freebsd/sbin/vinum/commands.c

/* commands.c: vinum interface program, main commands */
/*-
 * Copyright (c) 1997, 1998
 *	Nan Yang Computer Services Limited.  All rights reserved.
 *
 *  This software is distributed under the so-called ``Berkeley
 *  License'':
 *
 * 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 Nan Yang Computer
 *      Services Limited.
 * 4. Neither the name of the Company 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 ``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 company 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.
 *
 */

/* $Id: commands.c,v 1.3 1998/10/27 06:10:45 grog Exp grog $ */

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <libutil.h>
#include <netdb.h>
#include <setjmp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "vinumhdr.h"
#include "vext.h"
#include <sys/types.h>
#include <sys/wait.h>
#include <readline/history.h>
#include <readline/readline.h>

static void dorename(struct vinum_rename_msg *msg, const char *oldname, const char *name, int maxlen);

void 
vinum_create(int argc, char *argv[], char *arg0[])
{
    int error;
    FILE *dfd;						    /* file descriptor for the config file */
    char buffer[BUFSIZE];				    /* read config file in here */
    struct _ioctl_reply *reply;

    if (argc != 1) {					    /* wrong arg count */
	fprintf(stderr, "Expecting 1 parameter, not %d\n", argc);
	return;
    }
    reply = (struct _ioctl_reply *) &buffer;
    dfd = fopen(argv[0], "r");
    if (dfd == NULL) {					    /* no go */
	fprintf(stderr, "Can't open %s: %s\n", argv[0], strerror(errno));
	return;
    }
    if (ioctl(superdev, VINUM_STARTCONFIG, NULL)) {	    /* can't get config? */
	printf("Can't configure: %s (%d)\n", strerror(errno), errno);
	return;
    }
    file_line = 0;					    /* start with line 1 */
    /* Parse the configuration, and add it to the global configuration */
    for (;;) {						    /* love this style(9) */
	char *configline;

	configline = fgets(buffer, BUFSIZE, dfd);

	if (configline == NULL) {
	    if (ferror(dfd))
		perror("Can't read config file");
	    break;
	}
	file_line++;					    /* count the lines */
	if (verbose)
	    printf("%4d: %s", file_line, buffer);	    /* XXX */
	ioctl(superdev, VINUM_CREATE, &buffer);
	if (reply->error != 0) {			    /* error in config */
	    fprintf(stdout, "** %d %s: %s\n", file_line, reply->msg, strerror(reply->error));
	    /* XXX at the moment, we reset the config
	     * lock on error, so try to get it again.
	     * If we fail, don't cry again */
	    if (ioctl(superdev, VINUM_STARTCONFIG, NULL))   /* can't get config? */
		return;
	}
    }
    fclose(dfd);					    /* done with the config file */
    error = ioctl(superdev, VINUM_SAVECONFIG, NULL);	    /* save the config to disk */
    if (error != 0)
	perror("Can't save Vinum config");
    make_devices();
    listconfig();
}

/* Read vinum config from a disk */
void 
vinum_read(int argc, char *argv[], char *arg0[])
{
    int error;
    char buffer[BUFSIZE];				    /* read config file in here */
    struct _ioctl_reply *reply;
    reply = (struct _ioctl_reply *) &buffer;

    if (argc != 1) {					    /* wrong arg count */
	fprintf(stderr, "Expecting 1 parameter, not %d\n", argc);
	return;
    }
    strcpy(buffer, "read ");
    strcat(buffer, argv[0]);
    if (ioctl(superdev, VINUM_STARTCONFIG, NULL)) {	    /* can't get config? */
	printf("Can't configure: %s (%d)\n", strerror(errno), errno);
	return;
    }
    ioctl(superdev, VINUM_CREATE, &buffer);
    if (reply->error != 0) {				    /* error in config */
	fprintf(stdout, "** %s: %s\n", reply->msg, strerror(reply->error));
	error = ioctl(superdev, VINUM_RELEASECONFIG, NULL); /* save the config to disk */
	if (error != 0)
	    perror("Can't save Vinum config");
    } else {
	error = ioctl(superdev, VINUM_RELEASECONFIG, NULL); /* save the config to disk */
	if (error != 0)
	    perror("Can't save Vinum config");
	make_devices();
    }
}

