
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printf(
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"%s: %d bytes on %s\n",
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dev, vnio.vn_size, file
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);
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}
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/*
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* autolabel
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*/
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if (vnp->autolabel) {
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do_autolabel(vnp->dev, vnp->autolabel);
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}
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}
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}
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/*
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* Set an option
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*/
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if (flags & VN_SET) {
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l = setopt;
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if (global)
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rv = ioctl(fileno(f), VNIOCGSET, &l);
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else
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rv = ioctl(fileno(f), VNIOCUSET, &l);
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if (rv) {
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warn("VNIO[GU]SET");
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} else if (verbose)
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printf("%s: flags now=%08x\n",dev,l);
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}
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/*
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* Reset an option
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*/
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if (flags & VN_RESET) {
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l = resetopt;
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if (global)
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rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
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else
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rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
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if (rv) {
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warn("VNIO[GU]CLEAR");
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} else if (verbose)
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printf("%s: flags now=%08x\n",dev,l);
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}
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/*
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* Enable special functions on the device
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*/
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if (flags & VN_ENABLE) {
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if (flags & VN_SWAP) {
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rv = swapon(dev);
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if (rv)
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warn("swapon");
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else if (verbose)
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printf("%s: swapping enabled\n", dev);
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}
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if (flags & (VN_MOUNTRO|VN_MOUNTRW)) {
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struct ufs_args args;
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int mflags;
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args.fspec = dev;
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mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0;
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rv = mount("ufs", oarg, mflags, &args);
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if (rv)
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warn("mount");
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else if (verbose)
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printf("%s: mounted on %s\n", dev, oarg);
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}
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}
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/* done: */
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fclose(f);
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fflush(stdout);
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return(rv < 0);
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}
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#define EOL(c) ((c) == '\0' || (c) == '\n')
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#define WHITE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n')
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void
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readconfig(flags)
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int flags;
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{
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char buf[LINESIZE];
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FILE *f;
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register char *cp, *sp;
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register int ix;
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f = fopen(configfile, "r");
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if (f == NULL)
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err(1, "%s", configfile);
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ix = 0;
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while (fgets(buf, LINESIZE, f) != NULL) {
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cp = buf;
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if (*cp == '#')
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continue;
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while (!EOL(*cp) && WHITE(*cp))
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cp++;
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if (EOL(*cp))
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continue;
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sp = cp;
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while (!EOL(*cp) && !WHITE(*cp))
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cp++;
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if (EOL(*cp))
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continue;
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*cp++ = '\0';
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vndisks[ix].dev = malloc(cp - sp);
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strcpy(vndisks[ix].dev, sp);
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while (!EOL(*cp) && WHITE(*cp))
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cp++;
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if (EOL(*cp))
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continue;
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sp = cp;
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while (!EOL(*cp) && !WHITE(*cp))
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cp++;
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*cp++ = '\0';
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if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) {
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vndisks[ix].size = getsize(sp + 1);
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} else {
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vndisks[ix].file = malloc(cp - sp);
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strcpy(vndisks[ix].file, sp);
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}
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while (!EOL(*cp) && WHITE(*cp))
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cp++;
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vndisks[ix].flags = flags;
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if (!EOL(*cp)) {
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sp = cp;
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while (!EOL(*cp) && !WHITE(*cp))
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cp++;
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*cp++ = '\0';
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getoptions(&vndisks[ix], sp);
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}
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nvndisks++;
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ix++;
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}
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}
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void
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getoptions(vnp, fstr)
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struct vndisk *vnp;
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char *fstr;
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{
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int flags = 0;
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char *oarg = NULL;
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if (strcmp(fstr, "swap") == 0)
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flags |= VN_SWAP;
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else if (strncmp(fstr, "mount=", 6) == 0) {
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flags |= VN_MOUNTRW;
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oarg = &fstr[6];
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} else if (strncmp(fstr, "mountrw=", 8) == 0) {
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flags |= VN_MOUNTRW;
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oarg = &fstr[8];
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} else if (strncmp(fstr, "mountro=", 8) == 0) {
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flags |= VN_MOUNTRO;
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oarg = &fstr[8];
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} else if (strcmp(fstr, "ignore") == 0)
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flags |= VN_IGNORE;
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vnp->flags |= flags;
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if (oarg) {
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vnp->oarg = malloc(strlen(oarg) + 1);
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strcpy(vnp->oarg, oarg);
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} else
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vnp->oarg = NULL;
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}
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char *
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rawdevice(dev)
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char *dev;
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{
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register char *rawbuf, *dp, *ep;
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struct stat sb;
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int len;
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len = strlen(dev);
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rawbuf = malloc(len + 2);
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strcpy(rawbuf, dev);
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if (stat(rawbuf, &sb) != 0 || !S_ISCHR(sb.st_mode)) {
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dp = rindex(rawbuf, '/');
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if (dp) {
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for (ep = &rawbuf[len]; ep > dp; --ep)
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*(ep+1) = *ep;
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*++ep = 'r';
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}
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}
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return (rawbuf);
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}
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static void
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usage()
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{
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fprintf(stderr,
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"usage: vnconfig [-acdefguv] [-s option] [-r option] [special-device file]\n");
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exit(1);
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}
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static int
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getsize(const char *arg)
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{
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char *ptr;
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int pgsize = getpagesize();
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quad_t size = strtoq(arg, &ptr, 0);
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switch(tolower(*ptr)) {
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case 't':
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/*
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* GULP! Terrabytes. It's actually possible to create
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* a 7.9 TB VN device, though newfs can't handle any single
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* filesystem larger then 1 TB.
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*/
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size *= 1024;
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/* fall through */
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case 'g':
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size *= 1024;
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/* fall through */
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default:
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case 'm':
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size *= 1024;
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/* fall through */
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case 'k':
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size *= 1024;
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/* fall through */
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case 'c':
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break;
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}
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size = (size + pgsize - 1) / pgsize;
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return((int)size);
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}
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/*
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* DO_AUTOLABEL
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*
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* Automatically label the device. This will wipe any preexisting
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* label.
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*/
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static void
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do_autolabel(const char *dev, const char *label)
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{
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/* XXX not yet implemented */
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fprintf(stderr, "autolabel not yet implemented, sorry\n");
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exit(1);
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}
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