[dragonfly.git] / usr.sbin / vnconfig / vnconfig.c

/*
 * Copyright (c) 1993 University of Utah.
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Utah $Hdr: vnconfig.c 1.1 93/12/15$
 *
 * @(#)vnconfig.c	8.1 (Berkeley) 12/15/93
 * $FreeBSD: src/usr.sbin/vnconfig/vnconfig.c,v 1.13.2.7 2003/06/02 09:10:27 maxim Exp $
 * $DragonFly: src/usr.sbin/vnconfig/vnconfig.c,v 1.15 2008/07/27 22:36:01 thomas Exp $
 */

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/linker.h>
#include <sys/mount.h>
#include <sys/module.h>
#include <sys/stat.h>
#include <sys/vnioctl.h>
#include <vfs/ufs/ufsmount.h>

#define LINESIZE	1024
#define ZBUFSIZE	32768

struct vndisk {
	char	*dev;
	char	*file;
	char	*autolabel;
	int	flags;
	int64_t	size;
	char	*oarg;
} *vndisks;

#define VN_CONFIG	0x01
#define VN_UNCONFIG	0x02
#define VN_ENABLE	0x04
#define VN_DISABLE	0x08
#define	VN_SWAP		0x10
#define VN_MOUNTRO	0x20
#define VN_MOUNTRW	0x40
#define VN_IGNORE	0x80
#define VN_SET		0x100
#define VN_RESET	0x200
#define VN_TRUNCATE	0x400
#define VN_ZERO		0x800

int nvndisks;

int all = 0;
int verbose = 0;
int global = 0;
int listopt = 0;
u_long setopt = 0;
u_long resetopt = 0;
char *configfile;

int config(struct vndisk *);
void getoptions(struct vndisk *, const char *);
int getinfo(const char *vname);
char *rawdevice(const char *);
void readconfig(int);
static void usage(void);
static int64_t getsize(const char *arg);
static void do_autolabel(const char *dev, const char *label);
int what_opt(const char *, u_long *);

int
main(int argc, char *argv[])
{
	int i, rv;
	int flags = 0;
	int64_t size = 0;
	char *autolabel = NULL;
	char *s;

	configfile = _PATH_VNTAB;
	while ((i = getopt(argc, argv, "acdef:glr:s:S:TZL:uv")) != -1)
		switch (i) {

		/* all -- use config file */
		case 'a':
			all++;
			break;

		/* configure */
		case 'c':
			flags |= VN_CONFIG;
			flags &= ~VN_UNCONFIG;
			break;

		/* disable */
		case 'd':
			flags |= VN_DISABLE;
			flags &= ~VN_ENABLE;
			break;

		/* enable */
		case 'e':
			flags |= (VN_ENABLE|VN_CONFIG);
			flags &= ~(VN_DISABLE|VN_UNCONFIG);
			break;

		/* alternate config file */
		case 'f':
			configfile = optarg;
			break;

		/* fiddle global options */
		case 'g':
			global = 1 - global;
			break;

		/* reset options */
		case 'r':
			for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) {
				if (what_opt(s, &resetopt))
					errx(1, "invalid options '%s'", s);
			}
			flags |= VN_RESET;
			break;

		case 'l':
			listopt = 1;
			break;

		/* set options */
		case 's':
			for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) {
				if (what_opt(s, &setopt))
					errx(1, "invalid options '%s'", s);
			}
			flags |= VN_SET;
			break;

		/* unconfigure */
		case 'u':
			flags |= (VN_DISABLE|VN_UNCONFIG);
			flags &= ~(VN_ENABLE|VN_CONFIG);
			break;

		/* verbose */
		case 'v':
			verbose++;
			break;

		case 'S':
			size = getsize(optarg);
			flags |= VN_CONFIG;
			flags &= ~VN_UNCONFIG;
			break;

		case 'T':
			flags |= VN_TRUNCATE;
			break;

		case 'Z':
			flags |= VN_ZERO;
			break;

		case 'L':
			autolabel = optarg;
			break;

		default:
			usage();
		}

	if (modfind("vn") < 0)
		if (kldload("vn") < 0 || modfind("vn") < 0)
			warnx( "cannot find or load \"vn\" kernel module");

	if (listopt) {
		if(argc > optind)
			while(argc > optind) 
				rv += getinfo( argv[optind++]);
		else {
			rv = getinfo( NULL );
		}
		exit(rv);
	}

	if (flags == 0)
		flags = VN_CONFIG;
	if (all) {
		readconfig(flags);
	} else {
		vndisks = calloc(sizeof(struct vndisk), 1);
		if (argc < optind + 1)
			usage();
		vndisks[0].dev = argv[optind++];
		vndisks[0].file = argv[optind++];	/* may be NULL */
		vndisks[0].flags = flags;
		vndisks[0].size = size;
		vndisks[0].autolabel = autolabel;
		if (optind < argc)
			getoptions(&vndisks[0], argv[optind]);
		nvndisks = 1;
	}
	rv = 0;
	for (i = 0; i < nvndisks; i++)
		rv += config(&vndisks[i]);
	exit(rv);
}

int
what_opt(const char *str, u_long *p)
{
	if (!strcmp(str,"reserve")) { *p |= VN_RESERVE; return 0; }
	if (!strcmp(str,"labels")) { *p |= VN_LABELS; return 0; }
	if (!strcmp(str,"follow")) { *p |= VN_FOLLOW; return 0; }
	if (!strcmp(str,"debug")) { *p |= VN_DEBUG; return 0; }
	if (!strcmp(str,"io")) { *p |= VN_IO; return 0; }
	if (!strcmp(str,"all")) { *p |= ~0; return 0; }
	if (!strcmp(str,"none")) { *p |= 0; return 0; }
	return 1;
}