void 
vinum_volume(int argc, char *argv[], char *arg0[])
{
    int i;
    char *line;
    struct _ioctl_reply *reply;

    line = arg0[0];
    for (i = 0; i < argc; i++)
	line[strlen(line)] = ' ';			    /* remove the blocks */
    ioctl(superdev, VINUM_CREATE, line);
    reply = (struct _ioctl_reply *) line;
    if (reply->error != 0)				    /* error in config */
	fprintf(stdout, "** %d %s: %s\n", file_line, reply->msg, strerror(reply->error));
}

void 
vinum_plex(int argc, char *argv[], char *arg0[])
{
    int i;
    char *line;
    struct _ioctl_reply *reply;

    line = arg0[0];
    for (i = 0; i < argc; i++)
	line[strlen(line)] = ' ';			    /* remove the blocks */
    ioctl(superdev, VINUM_CREATE, line);
    reply = (struct _ioctl_reply *) line;
    if (reply->error != 0)				    /* error in config */
	fprintf(stdout, "** %d %s: %s\n", file_line, reply->msg, strerror(reply->error));
}

void 
vinum_sd(int argc, char *argv[], char *arg0[])
{
    int i;
    char *line;
    struct _ioctl_reply *reply;

    line = arg0[0];
    for (i = 0; i < argc; i++)
	line[strlen(line)] = ' ';			    /* remove the blocks */
    ioctl(superdev, VINUM_CREATE, line);
    reply = (struct _ioctl_reply *) line;
    if (reply->error != 0)				    /* error in config */
	fprintf(stdout, "** %d %s: %s\n", file_line, reply->msg, strerror(reply->error));
}

void 
vinum_drive(int argc, char *argv[], char *arg0[])
{
    int i;
    char *line;
    struct _ioctl_reply *reply;

    line = arg0[0];
    for (i = 0; i < argc; i++)
	line[strlen(line)] = ' ';			    /* remove the blocks */
    ioctl(superdev, VINUM_CREATE, line);
    reply = (struct _ioctl_reply *) line;
    if (reply->error != 0)				    /* error in config */
	fprintf(stdout, "** %d %s: %s\n", file_line, reply->msg, strerror(reply->error));
}

#ifdef DEBUG
void 
vinum_debug(int argc, char *argv[], char *arg0[])
{
    struct debuginfo info;

    if (argc > 0) {
	info.param = atoi(argv[0]);
	info.changeit = 1;
    } else {
	info.changeit = 0;
	sleep(2);					    /* give a chance to leave the window */
    }
    ioctl(superdev, VINUM_DEBUG, (caddr_t) & info);
}
#endif

void 
vinum_modify(int argc, char *argv[], char *arg0[])
{
    fprintf(stderr, "Modify command is currently not implemented\n");
}

void 
vinum_set(int argc, char *argv[], char *arg0[])
{
    fprintf(stderr, "set is not implemented yet\n");
}

void 
vinum_rm(int argc, char *argv[], char *arg0[])
{
    int object;
    struct _ioctl_reply reply;
    struct vinum_ioctl_msg *message = (struct vinum_ioctl_msg *) &reply;

    if (argc == 0)					    /* start everything */
	fprintf(stderr, "what do you want to remove?\n");
    else {						    /* start specified objects */
	int index;
	enum objecttype type;

