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