/*
 *
 * GETINFO
 *
 *	Print vnode disk information to stdout for the device at
 *	path 'vname', or all existing 'vn' devices if none is given. 
 *	Any 'vn' devices must exist under /dev in order to be queried.
 *
 *	Todo: correctly use vm_secsize for swap-backed vn's ..
 */

int
getinfo( const char *vname )
{
	int i, vd, printlim = 0;
	char vnpath[PATH_MAX], *tmp;

	struct vn_user vnu;
	struct stat sb;

	if (vname == NULL) {
		i = 0;
		printlim = 1024;
	}
	else {
		tmp = (char *) vname;
		while (*tmp != 0) {
			if(isdigit(*tmp)){
				i = atoi(tmp);
				printlim = i + 1;
				break;
			}
			tmp++;
		}
		if (tmp == NULL) {
			printf("unknown vn device: %s", vname);
			return 1;
		}
	}

	snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", i);

	vd = open(vnpath, O_RDONLY);
	if (vd < 0) {
		err(1, "open: %s", vnpath);
		return 1;
	}

	for (i; i<printlim; i++) {

		bzero((void *) &vnpath, sizeof(vnpath));
		bzero((void *) &sb, sizeof(struct stat));
		bzero((void *) &vnu, sizeof(struct vn_user));

		vnu.vnu_unit = i;

		snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", vnu.vnu_unit);

		if(stat(vnpath, &sb) < 0) {
			break;
		}
		else {
        		if (ioctl(vd, VNIOCGET, &vnu) == -1) {
				if (errno != ENXIO) {
					if (*vnu.vnu_file == '\0') {
						fprintf(stdout,
						    "vn%d: ioctl: can't access regular file\n",
						    vnu.vnu_unit);
						continue;
					}
					else {
						err(1, "ioctl: %s", vname);
						close(vd);
						return 1;
					}
				}
        		}

			fprintf(stdout, "vn%d: ", vnu.vnu_unit);

			if (vnu.vnu_file[0] == 0)
				fprintf(stdout, "not in use\n");
			else if ((strcmp(vnu.vnu_file, _VN_USER_SWAP)) == 0)
				fprintf(stdout,
					"consuming %d VM pages\n",
					vnu.vnu_size);
			else
				fprintf(stdout, 
					"covering %s on %s, inode %ju\n",
					vnu.vnu_file,
					devname(vnu.vnu_dev, S_IFBLK), 
					(uintmax_t)vnu.vnu_ino);
		}
	}
	close(vd);
	return 0;
}

int
config(struct vndisk *vnp)
{
	char *dev, *file, *rdev, *oarg;
	FILE *f;
	struct vn_ioctl vnio;
	int flags, pgsize, rv, status;
	u_long l;
	
	pgsize = getpagesize();

	status = rv = 0;

	/*
	 * Prepend "/dev/" to the specified device name, if necessary.
	 * Operate on vnp->dev because it is used later.
	 */
	if (vnp->dev[0] != '/' && vnp->dev[0] != '.')
		asprintf(&vnp->dev, "%s%s", _PATH_DEV, vnp->dev);
	dev = vnp->dev;
	file = vnp->file;
	flags = vnp->flags;
	oarg = vnp->oarg;

	if (flags & VN_IGNORE)
		return(0);

	/*
	 * When a regular file has been specified, do any requested setup
	 * of the file.  Truncation (also creates the file if necessary),
	 * sizing, and zeroing.
	 */

	if (file && vnp->size != 0 && (flags & VN_CONFIG)) {
		int  fd;
		struct stat st;

		if (flags & VN_TRUNCATE)
			fd = open(file, O_RDWR|O_CREAT|O_TRUNC, 0600);
		else
			fd = open(file, O_RDWR);
		if (fd >= 0 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
			if (st.st_size < vnp->size * pgsize)
				ftruncate(fd, vnp->size * pgsize);
			if (vnp->size != 0)
				st.st_size = vnp->size * pgsize;

			if (flags & VN_ZERO) {
				char *buf = malloc(ZBUFSIZE);
				bzero(buf, ZBUFSIZE);
				while (st.st_size > 0) {
					int n = (st.st_size > ZBUFSIZE) ?
					    ZBUFSIZE : (int)st.st_size;
					if (write(fd, buf, n) != n) {
						ftruncate(fd, 0);
						printf("Unable to ZERO file %s\n", file);
						return(0);
					}
					st.st_size -= (off_t)n;
				}
			}
			close(fd);
		} else {
			printf("Unable to open file %s\n", file);
			return(0);
		}
	} else if (file == NULL && vnp->size == 0 && (flags & VN_CONFIG)) {
		warnx("specify regular filename or swap size");
		return (0);
	}

	rdev = rawdevice(dev);
	f = fopen(rdev, "rw");
	if (f == NULL) {
		warn("%s", dev);
		return(1);
	}
	vnio.vn_file = file;
	vnio.vn_size = vnp->size;	/* non-zero only if swap backed */

