1 /*- 2 * Copyright (c) 2016 The DragonFly Project 3 * Copyright (c) 2002, 2003 Gordon Tetlow 4 * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5 * Copyright (c) 2014 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * This software was developed by Edward Tomasz Napierala under sponsorship 9 * from the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/types.h> 34 #include <stdint.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 39 typedef int64_t ufs_time_t; 40 typedef int64_t ufs2_daddr_t; 41 #include "../../sys/boot/common/fs.h" 42 43 #include "fstyp.h" 44 45 static const int superblocks[] = SBLOCKSEARCH; 46 47 int 48 fstyp_ufs(FILE *fp, char *label, size_t labelsize) 49 { 50 int sb, superblock; 51 struct fs *fs; 52 53 /* 54 * Walk through the standard places that superblocks hide and look 55 * for UFS magic. If we find magic, then check that the size in the 56 * superblock corresponds to the size of the underlying provider. 57 * Finally, look for a volume label and create an appropriate 58 * provider based on that. 59 */ 60 for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) { 61 fs = (struct fs *)read_buf(fp, superblock, SBLOCKSIZE); 62 if (fs == NULL) 63 continue; 64 /* 65 * Check for magic. We also need to check if file system size is equal 66 * to providers size, because sysinstall(8) used to bogusly put first 67 * partition at offset 0 instead of 16, and glabel/ufs would find file 68 * system on slice instead of partition. 69 */ 70 #ifdef notyet 71 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 && 72 ((pp->mediasize / fs->fs_fsize == fs->fs_old_size) || 73 (pp->mediasize / fs->fs_fsize == fs->fs_providersize))) { 74 /* Valid UFS1. */ 75 } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 && 76 ((pp->mediasize / fs->fs_fsize == fs->fs_size) || 77 (pp->mediasize / fs->fs_fsize == fs->fs_providersize))) { 78 /* Valid UFS2. */ 79 } else { 80 g_free(fs); 81 continue; 82 } 83 #else 84 if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) { 85 /* Valid UFS1. */ 86 } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) { 87 /* Valid UFS2. */ 88 } else { 89 free(fs); 90 continue; 91 } 92 #endif 93 /* 94 * XXX: DragonFly 95 */ 96 if (/* fs->fs_sblockloc != superblock || */ 97 fs->fs_ncg < 1 || 98 fs->fs_bsize < MINBSIZE || 99 (size_t)fs->fs_bsize < sizeof(struct fs)) { 100 free(fs); 101 continue; 102 } 103 104 strlcpy(label, fs->fs_volname, labelsize); 105 106 free(fs); 107 return (0); 108 } 109 110 return (1); 111 } 112