[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 *, char *);
int getinfo(const char *vname);
char *rawdevice(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(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(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((char *)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) {
					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);
		}
	}

	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, char *fstr)
{
	int flags = 0;
	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(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!  Terrabytes.  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 EN	98	int config(struct vndisk *);
2d8a3be7 EN	99	void getoptions(struct vndisk , char );
30c1fde0	100	int getinfo(const char *vname);
2d8a3be7 EN	101	char rawdevice(char );
	102	void readconfig(int);
	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);
2d8a3be7	106	int what_opt(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
cf287f0a	247	what_opt(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
	301	vd = open((char *)vnpath, O_RDONLY);
	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
	317	if(stat(vnpath, &sb) < 0)
	318	break;
	319	else {
	320	if (ioctl(vd, VNIOCGET, &vnu) == -1) {
	321	if (errno != ENXIO) {
	322	err(1, "ioctl: %s", vname);
	323	close(vd);
	324	return 1;
	325	}
	326	}
	327
	328	fprintf(stdout, "vn%d: ", vnu.vnu_unit);
	329
	330	if (vnu.vnu_file[0] == 0)
	331	fprintf(stdout, "not in use\n");
	332	else if ((strcmp(vnu.vnu_file, _VN_USER_SWAP)) == 0)
	333	fprintf(stdout,
	334	"consuming %d VM pages\n",
	335	vnu.vnu_size);
	336	else
	337	fprintf(stdout,
0656dd4c	338	"covering %s on %s, inode %ju\n",
30c1fde0 CT	339	vnu.vnu_file,
30c1fde0 CT	340	devname(vnu.vnu_dev, S_IFBLK),
0656dd4c	341	(uintmax_t)vnu.vnu_ino);
30c1fde0 CT	342	}
	343	}
	344	close(vd);
	345	return 0;
	346	}
	347
984263bc	348	int
cf287f0a	349	config(struct vndisk *vnp)
984263bc	350	{
66950a15	351	char dev, file, rdev, oarg;
984263bc	352	FILE *f;
66950a15 HP	353	struct vn_ioctl vnio;
66950a15 HP	354	int flags, pgsize, rv, status;
984263bc	355	u_long l;
66950a15 HP	356
66950a15 HP	357	pgsize = getpagesize();
984263bc MD	358
	359	status = rv = 0;
	360
	361	/*
	362	* Prepend "/dev/" to the specified device name, if necessary.
	363	* Operate on vnp->dev because it is used later.
	364	*/
	365	if (vnp->dev[0] != '/' && vnp->dev[0] != '.')
71126e33	366	asprintf(&vnp->dev, "%s%s", _PATH_DEV, vnp->dev);
984263bc MD	367	dev = vnp->dev;
	368	file = vnp->file;
	369	flags = vnp->flags;
	370	oarg = vnp->oarg;
	371
	372	if (flags & VN_IGNORE)
	373	return(0);
	374
	375	/*
	376	* When a regular file has been specified, do any requested setup
	377	* of the file. Truncation (also creates the file if necessary),
	378	* sizing, and zeroing.
	379	*/
	380
	381	if (file && vnp->size != 0 && (flags & VN_CONFIG)) {
	382	int fd;
	383	struct stat st;
	384
	385	if (flags & VN_TRUNCATE)
c7daadb1	386	fd = open(file, O_RDWR\|O_CREAT\|O_TRUNC, 0600);
984263bc MD	387	else
	388	fd = open(file, O_RDWR);
	389	if (fd >= 0 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) {
57fec106 MD	390	if (st.st_size < vnp->size * pgsize)
57fec106 MD	391	ftruncate(fd, vnp->size * pgsize);
984263bc	392	if (vnp->size != 0)
57fec106	393	st.st_size = vnp->size * pgsize;
984263bc MD	394
	395	if (flags & VN_ZERO) {
	396	char *buf = malloc(ZBUFSIZE);
	397	bzero(buf, ZBUFSIZE);
	398	while (st.st_size > 0) {
	399	int n = (st.st_size > ZBUFSIZE) ?
