17c478bdstevel@tonic-gate/*
27c478bdstevel@tonic-gate * CDDL HEADER START
37c478bdstevel@tonic-gate *
47c478bdstevel@tonic-gate * The contents of this file are subject to the terms of the
57c478bdstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
67c478bdstevel@tonic-gate * (the "License").  You may not use this file except in compliance
77c478bdstevel@tonic-gate * with the License.
87c478bdstevel@tonic-gate *
97c478bdstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bdstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
117c478bdstevel@tonic-gate * See the License for the specific language governing permissions
127c478bdstevel@tonic-gate * and limitations under the License.
137c478bdstevel@tonic-gate *
147c478bdstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
157c478bdstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bdstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
177c478bdstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
187c478bdstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bdstevel@tonic-gate *
207c478bdstevel@tonic-gate * CDDL HEADER END
217c478bdstevel@tonic-gate */
227c478bdstevel@tonic-gate/*
237c478bdstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
247c478bdstevel@tonic-gate * Use is subject to license terms.
257c478bdstevel@tonic-gate */
267c478bdstevel@tonic-gate
277c478bdstevel@tonic-gate#pragma ident	"%Z%%M%	%I%	%E% SMI"
287c478bdstevel@tonic-gate
297c478bdstevel@tonic-gate/*
307c478bdstevel@tonic-gate * Checks for a match with the the dump slice.
317c478bdstevel@tonic-gate */
327c478bdstevel@tonic-gate
337c478bdstevel@tonic-gate#include <stdlib.h>
347c478bdstevel@tonic-gate#include <stdio.h>
357c478bdstevel@tonic-gate#include <unistd.h>
367c478bdstevel@tonic-gate#include <string.h>
377c478bdstevel@tonic-gate#include <synch.h>
387c478bdstevel@tonic-gate#include <sys/param.h>
397c478bdstevel@tonic-gate#include <sys/types.h>
407c478bdstevel@tonic-gate#include <sys/stat.h>
417c478bdstevel@tonic-gate#include <fcntl.h>
427c478bdstevel@tonic-gate#include <sys/dumpadm.h>
437c478bdstevel@tonic-gate
447c478bdstevel@tonic-gate#include "libdiskmgt.h"
457c478bdstevel@tonic-gate#include "disks_private.h"
467c478bdstevel@tonic-gate
477c478bdstevel@tonic-gate/* Cached file descriptor for /dev/dump. */
487c478bdstevel@tonic-gatestatic int		dump_fd = -1;
497c478bdstevel@tonic-gate
507c478bdstevel@tonic-gatestatic mutex_t		dump_lock = DEFAULTMUTEX;
517c478bdstevel@tonic-gate
527c478bdstevel@tonic-gate/*
537c478bdstevel@tonic-gate * Check the dump device against the input slice.
547c478bdstevel@tonic-gate */
557c478bdstevel@tonic-gateint
567c478bdstevel@tonic-gateinuse_dump(char *slice, nvlist_t *attrs, int *errp)
577c478bdstevel@tonic-gate{
587c478bdstevel@tonic-gate	int		found = 0;
597c478bdstevel@tonic-gate	int		fd;
607c478bdstevel@tonic-gate	char		device[MAXPATHLEN];
617c478bdstevel@tonic-gate
627c478bdstevel@tonic-gate	*errp = 0;
637c478bdstevel@tonic-gate	if (slice == NULL) {
647c478bdstevel@tonic-gate	    return (found);
657c478bdstevel@tonic-gate	}
667c478bdstevel@tonic-gate
677c478bdstevel@tonic-gate	/*
687c478bdstevel@tonic-gate	 * We only want to open /dev/dump once instead of for every
697c478bdstevel@tonic-gate	 * slice so we cache the open file descriptor.  The ioctl
707c478bdstevel@tonic-gate	 * is cheap so we can do that for every slice.
717c478bdstevel@tonic-gate	 */
727c478bdstevel@tonic-gate	(void) mutex_lock(&dump_lock);
737c478bdstevel@tonic-gate
747c478bdstevel@tonic-gate	if (dump_fd == -1) {
757c478bdstevel@tonic-gate		if ((dump_fd = open("/dev/dump", O_RDONLY)) >= 0)
767c478bdstevel@tonic-gate			(void) fcntl(dump_fd, F_SETFD, FD_CLOEXEC);
777c478bdstevel@tonic-gate	}
787c478bdstevel@tonic-gate
797c478bdstevel@tonic-gate	fd = dump_fd;
807c478bdstevel@tonic-gate
817c478bdstevel@tonic-gate	(void) mutex_unlock(&dump_lock);
827c478bdstevel@tonic-gate
837c478bdstevel@tonic-gate	if (fd != -1) {
847c478bdstevel@tonic-gate		if (ioctl(fd, DIOCGETDEV, device) != -1) {
857c478bdstevel@tonic-gate			if (strcmp(slice, device) == 0) {
867c478bdstevel@tonic-gate				libdiskmgt_add_str(attrs, DM_USED_BY,
877c478bdstevel@tonic-gate				    DM_USE_DUMP, errp);
887c478bdstevel@tonic-gate				libdiskmgt_add_str(attrs, DM_USED_NAME,
897c478bdstevel@tonic-gate				    DM_USE_DUMP, errp);
907c478bdstevel@tonic-gate				found = 1;
917c478bdstevel@tonic-gate			}
927c478bdstevel@tonic-gate		}
937c478bdstevel@tonic-gate	}
947c478bdstevel@tonic-gate
957c478bdstevel@tonic-gate	return (found);
967c478bdstevel@tonic-gate}
97