	/*
	 * Disable the device
	 */
	if (flags & VN_DISABLE) {
		if (flags & (VN_MOUNTRO|VN_MOUNTRW)) {
			rv = unmount(oarg, 0);
			if (rv) {
				status--;
				if (errno == EBUSY)
					flags &= ~VN_UNCONFIG;
				if ((flags & VN_UNCONFIG) == 0)
					warn("umount");
			} else if (verbose)
				printf("%s: unmounted\n", dev);
		}
	}
	/*
	 * Clear (un-configure) the device
	 */
	if (flags & VN_UNCONFIG) {
		rv = ioctl(fileno(f), VNIOCDETACH, &vnio);
		if (rv) {
			if (errno == ENODEV) {
				if (verbose)
					printf("%s: not configured\n", dev);
				rv = 0;
			} else {
				status--;
				warn("VNIOCDETACH");
			}
		} else if (verbose)
			printf("%s: cleared\n", dev);
	}
	/*
	 * Set specified options
	 */
	if (flags & VN_SET) {
		l = setopt;
		if (global)
			rv = ioctl(fileno(f), VNIOCGSET, &l);
		else
			rv = ioctl(fileno(f), VNIOCUSET, &l);
		if (rv) {
			status--;
			warn("VNIO[GU]SET");
		} else if (verbose)
			printf("%s: flags now=%08x\n",dev,l);
	}
	/*
	 * Reset specified options
	 */
	if (flags & VN_RESET) {
		l = resetopt;
		if (global)
			rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
		else
			rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
		if (rv) {
			status--;
			warn("VNIO[GU]CLEAR");
		} else if (verbose)
			printf("%s: flags now=%08x\n",dev,l);
	}
	/*
	 * Configure the device
	 */
	if (flags & VN_CONFIG) {
		rv = ioctl(fileno(f), VNIOCATTACH, &vnio);
		if (rv) {
			status--;
			warn("VNIOCATTACH");
			flags &= ~VN_ENABLE;
		} else {
			if (verbose) {
				printf("%s: %s, ", dev, file);
				if (vnp->size != 0) {
				    printf("%lld bytes mapped\n", vnio.vn_size);
				} else {
				    printf("complete file mapped\n");
				}
			}
			/*
			 * autolabel
			 */
			if (vnp->autolabel) {
				do_autolabel(vnp->dev, vnp->autolabel);
			}
		}
	}
	/*
	 * Set an option
	 */
	if (flags & VN_SET) {
		l = setopt;
		if (global)
			rv = ioctl(fileno(f), VNIOCGSET, &l);
		else
			rv = ioctl(fileno(f), VNIOCUSET, &l);
		if (rv) {
			status--;
			warn("VNIO[GU]SET");
		} else if (verbose)
			printf("%s: flags now=%08lx\n",dev,l);
	}
	/*
	 * Reset an option
	 */
	if (flags & VN_RESET) {
		l = resetopt;
		if (global)
			rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
		else
			rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
		if (rv) {
			status--;
			warn("VNIO[GU]CLEAR");
		} else if (verbose)
			printf("%s: flags now=%08lx\n",dev,l);
	}

	/*
	 * Close the device now, as we may want to mount it.
	 */
	fclose(f);

	/*
	 * Enable special functions on the device
	 */
	if (flags & VN_ENABLE) {
		if (flags & VN_SWAP) {
			rv = swapon(dev);
			if (rv) {
				status--;
				warn("swapon");
			}
			else if (verbose)
				printf("%s: swapping enabled\n", dev);
		}
		if (flags & (VN_MOUNTRO|VN_MOUNTRW)) {
			struct ufs_args args;
			int mflags;

			args.fspec = dev;
			mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0;
			rv = mount("ufs", oarg, mflags, &args);
			if (rv) {
				status--;
				warn("mount");
			}
			else if (verbose)
				printf("%s: mounted on %s\n", dev, oarg);
		}
	}
/* done: */
	fflush(stdout);
	return(status < 0);
}

#define EOL(c)		((c) == '\0' || (c) == '\n')
#define WHITE(c)	((c) == ' ' || (c) == '\t' || (c) == '\n')

void
readconfig(int flags)
{
	char buf[LINESIZE];
	FILE *f;
	char *cp, *sp;
	int ix;
	int ax;

	f = fopen(configfile, "r");
	if (f == NULL)
		err(1, "%s", configfile);
	ix = 0;		/* number of elements */
	ax = 0;		/* allocated elements */
	while (fgets(buf, LINESIZE, f) != NULL) {
		cp = buf;
		if (*cp == '#')
			continue;
		while (!EOL(*cp) && WHITE(*cp))
			cp++;
		if (EOL(*cp))
			continue;
		sp = cp;
		while (!EOL(*cp) && !WHITE(*cp))
			cp++;
		if (EOL(*cp))
			continue;
		*cp++ = '\0';

		if (ix == ax) {
			ax = ax + 16;
			vndisks = realloc(vndisks, ax * sizeof(struct vndisk));
			bzero(&vndisks[ix], (ax - ix) * sizeof(struct vndisk));
		}
		vndisks[ix].dev = malloc(cp - sp);
		strcpy(vndisks[ix].dev, sp);
		while (!EOL(*cp) && WHITE(*cp))
			cp++;
		if (EOL(*cp))
			continue;
		sp = cp;
		while (!EOL(*cp) && !WHITE(*cp))
			cp++;
		*cp++ = '\0';

		if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) {
			vndisks[ix].size = getsize(sp + 1);
		} else {
			vndisks[ix].file = malloc(cp - sp);
			strcpy(vndisks[ix].file, sp);
		}

		while (!EOL(*cp) && WHITE(*cp))
			cp++;
		vndisks[ix].flags = flags;
		if (!EOL(*cp)) {
			sp = cp;
			while (!EOL(*cp) && !WHITE(*cp))
				cp++;
			*cp++ = '\0';
			getoptions(&vndisks[ix], sp);
		}
		nvndisks++;
		ix++;
	}
}

void
getoptions(struct vndisk *vnp, const char *fstr)
{
	int flags = 0;
	const char *oarg = NULL;