	400	ZBUFSIZE : (int)st.st_size;
	401	if (write(fd, buf, n) != n) {
	402	ftruncate(fd, 0);
	403	printf("Unable to ZERO file %s\n", file);
	404	return(0);
	405	}
	406	st.st_size -= (off_t)n;
	407	}
	408	}
	409	close(fd);
	410	} else {
	411	printf("Unable to open file %s\n", file);
	412	return(0);
	413	}
	414	}
	415
	416	rdev = rawdevice(dev);
	417	f = fopen(rdev, "rw");
	418	if (f == NULL) {
	419	warn("%s", dev);
	420	return(1);
	421	}
	422	vnio.vn_file = file;
	423	vnio.vn_size = vnp->size; /* non-zero only if swap backed */
	424
	425	/*
	426	* Disable the device
	427	*/
	428	if (flags & VN_DISABLE) {
	429	if (flags & (VN_MOUNTRO\|VN_MOUNTRW)) {
	430	rv = unmount(oarg, 0);
	431	if (rv) {
	432	status--;
	433	if (errno == EBUSY)
	434	flags &= ~VN_UNCONFIG;
	435	if ((flags & VN_UNCONFIG) == 0)
	436	warn("umount");
	437	} else if (verbose)
	438	printf("%s: unmounted\n", dev);
	439	}
	440	}
	441	/*
	442	* Clear (un-configure) the device
	443	*/
	444	if (flags & VN_UNCONFIG) {
	445	rv = ioctl(fileno(f), VNIOCDETACH, &vnio);
	446	if (rv) {
	447	if (errno == ENODEV) {
	448	if (verbose)
	449	printf("%s: not configured\n", dev);
	450	rv = 0;
	451	} else {
	452	status--;
	453	warn("VNIOCDETACH");
	454	}
	455	} else if (verbose)
	456	printf("%s: cleared\n", dev);
	457	}
458	/*
459	* Set specified options
460	*/
461	if (flags & VN_SET) {
462	l = setopt;
463	if (global)
464	rv = ioctl(fileno(f), VNIOCGSET, &l);
465	else
466	rv = ioctl(fileno(f), VNIOCUSET, &l);
467	if (rv) {
468	status--;
469	warn("VNIO[GU]SET");
470	} else if (verbose)
471	printf("%s: flags now=%08x\n",dev,l);
472	}
473	/*
474	* Reset specified options
475	*/
476	if (flags & VN_RESET) {
477	l = resetopt;
478	if (global)
479	rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
480	else
481	rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
482	if (rv) {
483	status--;
484	warn("VNIO[GU]CLEAR");
485	} else if (verbose)
486	printf("%s: flags now=%08x\n",dev,l);
487	}
488	/*
489	* Configure the device
490	*/
491	if (flags & VN_CONFIG) {
492	rv = ioctl(fileno(f), VNIOCATTACH, &vnio);
493	if (rv) {
494	status--;
495	warn("VNIOCATTACH");
496	flags &= ~VN_ENABLE;
497	} else {
498	if (verbose) {
b3f9ca10 HP	499	printf("%s: %s, ", dev, file);
b3f9ca10 HP	500	if (vnp->size != 0) {
57fec106	501	printf("%lld bytes mapped\n", vnio.vn_size);
b3f9ca10 HP	502	} else {
	503	printf("complete file mapped\n");
	504	}
984263bc MD	505	}
	506	/*
	507	* autolabel
	508	*/
	509	if (vnp->autolabel) {
	510	do_autolabel(vnp->dev, vnp->autolabel);
	511	}
	512	}
	513	}
	514	/*
	515	* Set an option
	516	*/
	517	if (flags & VN_SET) {
	518	l = setopt;
	519	if (global)
	520	rv = ioctl(fileno(f), VNIOCGSET, &l);
	521	else
	522	rv = ioctl(fileno(f), VNIOCUSET, &l);
	523	if (rv) {
	524	status--;
	525	warn("VNIO[GU]SET");
	526	} else if (verbose)
	527	printf("%s: flags now=%08lx\n",dev,l);
	528	}
	529	/*
	530	* Reset an option
	531	*/
	532	if (flags & VN_RESET) {
	533	l = resetopt;
	534	if (global)
	535	rv = ioctl(fileno(f), VNIOCGCLEAR, &l);
	536	else
	537	rv = ioctl(fileno(f), VNIOCUCLEAR, &l);
	538	if (rv) {
	539	status--;
	540	warn("VNIO[GU]CLEAR");
	541	} else if (verbose)
	542	printf("%s: flags now=%08lx\n",dev,l);
	543	}
	544
	545	/*
	546	* Close the device now, as we may want to mount it.
