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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Checks for a match with the the dump slice.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <synch.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/dumpadm.h>
#include "libdiskmgt.h"
#include "disks_private.h"
/* Cached file descriptor for /dev/dump. */
static int dump_fd = -1;
static mutex_t dump_lock = DEFAULTMUTEX;
/*
* Check the dump device against the input slice.
*/
int
inuse_dump(char *slice, nvlist_t *attrs, int *errp)
{
int found = 0;
int fd;
char device[MAXPATHLEN];
*errp = 0;
if (slice == NULL) {
return (found);
}
/*
* We only want to open /dev/dump once instead of for every
* slice so we cache the open file descriptor. The ioctl
* is cheap so we can do that for every slice.
*/
(void) mutex_lock(&dump_lock);
if (dump_fd == -1) {
if ((dump_fd = open("/dev/dump", O_RDONLY)) >= 0)
(void) fcntl(dump_fd, F_SETFD, FD_CLOEXEC);
}
fd = dump_fd;
(void) mutex_unlock(&dump_lock);
if (fd != -1) {
if (ioctl(fd, DIOCGETDEV, device) != -1) {
if (strcmp(slice, device) == 0) {
libdiskmgt_add_str(attrs, DM_USED_BY,
DM_USE_DUMP, errp);
libdiskmgt_add_str(attrs, DM_USED_NAME,
DM_USE_DUMP, errp);
found = 1;
}
}
}
return (found);
}
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