1 /* 2 * Copyright (c) 2010 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Alex Hornung <ahornung@gmail.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include "libfsid.h" 36 37 #include <vfs/hammer/hammer_disk.h> 38 39 static char buffer[HAMMER_BUFSIZE]; 40 41 fsid_t 42 hammer_probe(const char *dev) 43 { 44 static struct hammer_volume_ondisk *fs; 45 46 if (fsid_dev_read(dev, 0L, sizeof(buffer), buffer) != 0) 47 return FSID_UNKNOWN; 48 49 fs = (struct hammer_volume_ondisk *)&buffer; 50 51 if (fs->vol_signature != HAMMER_FSBUF_VOLUME) 52 return FSID_UNKNOWN; 53 54 return FSID_HAMMER; 55 } 56 57 char * 58 hammer_volname(const char *dev) 59 { 60 static struct hammer_volume_ondisk *fs; 61 62 if (fsid_dev_read(dev, 0L, sizeof(buffer), buffer) != 0) 63 return NULL; 64 65 fs = (struct hammer_volume_ondisk *)&buffer; 66 67 if (fs->vol_signature != HAMMER_FSBUF_VOLUME || 68 fs->vol_label[0] == '\0') 69 return NULL; 70 71 fs->vol_label[sizeof(fs->vol_label) - 1] = '\0'; 72 73 return fs->vol_label; 74 } 75 76