	if (strcmp(fstr, "swap") == 0)
		flags |= VN_SWAP;
	else if (strncmp(fstr, "mount=", 6) == 0) {
		flags |= VN_MOUNTRW;
		oarg = &fstr[6];
	} else if (strncmp(fstr, "mountrw=", 8) == 0) {
		flags |= VN_MOUNTRW;
		oarg = &fstr[8];
	} else if (strncmp(fstr, "mountro=", 8) == 0) {
		flags |= VN_MOUNTRO;
		oarg = &fstr[8];
	} else if (strcmp(fstr, "ignore") == 0)
		flags |= VN_IGNORE;
	vnp->flags |= flags;
	if (oarg) {
		vnp->oarg = malloc(strlen(oarg) + 1);
		strcpy(vnp->oarg, oarg);
	} else
		vnp->oarg = NULL;
}

char *
rawdevice(const char *dev)
{
	char *rawbuf, *dp, *ep;
	struct stat sb;
	int len;

	len = strlen(dev);
	rawbuf = malloc(len + 2);
	strcpy(rawbuf, dev);
	if (stat(rawbuf, &sb) != 0 || !S_ISCHR(sb.st_mode)) {
		dp = strrchr(rawbuf, '/');
		if (dp) {
			for (ep = &rawbuf[len]; ep > dp; --ep)
				*(ep+1) = *ep;
			*++ep = 'r';
		}
	}
	return (rawbuf);
}

static void
usage(void)
{
	fprintf(stderr, "%s\n%s\n%s\n%s\n",
		"usage: vnconfig [-cdeguvTZ] [-s options] [-r options]",
		"                [-S value] special_file [regular_file] [feature]",
		"       vnconfig -a [-cdeguv] [-s options] [-r options] [-f config_file]",
		"       vnconfig -l [special_file ...]");
	exit(1);
}

static int64_t
getsize(const char *arg)
{
	char *ptr;
	int pgsize = getpagesize();
	int64_t size = strtoq(arg, &ptr, 0);

	switch(tolower(*ptr)) {
	case 't':
		/*
		 * GULP!  Terabytes.  It's actually possible to create
		 * a 7.9 TB VN device, though newfs can't handle any single
		 * filesystem larger then 1 TB.
		 */
		size *= 1024;
		/* fall through */
	case 'g':
		size *= 1024;
		/* fall through */
	default:
	case 'm':
		size *= 1024;
		/* fall through */
	case 'k':
		size *= 1024;
		/* fall through */
	case 'c':
		break;
	}
	size = (size + pgsize - 1) / pgsize;
	return(size);
}

/*
 * DO_AUTOLABEL
 *
 *	Automatically label the device.  This will wipe any preexisting
 *	label.
 */