	for (index = 0; index < argc; index++) {
	    object = find_object(argv[index], &type);	    /* look for it */
	    if (type == invalid_object)
		fprintf(stderr, "Can't find object: %s\n", argv[index]);
	    else {
		message->index = object;		    /* pass object number */
		message->type = type;			    /* and type of object */
		message->force = force;			    /* do we want to force the operation? */
		message->recurse = recurse;		    /* do we want to remove subordinates? */
		ioctl(superdev, VINUM_REMOVE, message);
		if (reply.error != 0) {
		    fprintf(stderr,
			"Can't remove %s: %s (%d)\n",
			argv[index],
			reply.msg[0] ? reply.msg : strerror(reply.error),
			reply.error);
		} else if (verbose)
		    fprintf(stderr, "%s removed\n", argv[index]);
	    }
	}
    }
}

void 
vinum_resetconfig(int argc, char *argv[], char *arg0[])
{
    char reply[32];
    int error;

    printf(" WARNING!  This command will completely wipe out your vinum configuration.\n"
	" All data will be lost.  If you really want to do this, enter the text\n\n"
	" NO FUTURE\n"
	" Enter text -> ");
    fgets(reply, sizeof(reply), stdin);
    if (strcmp(reply, "NO FUTURE\n"))			    /* changed his mind */
	printf("\n No change\n");
    else {
	error = ioctl(superdev, VINUM_RESETCONFIG, NULL);   /* trash config on disk */
	if (error) {
	    if (errno == EBUSY)
		fprintf(stderr, "Can't reset configuration: objects are in use\n");
	    else
		perror("Can't find vinum config");
	} else {
	    printf("\b Vinum configuration obliterated\n");
	    system("rm -rf " VINUM_DIR "/" "*");	    /* remove the old /dev/vinum */
	    syslog(LOG_NOTICE | LOG_KERN, "configuration obliterated");
	}
    }
}

void 
vinum_init(int argc, char *argv[], char *arg0[])
{
    if (argc > 0) {					    /* initialize plexes */
	int plexindex;
	int sdno;
	int plexno;
	int plexfh = NULL;				    /* file handle for plex */
	pid_t pid;
	enum objecttype type;				    /* type returned */
	struct _ioctl_reply reply;
	struct vinum_ioctl_msg *message = (struct vinum_ioctl_msg *) &reply;
	char filename[MAXPATHLEN];			    /* create a file name here */

	for (plexindex = 0; plexindex < argc; plexindex++) {
	    plexno = find_object(argv[plexindex], &type);   /* find the object */
	    if (plexno < 0)
		printf("Can't find %s\n", argv[plexindex]);
	    else if (type != plex_object) {
		/* XXX Consider doing this for all plexes in
		 * a volume, etc. */
		printf("%s is not a plex\n", argv[plexindex]);
		break;
	    } else if (plex.state == plex_unallocated)	    /* not a real plex, */
		printf("%s is not allocated, can't initialize\n", plex.name);
	    else {
		sprintf(filename, VINUM_DIR "/plex/%s", argv[plexindex]);
		if ((plexfh = open(filename, O_RDWR, S_IRWXU)) < 0) { /* got a plex, open it */
							    /* We don't actually write anything to the plex,
		       * since the system will try to format it.  We open
		       * it to ensure that nobody else tries to open it
		       * while we initialize its subdisks */
		    fprintf(stderr, "can't open plex %s: %s\n", filename, strerror(errno));
		    return;
		}
	    }
	    message->index = plexno;			    /* pass object number */
	    message->type = plex_object;		    /* and type of object */
	    message->state = object_initializing;
	    message->force = 1;				    /* insist */
	    ioctl(superdev, VINUM_SETSTATE, message);
	    if (reply.error) {
		syslog(LOG_ERR | LOG_KERN,
		    "can't initialize %s: %s",
		    plex.name,
		    reply.msg[0] ? reply.msg : strerror(reply.error));
	    } else {
		pid = fork();
		if (pid == 0) {				    /* we're the child */
		    int failed = 0;			    /* set if a child dies badly */
		    int sdfh;				    /* and for subdisk */
		    char zeros[PLEXINITSIZE];
		    int count;				    /* write count */
		    long long offset;			    /* offset in subdisk */
		    long long sdsize;			    /* size of subdisk */

