1 /* $NetBSD: ufs_disksubr.c,v 1.7 2023/10/13 16:10:24 tsutsui Exp $ */ 2 3 /* 4 * Copyright (c) 1992 OMRON Corporation. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * OMRON Corporation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)ufs_disksubr.c 8.1 (Berkeley) 6/10/93 38 */ 39 /* 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * OMRON Corporation. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)ufs_disksubr.c 8.1 (Berkeley) 6/10/93 71 */ 72 73 /* 74 * ufs_disksubr.c -- disk utility routines 75 * by A.Fujita, FEB-26-1992 76 */ 77 78 #include <sys/param.h> 79 #include <sys/disklabel.h> 80 81 #include <lib/libkern/libkern.h> 82 83 #include <luna68k/stand/boot/samachdep.h> 84 #include <luna68k/stand/boot/scsireg.h> 85 86 /* 87 * Attempt to read a disk label from a device 88 * using the indicated strategy routine. 89 * The label must be partly set up before this: 90 * secpercyl and anything required in the strategy routine 91 * (e.g., sector size) must be filled in before calling us. 92 * Returns null on success and an error string on failure. 93 */ 94 char * 95 readdisklabel(int ctlr, int id, struct disklabel *lp) 96 { 97 uint8_t *bp = lbl_buff; 98 struct disklabel *dlp; 99 char *msg = NULL; 100 static struct scsi_generic_cdb cdb = { 101 6, 102 { CMD_READ, 0, 0, 0, 1, 0 } 103 }; 104 105 if (lp->d_secperunit == 0) 106 lp->d_secperunit = 0x1fffffff; 107 lp->d_npartitions = 1; 108 if (lp->d_partitions[0].p_size == 0) 109 lp->d_partitions[0].p_size = 0x1fffffff; 110 lp->d_partitions[0].p_offset = 0; 111 112 if (scsi_immed_command(ctlr, id, 0, &cdb, bp, DEV_BSIZE) != 0) { 113 msg = "I/O error"; 114 } else { 115 for (dlp = (struct disklabel *)bp; 116 dlp <= (struct disklabel *)(bp + DEV_BSIZE - sizeof(*dlp)); 117 dlp = (struct disklabel *)((char *)dlp + sizeof(long))) { 118 if (dlp->d_magic != DISKMAGIC || 119 dlp->d_magic2 != DISKMAGIC) { 120 if (msg == NULL) 121 msg = "no disk label"; 122 } else if (dlp->d_npartitions > MAXPARTITIONS || 123 dkcksum(dlp) != 0) 124 msg = "disk label corrupted"; 125 else { 126 *lp = *dlp; 127 msg = NULL; 128 break; 129 } 130 } 131 } 132 133 return msg; 134 } 135
Indexes created Sat Sep 20 22:09:52 GMT 2025