static void
do_autolabel(const char *dev, const char *label)
{
	/* XXX not yet implemented */
	fprintf(stderr, "autolabel not yet implemented, sorry\n");
	exit(1);
}
Commit	Line	Data
984263bc MD	1	/*
	2	* Copyright (c) 1993 University of Utah.
	3	* Copyright (c) 1990, 1993
	4	* The Regents of the University of California. All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* the Systems Programming Group of the University of Utah Computer
	8	* Science Department.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	36	* SUCH DAMAGE.
	37	*
	38	* from: Utah $Hdr: vnconfig.c 1.1 93/12/15$
1de703da MD	39	*
	40	* @(#)vnconfig.c 8.1 (Berkeley) 12/15/93
	41	* $FreeBSD: src/usr.sbin/vnconfig/vnconfig.c,v 1.13.2.7 2003/06/02 09:10:27 maxim Exp $
daa51328	42	* $DragonFly: src/usr.sbin/vnconfig/vnconfig.c,v 1.15 2008/07/27 22:36:01 thomas Exp $
984263bc MD	43	*/
984263bc MD	44
984263bc MD	45	#include <ctype.h>
	46	#include <err.h>
	47	#include <errno.h>
	48	#include <paths.h>
	49	#include <stdio.h>
	50	#include <stdlib.h>
	51	#include <fcntl.h>
	52	#include <string.h>
	53	#include <unistd.h>
	54	#include <sys/param.h>
	55	#include <sys/ioctl.h>
	56	#include <sys/linker.h>
	57	#include <sys/mount.h>
	58	#include <sys/module.h>
	59	#include <sys/stat.h>
	60	#include <sys/vnioctl.h>
38a690d7	61	#include <vfs/ufs/ufsmount.h>
984263bc MD	62
	63	#define LINESIZE 1024
	64	#define ZBUFSIZE 32768
	65
	66	struct vndisk {
	67	char *dev;
	68	char *file;
	69	char *autolabel;
	70	int flags;
57fec106	71	int64_t size;
984263bc MD	72	char *oarg;
	73	} *vndisks;
	74
	75	#define VN_CONFIG 0x01
	76	#define VN_UNCONFIG 0x02
	77	#define VN_ENABLE 0x04
	78	#define VN_DISABLE 0x08
	79	#define VN_SWAP 0x10
	80	#define VN_MOUNTRO 0x20
	81	#define VN_MOUNTRW 0x40
	82	#define VN_IGNORE 0x80
	83	#define VN_SET 0x100
	84	#define VN_RESET 0x200
	85	#define VN_TRUNCATE 0x400
	86	#define VN_ZERO 0x800
	87
	88	int nvndisks;
	89
	90	int all = 0;
	91	int verbose = 0;
	92	int global = 0;
30c1fde0	93	int listopt = 0;
984263bc MD	94	u_long setopt = 0;
	95	u_long resetopt = 0;
	96	char *configfile;
	97
2d8a3be7	98	int config(struct vndisk *);
acc9b5f2	99	void getoptions(struct vndisk , const char );
30c1fde0	100	int getinfo(const char *vname);
acc9b5f2	101	char rawdevice(const char );
2d8a3be7 EN	102	void readconfig(int);
2d8a3be7 EN	103	static void usage(void);
57fec106	104	static int64_t getsize(const char *arg);
984263bc	105	static void do_autolabel(const char dev, const char label);
acc9b5f2	106	int what_opt(const char , u_long );
984263bc MD	107
984263bc MD	108	int
cf287f0a	109	main(int argc, char *argv[])
984263bc	110	{
cf287f0a	111	int i, rv;
984263bc	112	int flags = 0;
57fec106	113	int64_t size = 0;
984263bc MD	114	char *autolabel = NULL;
	115	char *s;
	116
	117	configfile = _PATH_VNTAB;
30c1fde0	118	while ((i = getopt(argc, argv, "acdef:glr:s:S:TZL:uv")) != -1)
984263bc MD	119	switch (i) {
	120
	121	/* all -- use config file */
	122	case 'a':
	123	all++;
	124	break;
	125
	126	/* configure */
	127	case 'c':
	128	flags \|= VN_CONFIG;
	129	flags &= ~VN_UNCONFIG;
	130	break;
	131
	132	/* disable */
	133	case 'd':
	134	flags \|= VN_DISABLE;
	135	flags &= ~VN_ENABLE;
	136	break;
	137
	138	/* enable */
	139	case 'e':
	140	flags \|= (VN_ENABLE\|VN_CONFIG);
	141	flags &= ~(VN_DISABLE\|VN_UNCONFIG);
	142	break;
	143
	144	/* alternate config file */
	145	case 'f':
	146	configfile = optarg;
	147	break;
	148
	149	/* fiddle global options */
	150	case 'g':
	151	global = 1 - global;
	152	break;
	153
	154	/* reset options */
	155	case 'r':
	156	for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) {
	157	if (what_opt(s, &resetopt))
	158	errx(1, "invalid options '%s'", s);
	159	}
	160	flags \|= VN_RESET;
	161	break;
	162
30c1fde0 CT	163	case 'l':
	164	listopt = 1;
	165	break;
	166
984263bc MD	167	/* set options */
	168	case 's':
	169	for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) {
	170	if (what_opt(s, &setopt))
	171	errx(1, "invalid options '%s'", s);
	172	}
	173	flags \|= VN_SET;
	174	break;
	175
	176	/* unconfigure */
	177	case 'u':
	178	flags \|= (VN_DISABLE\|VN_UNCONFIG);
	179	flags &= ~(VN_ENABLE\|VN_CONFIG);
	180	break;
	181
	182	/* verbose */
	183	case 'v':
	184	verbose++;
	185	break;
	186
	187	case 'S':
	188	size = getsize(optarg);
	189	flags \|= VN_CONFIG;
	190	flags &= ~VN_UNCONFIG;
	191	break;
	192
	193	case 'T':
	194	flags \|= VN_TRUNCATE;
	195	break;
	196
	197	case 'Z':
	198	flags \|= VN_ZERO;
	199	break;
	200
	201	case 'L':
	202	autolabel = optarg;
	203	break;
	204
	205	default:
	206	usage();
	207	}
	208
	209	if (modfind("vn") < 0)
	210	if (kldload("vn") < 0 \|\| modfind("vn") < 0)