		    bzero(zeros, sizeof(zeros));
		    openlog("vinum", LOG_CONS | LOG_PERROR | LOG_PID, LOG_KERN);
		    for (sdno = 0; sdno < plex.subdisks; sdno++) { /* initialize each subdisk */
							    /* We already have the plex data in global
			 * plex from the call to find_object */
			pid = fork();			    /* into the background with you */
			if (pid == 0) {			    /* I'm the child */
			    get_plex_sd_info(&sd, plexno, sdno);
			    sdsize = sd.sectors * DEV_BSIZE; /* size of subdisk in bytes */
			    sprintf(filename, VINUM_DIR "/sd/%s", sd.name);
			    setproctitle("initializing %s", filename); /* show what we're doing */
			    syslog(LOG_INFO | LOG_KERN, "initializing subdisk %s\n", filename);
			    if ((sdfh = open(filename, O_RDWR, S_IRWXU)) < 0) {	/* no go */
				syslog(LOG_ERR | LOG_KERN,
				    "can't open subdisk %s: %s\n",
				    filename,
				    strerror(errno));
				exit(1);
			    }
			    for (offset = 0; offset < sdsize; offset += count) {
				count = write(sdfh, zeros, PLEXINITSIZE); /* write a block */
				if (count < 0) {
				    syslog(LOG_ERR | LOG_KERN,
					"can't write subdisk %s: %s\n",
					filename,
					strerror(errno));
				    exit(1);
				}
							    /* XXX Grrrr why doesn't this thing recognize EOF? */
				else if (count == 0)
				    break;
			    }
			    syslog(LOG_INFO | LOG_KERN, "subdisk %s initialized\n", filename);
			    exit(0);
			} else if (pid < 0)		    /* failure */
			    printf("couldn't fork for subdisk %d: %s", sdno, strerror(errno));
		    }
							    /* Now wait for them to complete */
		    for (sdno = 0; sdno < plex.subdisks; sdno++) {
			int status;
			pid = wait(&status);
			if (WEXITSTATUS(status) != 0) {	    /* oh, oh */
			    printf("child %d exited with status 0x%x\n", pid, WEXITSTATUS(status));
			    failed++;
			}
		    }
		    if (failed == 0) {
			for (sdno = 0; sdno < plex.subdisks; sdno++) { /* bring the subdisks up */
			    get_plex_sd_info(&sd, plexno, sdno); /* get the SD info again */
			    message->index = sd.sdno;	    /* pass object number */
			    message->type = sd_object;	    /* and type of object */
			    message->state = object_up;
			    message->force = 1;		    /* insist */
			    ioctl(superdev, VINUM_SETSTATE, message);
			}
			syslog(LOG_INFO | LOG_KERN, "plex %s initialized\n", plex.name);
		    } else
			syslog(LOG_ERR | LOG_KERN, "couldn't initialize plex %s, %d processes died\n",
			    plex.name,
			    failed);
		    exit(0);
		} else
		    close(plexfh);			    /* we don't need this any more */
	    }
	}
    }
}

void 
vinum_start(int argc, char *argv[], char *arg0[])
{
    int object;
    struct _ioctl_reply reply;
    struct vinum_ioctl_msg *message = (struct vinum_ioctl_msg *) &reply;

    if (argc == 0)					    /* start everything */
	fprintf(stderr, "start must have an argument\n");
    else {						    /* start specified objects */
	int index;
	enum objecttype type;

	for (index = 0; index < argc; index++) {
	    object = find_object(argv[index], &type);	    /* look for it */
	    if (type == invalid_object)
		fprintf(stderr, "Can't find object: %s\n", argv[index]);
	    else {
		message->index = object;		    /* pass object number */
		message->type = type;			    /* and type of object */
		message->state = object_up;
		ioctl(superdev, VINUM_SETSTATE, message);
		if (reply.error != 0) {
		    if ((reply.error == EAGAIN)		    /* we're reviving */
		    &&(type == plex_object))
			continue_revive(object);
		    else
			fprintf(stderr,
			    "Can't start %s: %s (%d)\n",
			    argv[index],
			    reply.msg[0] ? reply.msg : strerror(reply.error),
			    reply.error);
		}
		if (Verbose)
		    vinum_li(object, type);
	    }
	}
    }
}