	547	*/
	548	fclose(f);
	549
	550	/*
	551	* Enable special functions on the device
	552	*/
	553	if (flags & VN_ENABLE) {
	554	if (flags & VN_SWAP) {
	555	rv = swapon(dev);
	556	if (rv) {
	557	status--;
	558	warn("swapon");
	559	}
	560	else if (verbose)
	561	printf("%s: swapping enabled\n", dev);
	562	}
	563	if (flags & (VN_MOUNTRO\|VN_MOUNTRW)) {
	564	struct ufs_args args;
	565	int mflags;
	566
	567	args.fspec = dev;
	568	mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0;
569	rv = mount("ufs", oarg, mflags, &args);
570	if (rv) {
571	status--;
572	warn("mount");
573	}
574	else if (verbose)
575	printf("%s: mounted on %s\n", dev, oarg);
576	}
577	}
578	/* done: */
579	fflush(stdout);
580	return(status < 0);
581	}
582
583	#define EOL(c) ((c) == '\0' \|\| (c) == '\n')
584	#define WHITE(c) ((c) == ' ' \|\| (c) == '\t' \|\| (c) == '\n')
585
586	void
cf287f0a	587	readconfig(int flags)
984263bc MD	588	{
	589	char buf[LINESIZE];
	590	FILE *f;
cf287f0a MD	591	char cp, sp;
cf287f0a MD	592	int ix;
984263bc MD	593	int ax;
	594
	595	f = fopen(configfile, "r");
	596	if (f == NULL)
	597	err(1, "%s", configfile);
	598	ix = 0; /* number of elements */
	599	ax = 0; /* allocated elements */
	600	while (fgets(buf, LINESIZE, f) != NULL) {
	601	cp = buf;
	602	if (*cp == '#')
	603	continue;
	604	while (!EOL(cp) && WHITE(cp))
	605	cp++;
	606	if (EOL(*cp))
	607	continue;
	608	sp = cp;
	609	while (!EOL(cp) && !WHITE(cp))
	610	cp++;
	611	if (EOL(*cp))
	612	continue;
	613	*cp++ = '\0';
	614
	615	if (ix == ax) {
	616	ax = ax + 16;
	617	vndisks = realloc(vndisks, ax * sizeof(struct vndisk));
	618	bzero(&vndisks[ix], (ax - ix) * sizeof(struct vndisk));
	619	}
	620	vndisks[ix].dev = malloc(cp - sp);
	621	strcpy(vndisks[ix].dev, sp);
	622	while (!EOL(cp) && WHITE(cp))
	623	cp++;
	624	if (EOL(*cp))
	625	continue;
	626	sp = cp;
	627	while (!EOL(cp) && !WHITE(cp))
	628	cp++;
	629	*cp++ = '\0';
	630
	631	if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) {
	632	vndisks[ix].size = getsize(sp + 1);
	633	} else {
	634	vndisks[ix].file = malloc(cp - sp);
	635	strcpy(vndisks[ix].file, sp);
	636	}
	637
	638	while (!EOL(cp) && WHITE(cp))
	639	cp++;
	640	vndisks[ix].flags = flags;
	641	if (!EOL(*cp)) {
	642	sp = cp;
	643	while (!EOL(cp) && !WHITE(cp))
	644	cp++;
	645	*cp++ = '\0';
	646	getoptions(&vndisks[ix], sp);
	647	}
	648	nvndisks++;
	649	ix++;
	650	}
	651	}
	652
	653	void
cf287f0a	654	getoptions(struct vndisk vnp, char fstr)
984263bc MD	655	{
	656	int flags = 0;
	657	char *oarg = NULL;
	658
	659	if (strcmp(fstr, "swap") == 0)