	211	warnx( "cannot find or load \"vn\" kernel module");
	212
30c1fde0 CT	213	if (listopt) {
	214	if(argc > optind)
	215	while(argc > optind)
	216	rv += getinfo( argv[optind++]);
	217	else {
	218	rv = getinfo( NULL );
	219	}
	220	exit(rv);
	221	}
	222
984263bc MD	223	if (flags == 0)
	224	flags = VN_CONFIG;
	225	if (all) {
	226	readconfig(flags);
	227	} else {
	228	vndisks = calloc(sizeof(struct vndisk), 1);
	229	if (argc < optind + 1)
	230	usage();
	231	vndisks[0].dev = argv[optind++];
	232	vndisks[0].file = argv[optind++]; /* may be NULL */
	233	vndisks[0].flags = flags;
	234	vndisks[0].size = size;
	235	vndisks[0].autolabel = autolabel;
	236	if (optind < argc)
	237	getoptions(&vndisks[0], argv[optind]);
	238	nvndisks = 1;
	239	}
	240	rv = 0;
	241	for (i = 0; i < nvndisks; i++)
	242	rv += config(&vndisks[i]);
	243	exit(rv);
	244	}
	245
	246	int
acc9b5f2	247	what_opt(const char str, u_long p)
984263bc MD	248	{
	249	if (!strcmp(str,"reserve")) { *p \|= VN_RESERVE; return 0; }
	250	if (!strcmp(str,"labels")) { *p \|= VN_LABELS; return 0; }
	251	if (!strcmp(str,"follow")) { *p \|= VN_FOLLOW; return 0; }
	252	if (!strcmp(str,"debug")) { *p \|= VN_DEBUG; return 0; }
	253	if (!strcmp(str,"io")) { *p \|= VN_IO; return 0; }
	254	if (!strcmp(str,"all")) { *p \|= ~0; return 0; }
	255	if (!strcmp(str,"none")) { *p \|= 0; return 0; }
	256	return 1;
	257	}
	258
30c1fde0 CT	259	/*
	260	*
	261	* GETINFO
	262	*
	263	* Print vnode disk information to stdout for the device at
	264	* path 'vname', or all existing 'vn' devices if none is given.
	265	* Any 'vn' devices must exist under /dev in order to be queried.
	266	*
	267	* Todo: correctly use vm_secsize for swap-backed vn's ..
	268	*/
	269
	270	int
	271	getinfo( const char *vname )
	272	{
	273	int i, vd, printlim = 0;
	274	char vnpath[PATH_MAX], *tmp;
	275
	276	struct vn_user vnu;
	277	struct stat sb;
	278
	279	if (vname == NULL) {
	280	i = 0;
	281	printlim = 1024;
	282	}
	283	else {
	284	tmp = (char *) vname;
201b3f37	285	while (*tmp != 0) {
30c1fde0 CT	286	if(isdigit(*tmp)){
	287	i = atoi(tmp);
	288	printlim = i + 1;
	289	break;
	290	}
	291	tmp++;
	292	}
	293	if (tmp == NULL) {
	294	printf("unknown vn device: %s", vname);
	295	return 1;
	296	}
	297	}
	298
	299	snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", i);
	300
acc9b5f2	301	vd = open(vnpath, O_RDONLY);
30c1fde0 CT	302	if (vd < 0) {
	303	err(1, "open: %s", vnpath);
	304	return 1;
	305	}
	306
	307	for (i; i<printlim; i++) {
	308
	309	bzero((void *) &vnpath, sizeof(vnpath));
	310	bzero((void *) &sb, sizeof(struct stat));
	311	bzero((void *) &vnu, sizeof(struct vn_user));
	312
	313	vnu.vnu_unit = i;
	314
	315	snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", vnu.vnu_unit);
	316
acc9b5f2	317	if(stat(vnpath, &sb) < 0) {
30c1fde0	318	break;
acc9b5f2	319	}
30c1fde0 CT	320	else {
	321	if (ioctl(vd, VNIOCGET, &vnu) == -1) {
	322	if (errno != ENXIO) {
2ddea4d5 SK	323	if (*vnu.vnu_file == '\0') {
	324	fprintf(stdout,
	325	"vn%d: ioctl: can't access regular file\n",
	326	vnu.vnu_unit);
	327	continue;
	328	}
	329	else {
	330	err(1, "ioctl: %s", vname);
	331	close(vd);
	332	return 1;
	333	}
30c1fde0 CT	334	}
	335	}
	336
	337	fprintf(stdout, "vn%d: ", vnu.vnu_unit);
	338
	339	if (vnu.vnu_file[0] == 0)
	340	fprintf(stdout, "not in use\n");
	341	else if ((strcmp(vnu.vnu_file, _VN_USER_SWAP)) == 0)
	342	fprintf(stdout,
	343	"consuming %d VM pages\n",
	344	vnu.vnu_size);
	345	else
	346	fprintf(stdout,
0656dd4c	347	"covering %s on %s, inode %ju\n",
30c1fde0 CT	348	vnu.vnu_file,
30c1fde0 CT	349	devname(vnu.vnu_dev, S_IFBLK),
0656dd4c	350	(uintmax_t)vnu.vnu_ino);
30c1fde0 CT	351	}
	352	}
	353	close(vd);
	354	return 0;
	355	}
	356
984263bc	357	int
cf287f0a	358	config(struct vndisk *vnp)
984263bc	359	{
66950a15	360	char dev, file, rdev, oarg;
984263bc	361	FILE *f;
66950a15 HP	362	struct vn_ioctl vnio;
66950a15 HP	363	int flags, pgsize, rv, status;
984263bc	364	u_long l;
66950a15 HP	365
66950a15 HP	366	pgsize = getpagesize();
984263bc MD	367
	368	status = rv = 0;
	369
	370	/*
	371	* Prepend "/dev/" to the specified device name, if necessary.
	372	* Operate on vnp->dev because it is used later.
	373	*/
	374	if (vnp->dev[0] != '/' && vnp->dev[0] != '.')
71126e33	375	asprintf(&vnp->dev, "%s%s", _PATH_DEV, vnp->dev);
984263bc MD	376	dev = vnp->dev;
	377	file = vnp->file;
	378	flags = vnp->flags;
	379	oarg = vnp->oarg;
	380
	381	if (flags & VN_IGNORE)
	382	return(0);
	383
	384	/*
	385	* When a regular file has been specified, do any requested setup
	386	* of the file. Truncation (also creates the file if necessary),
	387	* sizing, and zeroing.
	388	*/
	389