void 
vinum_stop(int argc, char *argv[], char *arg0[])
{
    int object;
    struct _ioctl_reply reply;
    struct vinum_ioctl_msg *message = (struct vinum_ioctl_msg *) &reply;

    message->force = force;				    /* should we force the transition? */
    if (argc == 0)					    /* stop everything */
	fprintf(stderr, "stop must have an argument\n");
    else {						    /* stop specified objects */
	int i;
	enum objecttype type;

	for (i = 0; i < argc; i++) {
	    object = find_object(argv[i], &type);	    /* look for it */
	    if (type == invalid_object)
		fprintf(stderr, "Can't find object: %s\n", argv[i]);
	    else {
		message->index = object;		    /* pass object number */
		message->type = type;			    /* and type of object */
		message->state = object_down;
		ioctl(superdev, VINUM_SETSTATE, message);
		if (reply.error != 0)
		    fprintf(stderr,
			"Can't stop %s: %s (%d)\n",
			argv[i],
			reply.msg[0] ? reply.msg : strerror(reply.error),
			reply.error);
		if (Verbose)
		    vinum_li(object, type);
	    }
	}
    }
}

void 
vinum_label(int argc, char *argv[], char *arg0[])
{
    int object;
    struct _ioctl_reply reply;
    int *message = (int *) &reply;

    if (argc == 0)					    /* start everything */
	fprintf(stderr, "label: please specify one or more volume names\n");
    else {						    /* start specified objects */
	int i;
	enum objecttype type;

	for (i = 0; i < argc; i++) {
	    object = find_object(argv[i], &type);	    /* look for it */
	    if (type == invalid_object)
		fprintf(stderr, "Can't find object: %s\n", argv[i]);
	    else if (type != volume_object)		    /* it exists, but it isn't a volume */
		fprintf(stderr, "%s is not a volume\n", argv[i]);
	    else {
		message[0] = object;			    /* pass object number */
		ioctl(superdev, VINUM_LABEL, message);
		if (reply.error != 0)
		    fprintf(stderr,
			"Can't label %s: %s (%d)\n",
			argv[i],
			reply.msg[0] ? reply.msg : strerror(reply.error),
			reply.error);
		if (Verbose)
		    vinum_li(object, type);
	    }
	}
    }
}

void 
reset_volume_stats(int volno, int recurse)
{
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    msg.index = volno;
    msg.type = volume_object;
    /* XXX get these numbers right if we ever
     * actually return errors */
    if (ioctl(superdev, VINUM_RESETSTATS, &msg) < 0) {
	fprintf(stderr, "Can't reset stats for volume %d: %s\n", volno, reply->msg);
	longjmp(command_fail, -1);
    } else if (recurse) {
	struct volume vol;
	int plexno;

	get_volume_info(&vol, volno);
	for (plexno = 0; plexno < vol.plexes; plexno++)
	    reset_plex_stats(vol.plex[plexno], recurse);
    }
}

void 
reset_plex_stats(int plexno, int recurse)
{
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    msg.index = plexno;
    msg.type = plex_object;
    /* XXX get these numbers right if we ever
     * actually return errors */
    if (ioctl(superdev, VINUM_RESETSTATS, &msg) < 0) {
	fprintf(stderr, "Can't reset stats for plex %d: %s\n", plexno, reply->msg);
	longjmp(command_fail, -1);
    } else if (recurse) {
	struct plex plex;
	struct sd sd;
	int sdno;

	get_plex_info(&plex, plexno);
	for (sdno = 0; sdno < plex.subdisks; sdno++) {
	    get_plex_sd_info(&sd, plex.plexno, sdno);
	    reset_sd_stats(sd.sdno, recurse);
	}
    }
}

