1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*7c478bd9Sstevel@tonic-gate 
29*7c478bd9Sstevel@tonic-gate /*
30*7c478bd9Sstevel@tonic-gate  * Checks for a match with the the dump slice.
31*7c478bd9Sstevel@tonic-gate  */
32*7c478bd9Sstevel@tonic-gate 
33*7c478bd9Sstevel@tonic-gate #include <stdlib.h>
34*7c478bd9Sstevel@tonic-gate #include <stdio.h>
35*7c478bd9Sstevel@tonic-gate #include <unistd.h>
36*7c478bd9Sstevel@tonic-gate #include <string.h>
37*7c478bd9Sstevel@tonic-gate #include <synch.h>
38*7c478bd9Sstevel@tonic-gate #include <sys/param.h>
39*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
40*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
41*7c478bd9Sstevel@tonic-gate #include <fcntl.h>
42*7c478bd9Sstevel@tonic-gate #include <sys/dumpadm.h>
43*7c478bd9Sstevel@tonic-gate 
44*7c478bd9Sstevel@tonic-gate #include "libdiskmgt.h"
45*7c478bd9Sstevel@tonic-gate #include "disks_private.h"
46*7c478bd9Sstevel@tonic-gate 
47*7c478bd9Sstevel@tonic-gate /* Cached file descriptor for /dev/dump. */
48*7c478bd9Sstevel@tonic-gate static int		dump_fd = -1;
49*7c478bd9Sstevel@tonic-gate 
50*7c478bd9Sstevel@tonic-gate static mutex_t		dump_lock = DEFAULTMUTEX;
51*7c478bd9Sstevel@tonic-gate 
52*7c478bd9Sstevel@tonic-gate /*
53*7c478bd9Sstevel@tonic-gate  * Check the dump device against the input slice.
54*7c478bd9Sstevel@tonic-gate  */
55*7c478bd9Sstevel@tonic-gate int
inuse_dump(char * slice,nvlist_t * attrs,int * errp)56*7c478bd9Sstevel@tonic-gate inuse_dump(char *slice, nvlist_t *attrs, int *errp)
57*7c478bd9Sstevel@tonic-gate {
58*7c478bd9Sstevel@tonic-gate 	int		found = 0;
59*7c478bd9Sstevel@tonic-gate 	int		fd;
60*7c478bd9Sstevel@tonic-gate 	char		device[MAXPATHLEN];
61*7c478bd9Sstevel@tonic-gate 
62*7c478bd9Sstevel@tonic-gate 	*errp = 0;
63*7c478bd9Sstevel@tonic-gate 	if (slice == NULL) {
64*7c478bd9Sstevel@tonic-gate 	    return (found);
65*7c478bd9Sstevel@tonic-gate 	}
66*7c478bd9Sstevel@tonic-gate 
67*7c478bd9Sstevel@tonic-gate 	/*
68*7c478bd9Sstevel@tonic-gate 	 * We only want to open /dev/dump once instead of for every
69*7c478bd9Sstevel@tonic-gate 	 * slice so we cache the open file descriptor.  The ioctl
70*7c478bd9Sstevel@tonic-gate 	 * is cheap so we can do that for every slice.
71*7c478bd9Sstevel@tonic-gate 	 */
72*7c478bd9Sstevel@tonic-gate 	(void) mutex_lock(&dump_lock);
73*7c478bd9Sstevel@tonic-gate 
74*7c478bd9Sstevel@tonic-gate 	if (dump_fd == -1) {
75*7c478bd9Sstevel@tonic-gate 		if ((dump_fd = open("/dev/dump", O_RDONLY)) >= 0)
76*7c478bd9Sstevel@tonic-gate 			(void) fcntl(dump_fd, F_SETFD, FD_CLOEXEC);
77*7c478bd9Sstevel@tonic-gate 	}
78*7c478bd9Sstevel@tonic-gate 
79*7c478bd9Sstevel@tonic-gate 	fd = dump_fd;
80*7c478bd9Sstevel@tonic-gate 
81*7c478bd9Sstevel@tonic-gate 	(void) mutex_unlock(&dump_lock);
82*7c478bd9Sstevel@tonic-gate 
83*7c478bd9Sstevel@tonic-gate 	if (fd != -1) {
84*7c478bd9Sstevel@tonic-gate 		if (ioctl(fd, DIOCGETDEV, device) != -1) {
85*7c478bd9Sstevel@tonic-gate 			if (strcmp(slice, device) == 0) {
86*7c478bd9Sstevel@tonic-gate 				libdiskmgt_add_str(attrs, DM_USED_BY,
87*7c478bd9Sstevel@tonic-gate 				    DM_USE_DUMP, errp);
88*7c478bd9Sstevel@tonic-gate 				libdiskmgt_add_str(attrs, DM_USED_NAME,
89*7c478bd9Sstevel@tonic-gate 				    DM_USE_DUMP, errp);
90*7c478bd9Sstevel@tonic-gate 				found = 1;
91*7c478bd9Sstevel@tonic-gate 			}
92*7c478bd9Sstevel@tonic-gate 		}
93*7c478bd9Sstevel@tonic-gate 	}
94*7c478bd9Sstevel@tonic-gate 
95*7c478bd9Sstevel@tonic-gate 	return (found);
96*7c478bd9Sstevel@tonic-gate }
97