	390	if (file && vnp->size != 0 && (flags & VN_CONFIG)) {
	391	int fd;
	392	struct stat st;
	393
	394	if (flags & VN_TRUNCATE)
c7daadb1	395	fd = open(file, O_RDWR\|O_CREAT\|O_TRUNC, 0600);
984263bc MD	396	else
	397	fd = open(file, O_RDWR);
	398	if (fd >= 0 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
57fec106 MD	399	if (st.st_size < vnp->size * pgsize)
57fec106 MD	400	ftruncate(fd, vnp->size * pgsize);
984263bc	401	if (vnp->size != 0)
57fec106	402	st.st_size = vnp->size * pgsize;
984263bc MD	403
	404	if (flags & VN_ZERO) {
	405	char *buf = malloc(ZBUFSIZE);
	406	bzero(buf, ZBUFSIZE);
	407	while (st.st_size > 0) {
	408	int n = (st.st_size > ZBUFSIZE) ?
	409	ZBUFSIZE : (int)st.st_size;
	410	if (write(fd, buf, n) != n) {
	411	ftruncate(fd, 0);
	412	printf("Unable to ZERO file %s\n", file);
	413	return(0);
	414	}
	415	st.st_size -= (off_t)n;
	416	}
	417	}
	418	close(fd);
	419	} else {
	420	printf("Unable to open file %s\n", file);
	421	return(0);
	422	}
ba2933c8 SW	423	} else if (file == NULL && vnp->size == 0 && (flags & VN_CONFIG)) {
	424	warnx("specify regular filename or swap size");
	425	return (0);
984263bc MD	426	}
	427
	428	rdev = rawdevice(dev);
	429	f = fopen(rdev, "rw");
	430	if (f == NULL) {
	431	warn("%s", dev);
	432	return(1);
	433	}
	434	vnio.vn_file = file;
	435	vnio.vn_size = vnp->size; /* non-zero only if swap backed */
	436
	437	/*
	438	* Disable the device
	439	*/
	440	if (flags & VN_DISABLE) {
	441	if (flags & (VN_MOUNTRO\|VN_MOUNTRW)) {
	442	rv = unmount(oarg, 0);
	443	if (rv) {
	444	status--;
	445	if (errno == EBUSY)
	446	flags &= ~VN_UNCONFIG;
	447	if ((flags & VN_UNCONFIG) == 0)
	448	warn("umount");
	449	} else if (verbose)
	450	printf("%s: unmounted\n", dev);
	451	}
	452	}
	453	/*
	454	* Clear (un-configure) the device
	455	*/
	456	if (flags & VN_UNCONFIG) {
	457	rv = ioctl(fileno(f), VNIOCDETACH, &vnio);
	458	if (rv) {
	459	if (errno == ENODEV) {
	460	if (verbose)
	461	printf("%s: not configured\n", dev);
	462	rv = 0;
	463	} else {
	464	status--;
	465	warn("VNIOCDETACH");
	466	}
	467	} else if (verbose)
	468	printf("%s: cleared\n", dev);
	469	}
	470	/*
	471	* Set specified options
	472	*/
	473	if (flags & VN_SET) {
	474	l = setopt;
	475	if (global)
	476	rv = ioctl(fileno(f), VNIOCGSET, &l);
	477	else
	478	rv = ioctl(fileno(f), VNIOCUSET, &l);
	479	if (rv) {
	480	status--;
	481	warn("VNIO[GU]SET");
	482	} else if (verbose)
	483	printf("%s: flags now=%08x\n",dev,l);
	484	}
	485	/*
	486	* Reset specified options
	487	*/
	488	if (flags & VN_RESET) {
	489	l = resetopt;
490	if (global)
491	rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
492	else
493	rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
494	if (rv) {
495	status--;
496	warn("VNIO[GU]CLEAR");
497	} else if (verbose)
498	printf("%s: flags now=%08x\n",dev,l);
499	}
500	/*
501	* Configure the device
502	*/
503	if (flags & VN_CONFIG) {
504	rv = ioctl(fileno(f), VNIOCATTACH, &vnio);
505	if (rv) {
506	status--;
507	warn("VNIOCATTACH");
508	flags &= ~VN_ENABLE;
509	} else {
510	if (verbose) {
b3f9ca10 HP	511	printf("%s: %s, ", dev, file);
b3f9ca10 HP	512	if (vnp->size != 0) {
57fec106	513	printf("%lld bytes mapped\n", vnio.vn_size);
b3f9ca10 HP	514	} else {
	515	printf("complete file mapped\n");
	516	}
984263bc MD	517	}
	518	/*
	519	* autolabel
	520	*/
	521	if (vnp->autolabel) {
	522	do_autolabel(vnp->dev, vnp->autolabel);
	523	}
	524	}
	525	}
	526	/*
	527	* Set an option
	528	*/
	529	if (flags & VN_SET) {
	530	l = setopt;
	531	if (global)
	532	rv = ioctl(fileno(f), VNIOCGSET, &l);
	533	else
	534	rv = ioctl(fileno(f), VNIOCUSET, &l);
	535	if (rv) {
	536	status--;
	537	warn("VNIO[GU]SET");
	538	} else if (verbose)
	539	printf("%s: flags now=%08lx\n",dev,l);
	540	}
	541	/*
	542	* Reset an option
	543	*/
	544	if (flags & VN_RESET) {
	545	l = resetopt;
	546	if (global)
	547	rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
	548	else
	549	rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
	550	if (rv) {
	551	status--;
	552	warn("VNIO[GU]CLEAR");
	553	} else if (verbose)
	554	printf("%s: flags now=%08lx\n",dev,l);
	555	}
	556
	557	/*
	558	* Close the device now, as we may want to mount it.
	559	*/
	560	fclose(f);
	561
	562	/*
	563	* Enable special functions on the device
	564	*/
	565	if (flags & VN_ENABLE) {
	566	if (flags & VN_SWAP) {
	567	rv = swapon(dev);
	568	if (rv) {
	569	status--;
	570	warn("swapon");
	571	}
	572	else if (verbose)
	573	printf("%s: swapping enabled\n", dev);
	574	}
	575	if (flags & (VN_MOUNTRO\|VN_MOUNTRW)) {
	576	struct ufs_args args;
	577	int mflags;
	578
	579	args.fspec = dev;
	580	mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0;