void 
reset_sd_stats(int sdno, int recurse)
{
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    msg.index = sdno;
    msg.type = sd_object;
    /* XXX get these numbers right if we ever
     * actually return errors */
    if (ioctl(superdev, VINUM_RESETSTATS, &msg) < 0) {
	fprintf(stderr, "Can't reset stats for subdisk %d: %s\n", sdno, reply->msg);
	longjmp(command_fail, -1);
    } else if (recurse)
	reset_drive_stats(sd.driveno);
}

void 
reset_drive_stats(int driveno)
{
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    msg.index = driveno;
    msg.type = drive_object;
    /* XXX get these numbers right if we ever
     * actually return errors */
    if (ioctl(superdev, VINUM_RESETSTATS, &msg) < 0) {
	fprintf(stderr, "Can't reset stats for drive %d: %s\n", driveno, reply->msg);
	longjmp(command_fail, -1);
    }
}

void 
vinum_resetstats(int argc, char *argv[], char *argv0[])
{
    int i;
    int objno;
    enum objecttype type;

    if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
	perror("Can't get vinum config");
	return;
    }
    if (argc == 0) {
	for (objno = 0; objno < vinum_conf.volumes_used; objno++)
	    reset_volume_stats(objno, 1);		    /* clear everything recursively */
    } else {
	for (i = 0; i < argc; i++) {
	    objno = find_object(argv[i], &type);
	    if (objno >= 0) {				    /* not invalid */
		switch (type) {
		case drive_object:
		    reset_drive_stats(objno);
		    break;

		case sd_object:
		    reset_sd_stats(objno, recurse);
		    break;

		case plex_object:
		    reset_plex_stats(objno, recurse);
		    break;

		case volume_object:
		    reset_volume_stats(objno, recurse);
		    break;

		case invalid_object:			    /* can't get this */
		    break;
		}
	    }
	}
    }
}

/* Attach a subdisk to a plex, or a plex to a volume.
 * attach subdisk plex [offset] [rename]
 * attach plex volume  [rename]
 */
void 
vinum_attach(int argc, char *argv[], char *argv0[])
{
    int i;
    enum objecttype supertype;
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;
    const char *objname = argv[0];
    const char *supername = argv[1];
    int sdno;
    int plexno = -1;
    char newname[MAXNAME + 8];
    int rename = 0;					    /* set if we want to rename the object */

    if ((argc < 2)
	|| (argc > 4)) {
	fprintf(stderr,
	    "Usage: \tattach <subdisk> <plex> [rename] [<plexoffset>]\n"
	    "\tattach <plex> <volume> [rename]\n");
	return;
    }
    if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
	perror("Can't get vinum config");
	return;
    }
    msg.index = find_object(objname, &msg.type);	    /* find the object to attach */
    msg.otherobject = find_object(supername, &supertype);   /* and the object to attach to */
    msg.force = force;					    /* did we specify the use of force? */
    msg.recurse = recurse;
    msg.offset = -1;					    /* and no offset */

    for (i = 2; i < argc; i++) {
	if (!strcmp(argv[i], "rename")) {
	    rename = 1;
	    msg.rename = 1;				    /* do renaming */
	} else if (!isdigit(argv[i][0])) {		    /* not an offset */
	    fprintf(stderr, "Unknown attribute: %s\n", supername);
	    return;
	} else
	    msg.offset = sizespec(argv[i]);
    }

    switch (msg.type) {
    case sd_object:
	if (supertype != plex_object) {			    /* huh? */
	    fprintf(stderr, "%s can only be attached to a plex\n", objname);
	    return;
	}
	get_plex_info(&plex, supertype);
	if (plex.organization != plex_concat) {		    /* not a cat plex, */
	    fprintf(stderr, "Can't attach subdisks to a %s plex\n", plex_org(plex.organization));
	    return;
	}
	break;

    case plex_object:
	if (supertype != volume_object) {		    /* huh? */
	    fprintf(stderr, "%s can only be attached to a volume\n", objname);
	    return;
	}
	plexno = msg.index;				    /* note the plex number, we'll need it again */
	break;

