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 /*
28*7c478bd9Sstevel@tonic-gate * Checks for a match with the the dump slice.
29*7c478bd9Sstevel@tonic-gate */
30*7c478bd9Sstevel@tonic-gate
31*7c478bd9Sstevel@tonic-gate #include <stdlib.h>
32*7c478bd9Sstevel@tonic-gate #include <stdio.h>
33*7c478bd9Sstevel@tonic-gate #include <unistd.h>
34*7c478bd9Sstevel@tonic-gate #include <string.h>
35*7c478bd9Sstevel@tonic-gate #include <synch.h>
36*7c478bd9Sstevel@tonic-gate #include <sys/param.h>
37*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
38*7c478bd9Sstevel@tonic-gate #include <sys/stat.h>
39*7c478bd9Sstevel@tonic-gate #include <fcntl.h>
40*7c478bd9Sstevel@tonic-gate #include <sys/dumpadm.h>
41*7c478bd9Sstevel@tonic-gate
42*7c478bd9Sstevel@tonic-gate #include "libdiskmgt.h"
43*7c478bd9Sstevel@tonic-gate #include "disks_private.h"
44*7c478bd9Sstevel@tonic-gate
45*7c478bd9Sstevel@tonic-gate /* Cached file descriptor for /dev/dump. */
46*7c478bd9Sstevel@tonic-gate static int dump_fd = -1;
47*7c478bd9Sstevel@tonic-gate
48*7c478bd9Sstevel@tonic-gate static mutex_t dump_lock = DEFAULTMUTEX;
49*7c478bd9Sstevel@tonic-gate
50*7c478bd9Sstevel@tonic-gate /*
51*7c478bd9Sstevel@tonic-gate * Check the dump device against the input slice.
52*7c478bd9Sstevel@tonic-gate */
53*7c478bd9Sstevel@tonic-gate int
inuse_dump(char * slice,nvlist_t * attrs,int * errp)54*7c478bd9Sstevel@tonic-gate inuse_dump(char *slice, nvlist_t *attrs, int *errp)
55*7c478bd9Sstevel@tonic-gate {
56*7c478bd9Sstevel@tonic-gate int found = 0;
57*7c478bd9Sstevel@tonic-gate int fd;
58*7c478bd9Sstevel@tonic-gate char device[MAXPATHLEN];
59*7c478bd9Sstevel@tonic-gate
60*7c478bd9Sstevel@tonic-gate *errp = 0;
61*7c478bd9Sstevel@tonic-gate if (slice == NULL) {
62*7c478bd9Sstevel@tonic-gate return (found);
63*7c478bd9Sstevel@tonic-gate }
64*7c478bd9Sstevel@tonic-gate
65*7c478bd9Sstevel@tonic-gate /*
66*7c478bd9Sstevel@tonic-gate * We only want to open /dev/dump once instead of for every
67*7c478bd9Sstevel@tonic-gate * slice so we cache the open file descriptor. The ioctl
68*7c478bd9Sstevel@tonic-gate * is cheap so we can do that for every slice.
69*7c478bd9Sstevel@tonic-gate */
70*7c478bd9Sstevel@tonic-gate (void) mutex_lock(&dump_lock);
71*7c478bd9Sstevel@tonic-gate
72*7c478bd9Sstevel@tonic-gate if (dump_fd == -1) {
73*7c478bd9Sstevel@tonic-gate if ((dump_fd = open("/dev/dump", O_RDONLY)) >= 0)
74*7c478bd9Sstevel@tonic-gate (void) fcntl(dump_fd, F_SETFD, FD_CLOEXEC);
75*7c478bd9Sstevel@tonic-gate }
76*7c478bd9Sstevel@tonic-gate
77*7c478bd9Sstevel@tonic-gate fd = dump_fd;
78*7c478bd9Sstevel@tonic-gate
79*7c478bd9Sstevel@tonic-gate (void) mutex_unlock(&dump_lock);
80*7c478bd9Sstevel@tonic-gate
81*7c478bd9Sstevel@tonic-gate if (fd != -1) {
82*7c478bd9Sstevel@tonic-gate if (ioctl(fd, DIOCGETDEV, device) != -1) {
83*7c478bd9Sstevel@tonic-gate if (strcmp(slice, device) == 0) {
84*7c478bd9Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_BY,
85*7c478bd9Sstevel@tonic-gate DM_USE_DUMP, errp);
86*7c478bd9Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_NAME,
87*7c478bd9Sstevel@tonic-gate DM_USE_DUMP, errp);
88*7c478bd9Sstevel@tonic-gate found = 1;
89*7c478bd9Sstevel@tonic-gate }
90*7c478bd9Sstevel@tonic-gate }
91*7c478bd9Sstevel@tonic-gate }
92*7c478bd9Sstevel@tonic-gate
93*7c478bd9Sstevel@tonic-gate return (found);
94*7c478bd9Sstevel@tonic-gate }
95