581	rv = mount("ufs", oarg, mflags, &args);
582	if (rv) {
583	status--;
584	warn("mount");
585	}
586	else if (verbose)
587	printf("%s: mounted on %s\n", dev, oarg);
588	}
589	}
590	/* done: */
591	fflush(stdout);
592	return(status < 0);
593	}
594
595	#define EOL(c) ((c) == '\0' \|\| (c) == '\n')
596	#define WHITE(c) ((c) == ' ' \|\| (c) == '\t' \|\| (c) == '\n')
597
598	void
cf287f0a	599	readconfig(int flags)
984263bc MD	600	{
	601	char buf[LINESIZE];
	602	FILE *f;
cf287f0a MD	603	char cp, sp;
cf287f0a MD	604	int ix;
984263bc MD	605	int ax;
	606
	607	f = fopen(configfile, "r");
	608	if (f == NULL)
	609	err(1, "%s", configfile);
	610	ix = 0; /* number of elements */
	611	ax = 0; /* allocated elements */
	612	while (fgets(buf, LINESIZE, f) != NULL) {
	613	cp = buf;
	614	if (*cp == '#')
	615	continue;
	616	while (!EOL(cp) && WHITE(cp))
	617	cp++;
	618	if (EOL(*cp))
	619	continue;
	620	sp = cp;
	621	while (!EOL(cp) && !WHITE(cp))
	622	cp++;
	623	if (EOL(*cp))
	624	continue;
	625	*cp++ = '\0';
	626
	627	if (ix == ax) {
	628	ax = ax + 16;
	629	vndisks = realloc(vndisks, ax * sizeof(struct vndisk));
	630	bzero(&vndisks[ix], (ax - ix) * sizeof(struct vndisk));
	631	}
	632	vndisks[ix].dev = malloc(cp - sp);
	633	strcpy(vndisks[ix].dev, sp);
	634	while (!EOL(cp) && WHITE(cp))
	635	cp++;
	636	if (EOL(*cp))
	637	continue;
	638	sp = cp;
	639	while (!EOL(cp) && !WHITE(cp))
	640	cp++;
	641	*cp++ = '\0';
	642
	643	if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) {
	644	vndisks[ix].size = getsize(sp + 1);
	645	} else {
	646	vndisks[ix].file = malloc(cp - sp);
	647	strcpy(vndisks[ix].file, sp);
	648	}
	649
	650	while (!EOL(cp) && WHITE(cp))
	651	cp++;
	652	vndisks[ix].flags = flags;
	653	if (!EOL(*cp)) {
	654	sp = cp;
	655	while (!EOL(cp) && !WHITE(cp))
	656	cp++;
	657	*cp++ = '\0';
	658	getoptions(&vndisks[ix], sp);
	659	}
	660	nvndisks++;
	661	ix++;
	662	}
	663	}
	664
	665	void
acc9b5f2	666	getoptions(struct vndisk vnp, const char fstr)
984263bc MD	667	{
984263bc MD	668	int flags = 0;
acc9b5f2	669	const char *oarg = NULL;
984263bc MD	670
	671	if (strcmp(fstr, "swap") == 0)
	672	flags \|= VN_SWAP;
	673	else if (strncmp(fstr, "mount=", 6) == 0) {
	674	flags \|= VN_MOUNTRW;
	675	oarg = &fstr[6];
	676	} else if (strncmp(fstr, "mountrw=", 8) == 0) {
	677	flags \|= VN_MOUNTRW;
	678	oarg = &fstr[8];
	679	} else if (strncmp(fstr, "mountro=", 8) == 0) {
	680	flags \|= VN_MOUNTRO;
	681	oarg = &fstr[8];
	682	} else if (strcmp(fstr, "ignore") == 0)
	683	flags \|= VN_IGNORE;
	684	vnp->flags \|= flags;
	685	if (oarg) {
	686	vnp->oarg = malloc(strlen(oarg) + 1);
	687	strcpy(vnp->oarg, oarg);
	688	} else
	689	vnp->oarg = NULL;
	690	}
	691
	692	char *
acc9b5f2	693	rawdevice(const char *dev)
984263bc	694	{
cf287f0a	695	char rawbuf, dp, *ep;
984263bc MD	696	struct stat sb;
	697	int len;
	698
	699	len = strlen(dev);
	700	rawbuf = malloc(len + 2);
	701	strcpy(rawbuf, dev);
	702	if (stat(rawbuf, &sb) != 0 \|\| !S_ISCHR(sb.st_mode)) {
17b61719	703	dp = strrchr(rawbuf, '/');
984263bc MD	704	if (dp) {
	705	for (ep = &rawbuf[len]; ep > dp; --ep)
	706	(ep+1) = ep;
	707	*++ep = 'r';
	708	}
	709	}
	710	return (rawbuf);
	711	}
	712
	713	static void
44d05a04	714	usage(void)
984263bc	715	{
daa51328 TN	716	fprintf(stderr, "%s\n%s\n%s\n%s\n",
	717	"usage: vnconfig [-cdeguvTZ] [-s options] [-r options]",
	718	" [-S value] special_file [regular_file] [feature]",
	719	" vnconfig -a [-cdeguv] [-s options] [-r options] [-f config_file]",
	720	" vnconfig -l [special_file ...]");
984263bc MD	721	exit(1);
	722	}
	723
57fec106	724	static int64_t
984263bc MD	725	getsize(const char *arg)
	726	{
	727	char *ptr;
	728	int pgsize = getpagesize();
57fec106	729	int64_t size = strtoq(arg, &ptr, 0);
984263bc MD	730
	731	switch(tolower(*ptr)) {
	732	case 't':
	733	/*
acc9b5f2	734	* GULP! Terabytes. It's actually possible to create
984263bc MD	735	* a 7.9 TB VN device, though newfs can't handle any single
	736	* filesystem larger then 1 TB.
	737	*/
	738	size *= 1024;
	739	/* fall through */
	740	case 'g':
	741	size *= 1024;
	742	/* fall through */
	743	default:
	744	case 'm':
	745	size *= 1024;
	746	/* fall through */
	747	case 'k':
	748	size *= 1024;
	749	/* fall through */
	750	case 'c':
	751	break;
	752	}
	753	size = (size + pgsize - 1) / pgsize;
57fec106	754	return(size);
984263bc MD	755	}
	756
	757	/*
	758	* DO_AUTOLABEL
	759	*
	760	* Automatically label the device. This will wipe any preexisting
	761	* label.
	762	*/
	763
	764	static void
	765	do_autolabel(const char dev, const char label)
	766	{
	767	/* XXX not yet implemented */
	768	fprintf(stderr, "autolabel not yet implemented, sorry\n");
	769	exit(1);
	770	}
	771