    case volume_object:
    case drive_object:
	fprintf(stderr, "Can only attach subdisks and plexes\n");
	return;

    default:
	fprintf(stderr, "%s is not a Vinum object\n", objname);
	return;
    }

    ioctl(superdev, VINUM_ATTACH, &msg);
    if (reply->error != 0) {
	if (reply->error == EAGAIN)			    /* reviving */
	    continue_revive(plexno);			    /* continue the revive */
	else
	    fprintf(stderr,
		"Can't attach %s to %s: %s (%d)\n",
		objname,
		supername,
		reply->msg[0] ? reply->msg : strerror(reply->error),
		reply->error);
    }
    if (rename) {
	struct sd;
	struct plex;
	struct volume;

	/* we've overwritten msg with the
	 * ioctl reply, start again */
	msg.index = find_object(objname, &msg.type);	    /* find the object to rename */
	switch (msg.type) {
	case sd_object:
	    get_sd_info(&sd, msg.index);
	    get_plex_info(&plex, sd.plexno);
	    for (sdno = 0; sdno < plex.subdisks; sdno++) {
		if (plex.sdnos[sdno] == msg.index)	    /* found our subdisk */
		    break;
	    }
	    sprintf(newname, "%s.s%d", plex.name, sdno);
	    vinum_rename_2(sd.name, newname);
	    break;

	case plex_object:
	    get_plex_info(&plex, msg.index);
	    get_volume_info(&vol, plex.volno);
	    for (plexno = 0; plexno < vol.plexes; plexno++) {
		if (vol.plex[plexno] == msg.index)	    /* found our subdisk */
		    break;
	    }
	    sprintf(newname, "%s.p%d", vol.name, plexno);
	    vinum_rename_2(plex.name, newname);		    /* this may recurse */
	    break;

	default:					    /* can't get here */
	}
    }
}

/* Detach a subdisk from a plex, or a plex from a volume.
 * detach subdisk plex [rename]
 * detach plex volume [rename]
 */
void 
vinum_detach(int argc, char *argv[], char *argv0[])
{
    struct vinum_ioctl_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    if ((argc < 1)
	|| (argc > 2)) {
	fprintf(stderr,
	    "Usage: \tdetach <subdisk> [rename]\n"
	    "\tdetach <plex> [rename]\n");
	return;
    }
    if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
	perror("Can't get vinum config");
	return;
    }
    msg.index = find_object(argv[0], &msg.type);	    /* find the object to detach */
    msg.force = force;					    /* did we specify the use of force? */
    msg.rename = 0;					    /* don't specify new name */
    msg.recurse = recurse;				    /* but recurse if we have to */

    /* XXX are we going to keep this?
     * Don't document it yet, since the
     * kernel side of things doesn't
     * implement it */
    if (argc == 2) {
	if (!strcmp(argv[1], "rename"))
	    msg.rename = 1;				    /* do renaming */
	else {
	    fprintf(stderr, "Unknown attribute: %s\n", argv[1]);
	    return;
	}
    }
    if ((msg.type != sd_object)
	&& (msg.type != plex_object)) {
	fprintf(stderr, "Can only detach subdisks and plexes\n");
	return;
    }
    ioctl(superdev, VINUM_DETACH, &msg);
    if (reply->error != 0)
	fprintf(stderr,
	    "Can't detach %s: %s (%d)\n",
	    argv[0],
	    reply->msg[0] ? reply->msg : strerror(reply->error),
	    reply->error);
}

static void 
dorename(struct vinum_rename_msg *msg, const char *oldname, const char *name, int maxlen)
{
    struct _ioctl_reply *reply = (struct _ioctl_reply *) msg;

    if (strlen(name) > maxlen) {
	fprintf(stderr, "%s is too long\n", name);
	return;
    }
    strcpy(msg->newname, name);
    ioctl(superdev, VINUM_RENAME, msg);
    if (reply->error != 0)
	fprintf(stderr,
	    "Can't rename %s to %s: %s (%d)\n",
	    oldname,
	    name,
	    reply->msg[0] ? reply->msg : strerror(reply->error),
	    reply->error);
}

