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 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