blkdev.c revision 1.5
1 /* $NetBSD: blkdev.c,v 1.5 2003/08/07 16:26:34 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)rz.c 8.1 (Berkeley) 6/10/93 65 */ 66 67 #include <lib/libsa/stand.h> 68 #include <lib/libkern/libkern.h> 69 70 #include <sys/param.h> 71 #include <sys/disklabel.h> 72 73 #include <machine/prom.h> 74 75 #include "stand/common/common.h" 76 #include "blkdev.h" 77 78 #define RF_PROTECTED_SECTORS 64 /* XXX refer to <.../rf_optnames.h> */ 79 80 81 /* 82 * If BOOTXX_FS_TYPE is defined, we'll try to find and use the first 83 * partition with that type mentioned in the disklabel, else default to 84 * using block 0. 85 * 86 * The old boot blocks used to look for a file system starting at block 87 * 0. It's not immediately obvious that change here is necessary or good, 88 * so for now we don't bother looking for the specific type. 89 * 90 * However, for filesystem support on RAID1 sets we use a subset of the 91 * BOOTXX_FS_TYPE support. 92 */ 93 #if defined(BOOTXX_RAID1_SUPPORT) 94 #define BOOTXX_FS_TYPE 95 #else 96 #undef BOOTXX_FS_TYPE 97 #endif 98 99 int blkdev_is_open; 100 u_int32_t blkdev_part_offset; 101 102 /* 103 * Since we have only one device, and want to squeeze space, we just 104 * short-circuit devopen() to do the disk open as well. 105 * 106 * Devopen is supposed to decode the string 'fname', open the device, 107 * and make 'file' point to the remaining file name. Since we don't 108 * do any device munging, we can just set *file to fname. 109 */ 110 int 111 devopen(f, fname, file) 112 struct open_file *f; 113 const char *fname; 114 char **file; /* out */ 115 { 116 #if defined(BOOTXX_FS_TYPE) 117 int i; 118 size_t cnt; 119 char *msg, buf[DEV_BSIZE]; 120 struct disklabel l; 121 #endif /* defined(BOOTXX_FS_TYPE) */ 122 123 if (blkdev_is_open) 124 return (EBUSY); 125 126 *file = (char *)fname; 127 128 #if 0 129 f->f_devdata = NULL; /* no point */ 130 #endif 131 132 /* Try to read disk label and partition table information. */ 133 blkdev_part_offset = 0; 134 #if defined(BOOTXX_FS_TYPE) 135 i = blkdevstrategy(NULL, F_READ, 136 (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 137 if (i || cnt != DEV_BSIZE) { 138 return (ENXIO); 139 } 140 msg = getdisklabel(buf, &l); 141 if (msg == NULL) { 142 #if defined(BOOTXX_RAID1_SUPPORT) 143 if (l.d_partitions[0].p_fstype == FS_RAID) { 144 blkdev_part_offset = RF_PROTECTED_SECTORS; 145 } 146 #else 147 /* 148 * there's a label. find the first partition of the 149 * type we want and use its offset. if none are 150 * found, we just use offset 0. 151 */ 152 for (i = 0; i < l.d_npartitions; i++) { 153 if (l.d_partitions[i].p_fstype == BOOTXX_FS_TYPE) { 154 blkdev_part_offset = l.d_partitions[i].p_offset; 155 break; 156 } 157 } 158 #endif 159 } else { 160 /* just use offset 0; it's already set that way */ 161 } 162 #endif /* defined(BOOTXX_FS_TYPE) */ 163 164 blkdev_is_open = 1; 165 return (0); 166 } 167 168 int 169 blkdevstrategy(devdata, rw, bn, reqcnt, addrvoid, cnt) 170 void *devdata; 171 int rw; 172 daddr_t bn; 173 size_t reqcnt; 174 void *addrvoid; 175 size_t *cnt; /* out: number of bytes transfered */ 176 { 177 char *addr = addrvoid; 178 prom_return_t ret; 179 180 if ((reqcnt & 0xffffff) != reqcnt || 181 reqcnt == 0) 182 asm("call_pal 0"); 183 184 twiddle(); 185 186 /* Partial-block transfers not handled. */ 187 if (reqcnt & (DEV_BSIZE - 1)) { 188 *cnt = 0; 189 return (EINVAL); 190 } 191 192 ret.bits = prom_read(booted_dev_fd, reqcnt, addr, 193 bn + blkdev_part_offset); 194 if (ret.u.status) 195 return (EIO); 196 *cnt = ret.u.retval; 197 return (0); 198 } 199 200 #if !defined(LIBSA_NO_FS_CLOSE) 201 int 202 blkdevclose(struct open_file *f) 203 { 204 205 blkdev_is_open = 0; 206 return (0); 207 } 208 #endif /* !defined(LIBSA_NO_FS_CLOSE) */ 209
Indexes created Tue Sep 23 22:09:46 GMT 2025