/* Rename an object:
 * rename <object> "newname"
 */
void 
vinum_rename_2(char *oldname, char *newname)
{
    struct vinum_rename_msg msg;
    int volno;
    int plexno;

    msg.index = find_object(oldname, &msg.type);	    /* find the object to rename */
    msg.recurse = recurse;

    /* Ugh.  Determine how long the name may be */
    switch (msg.type) {
    case drive_object:
	dorename(&msg, oldname, newname, MAXDRIVENAME);
	break;

    case sd_object:
	dorename(&msg, oldname, newname, MAXSDNAME);
	break;

    case plex_object:
	plexno = msg.index;
	dorename(&msg, oldname, newname, MAXPLEXNAME);
	if (recurse) {
	    int sdno;

	    get_plex_info(&plex, plexno);		    /* find out who we are */
	    msg.type = sd_object;
	    for (sdno = 0; sdno < plex.subdisks; sdno++) {
		char sdname[MAXPLEXNAME + 8];

		get_plex_sd_info(&sd, plex.plexno, sdno);   /* get info about the subdisk */
		sprintf(sdname, "%s.s%d", newname, sdno);
		msg.index = sd.sdno;			    /* number of the subdisk */
		dorename(&msg, sd.name, sdname, MAXSDNAME);
	    }
	}
	break;

    case volume_object:
	volno = msg.index;
	dorename(&msg, oldname, newname, MAXVOLNAME);
	if (recurse) {
	    int sdno;
	    int plexno;

	    get_volume_info(&vol, volno);		    /* find out who we are */
	    for (plexno = 0; plexno < vol.plexes; plexno++) {
		char plexname[MAXVOLNAME + 8];

		msg.type = plex_object;
		sprintf(plexname, "%s.p%d", newname, plexno);
		msg.index = vol.plex[plexno];		    /* number of the plex */
		dorename(&msg, plex.name, plexname, MAXPLEXNAME);
		get_plex_info(&plex, vol.plex[plexno]);	    /* find out who we are */
		msg.type = sd_object;
		for (sdno = 0; sdno < plex.subdisks; sdno++) {
		    char sdname[MAXPLEXNAME + 8];

		    get_plex_sd_info(&sd, plex.plexno, sdno); /* get info about the subdisk */
		    sprintf(sdname, "%s.s%d", plexname, sdno);
		    msg.index = sd.sdno;		    /* number of the subdisk */
		    dorename(&msg, sd.name, sdname, MAXSDNAME);
		}
	    }
	}
	break;

    default:
	fprintf(stderr, "%s is not a Vinum object\n", oldname);
	return;
    }
}

void 
vinum_rename(int argc, char *argv[], char *argv0[])
{
    if (argc != 2) {
	fprintf(stderr, "Usage: \trename <object> <new name>\n");
	return;
    }
    if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
	perror("Can't get vinum config");
	return;
    }
    vinum_rename_2(argv[0], argv[1]);
}

#ifdef COMPLETE
/* Replace an object.  Syntax and semantics TBD */
void 
vinum_replace(int argc, char *argv[], char *argv0[])
{
    int maxlen;
    struct vinum_rename_msg msg;
    struct _ioctl_reply *reply = (struct _ioctl_reply *) &msg;

    if (argc != 2) {
	fprintf(stderr, "Usage: \trename <object> <new name>\n");
	return;
    }
    if (ioctl(superdev, VINUM_GETCONFIG, &vinum_conf) < 0) {
	perror("Can't get vinum config");
	return;
    }
    fprintf(stderr, "Not implemented yet\n");
}
#endif
/* Replace an object.  Syntax and semantics TBD */
void 
vinum_replace(int argc, char *argv[], char *argv0[])
{
    fprintf(stderr, "replace function not implemented yet\n");
}