	660	flags \|= VN_SWAP;
	661	else if (strncmp(fstr, "mount=", 6) == 0) {
	662	flags \|= VN_MOUNTRW;
	663	oarg = &fstr[6];
	664	} else if (strncmp(fstr, "mountrw=", 8) == 0) {
	665	flags \|= VN_MOUNTRW;
	666	oarg = &fstr[8];
	667	} else if (strncmp(fstr, "mountro=", 8) == 0) {
	668	flags \|= VN_MOUNTRO;
	669	oarg = &fstr[8];
	670	} else if (strcmp(fstr, "ignore") == 0)
	671	flags \|= VN_IGNORE;
	672	vnp->flags \|= flags;
	673	if (oarg) {
	674	vnp->oarg = malloc(strlen(oarg) + 1);
	675	strcpy(vnp->oarg, oarg);
	676	} else
	677	vnp->oarg = NULL;
	678	}
	679
	680	char *
cf287f0a	681	rawdevice(char *dev)
984263bc	682	{
cf287f0a	683	char rawbuf, dp, *ep;
984263bc MD	684	struct stat sb;
	685	int len;
	686
	687	len = strlen(dev);
	688	rawbuf = malloc(len + 2);
	689	strcpy(rawbuf, dev);
	690	if (stat(rawbuf, &sb) != 0 \|\| !S_ISCHR(sb.st_mode)) {
17b61719	691	dp = strrchr(rawbuf, '/');
984263bc MD	692	if (dp) {
	693	for (ep = &rawbuf[len]; ep > dp; --ep)
	694	(ep+1) = ep;
	695	*++ep = 'r';
	696	}
	697	}
	698	return (rawbuf);
	699	}
	700
	701	static void
44d05a04	702	usage(void)
984263bc	703	{
daa51328 TN	704	fprintf(stderr, "%s\n%s\n%s\n%s\n",
	705	"usage: vnconfig [-cdeguvTZ] [-s options] [-r options]",
	706	" [-S value] special_file [regular_file] [feature]",
	707	" vnconfig -a [-cdeguv] [-s options] [-r options] [-f config_file]",
	708	" vnconfig -l [special_file ...]");
984263bc MD	709	exit(1);
	710	}
	711
57fec106	712	static int64_t
984263bc MD	713	getsize(const char *arg)
	714	{
	715	char *ptr;
	716	int pgsize = getpagesize();
57fec106	717	int64_t size = strtoq(arg, &ptr, 0);
984263bc MD	718
	719	switch(tolower(*ptr)) {
	720	case 't':
	721	/*
	722	* GULP! Terrabytes. It's actually possible to create
	723	* a 7.9 TB VN device, though newfs can't handle any single
	724	* filesystem larger then 1 TB.
	725	*/
	726	size *= 1024;
	727	/* fall through */
	728	case 'g':
	729	size *= 1024;
	730	/* fall through */
	731	default:
	732	case 'm':
	733	size *= 1024;
	734	/* fall through */
	735	case 'k':
	736	size *= 1024;
	737	/* fall through */
	738	case 'c':
	739	break;
	740	}
	741	size = (size + pgsize - 1) / pgsize;
57fec106	742	return(size);
984263bc MD	743	}
	744
	745	/*
	746	* DO_AUTOLABEL
	747	*
	748	* Automatically label the device. This will wipe any preexisting
	749	* label.
	750	*/
	751
	752	static void
	753	do_autolabel(const char dev, const char label)
	754	{
	755	/* XXX not yet implemented */
	756	fprintf(stderr, "autolabel not yet implemented, sorry\n");
	757	exit(1);
	758	}
	759