blkdev.c revision 1.1.2.2
1 1.1.2.2 nathanw /* $NetBSD: blkdev.c,v 1.1.2.2 2002/11/11 22:03:30 nathanw Exp $ */ 2 1.1.2.2 nathanw 3 1.1.2.2 nathanw /* 4 1.1.2.2 nathanw * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 5 1.1.2.2 nathanw * 6 1.1.2.2 nathanw * Redistribution and use in source and binary forms, with or without 7 1.1.2.2 nathanw * modification, are permitted provided that the following conditions 8 1.1.2.2 nathanw * are met: 9 1.1.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 10 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer. 11 1.1.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 12 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 13 1.1.2.2 nathanw * documentation and/or other materials provided with the distribution. 14 1.1.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 15 1.1.2.2 nathanw * must display the following acknowledgement: 16 1.1.2.2 nathanw * This product includes software developed by Christopher G. Demetriou 17 1.1.2.2 nathanw * for the NetBSD Project. 18 1.1.2.2 nathanw * 4. The name of the author may not be used to endorse or promote products 19 1.1.2.2 nathanw * derived from this software without specific prior written permission 20 1.1.2.2 nathanw * 21 1.1.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 1.1.2.2 nathanw * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 1.1.2.2 nathanw * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 1.1.2.2 nathanw * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 1.1.2.2 nathanw * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 1.1.2.2 nathanw * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 1.1.2.2 nathanw * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 1.1.2.2 nathanw * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 1.1.2.2 nathanw * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 1.1.2.2 nathanw * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 1.1.2.2 nathanw */ 32 1.1.2.2 nathanw 33 1.1.2.2 nathanw /* 34 1.1.2.2 nathanw * Copyright (c) 1992, 1993 35 1.1.2.2 nathanw * The Regents of the University of California. All rights reserved. 36 1.1.2.2 nathanw * 37 1.1.2.2 nathanw * This code is derived from software contributed to Berkeley by 38 1.1.2.2 nathanw * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. 39 1.1.2.2 nathanw * 40 1.1.2.2 nathanw * Redistribution and use in source and binary forms, with or without 41 1.1.2.2 nathanw * modification, are permitted provided that the following conditions 42 1.1.2.2 nathanw * are met: 43 1.1.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 44 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer. 45 1.1.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 46 1.1.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 47 1.1.2.2 nathanw * documentation and/or other materials provided with the distribution. 48 1.1.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 49 1.1.2.2 nathanw * must display the following acknowledgement: 50 1.1.2.2 nathanw * This product includes software developed by the University of 51 1.1.2.2 nathanw * California, Berkeley and its contributors. 52 1.1.2.2 nathanw * 4. Neither the name of the University nor the names of its contributors 53 1.1.2.2 nathanw * may be used to endorse or promote products derived from this software 54 1.1.2.2 nathanw * without specific prior written permission. 55 1.1.2.2 nathanw * 56 1.1.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 57 1.1.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 58 1.1.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 59 1.1.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 60 1.1.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 61 1.1.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 62 1.1.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 1.1.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 64 1.1.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 65 1.1.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 66 1.1.2.2 nathanw * SUCH DAMAGE. 67 1.1.2.2 nathanw * 68 1.1.2.2 nathanw * @(#)rz.c 8.1 (Berkeley) 6/10/93 69 1.1.2.2 nathanw */ 70 1.1.2.2 nathanw 71 1.1.2.2 nathanw #include <lib/libsa/stand.h> 72 1.1.2.2 nathanw #include <lib/libkern/libkern.h> 73 1.1.2.2 nathanw 74 1.1.2.2 nathanw #include <sys/param.h> 75 1.1.2.2 nathanw #include <sys/disklabel.h> 76 1.1.2.2 nathanw 77 1.1.2.2 nathanw #include "stand/common/cfe_api.h" 78 1.1.2.2 nathanw 79 1.1.2.2 nathanw #include "stand/common/common.h" 80 1.1.2.2 nathanw #include "blkdev.h" 81 1.1.2.2 nathanw 82 1.1.2.2 nathanw /* 83 1.1.2.2 nathanw * If BOOTXX_FS_TYPE is defined, we'll try to find and use the first 84 1.1.2.2 nathanw * partition with that type mentioned in the disklabel, else default to 85 1.1.2.2 nathanw * using block 0. 86 1.1.2.2 nathanw * 87 1.1.2.2 nathanw * The old boot blocks used to look for a file system starting at block 88 1.1.2.2 nathanw * 0. It's not immediately obvious that change here is necessary or good, 89 1.1.2.2 nathanw * so for now we don't bother looking for the specific type. 90 1.1.2.2 nathanw */ 91 1.1.2.2 nathanw #undef BOOTXX_FS_TYPE 92 1.1.2.2 nathanw 93 1.1.2.2 nathanw int blkdev_is_open; 94 1.1.2.2 nathanw u_int32_t blkdev_part_offset; 95 1.1.2.2 nathanw 96 1.1.2.2 nathanw /* 97 1.1.2.2 nathanw * Since we have only one device, and want to squeeze space, we just 98 1.1.2.2 nathanw * short-circuit devopen() to do the disk open as well. 99 1.1.2.2 nathanw * 100 1.1.2.2 nathanw * Devopen is supposed to decode the string 'fname', open the device, 101 1.1.2.2 nathanw * and make 'file' point to the remaining file name. Since we don't 102 1.1.2.2 nathanw * do any device munging, we can just set *file to fname. 103 1.1.2.2 nathanw */ 104 1.1.2.2 nathanw int 105 1.1.2.2 nathanw devopen(f, fname, file) 106 1.1.2.2 nathanw struct open_file *f; 107 1.1.2.2 nathanw const char *fname; 108 1.1.2.2 nathanw char **file; /* out */ 109 1.1.2.2 nathanw { 110 1.1.2.2 nathanw #if defined(BOOTXX_FS_TYPE) 111 1.1.2.2 nathanw int i; 112 1.1.2.2 nathanw size_t cnt; 113 1.1.2.2 nathanw char *msg, buf[DEV_BSIZE]; 114 1.1.2.2 nathanw struct disklabel l; 115 1.1.2.2 nathanw #endif /* defined(BOOTXX_FS_TYPE) */ 116 1.1.2.2 nathanw 117 1.1.2.2 nathanw if (blkdev_is_open) { 118 1.1.2.2 nathanw return (EBUSY); 119 1.1.2.2 nathanw } 120 1.1.2.2 nathanw 121 1.1.2.2 nathanw *file = (char *)fname; 122 1.1.2.2 nathanw 123 1.1.2.2 nathanw #if 0 124 1.1.2.2 nathanw f->f_devdata = NULL; /* no point */ 125 1.1.2.2 nathanw #endif 126 1.1.2.2 nathanw 127 1.1.2.2 nathanw /* Try to read disk label and partition table information. */ 128 1.1.2.2 nathanw blkdev_part_offset = 0; 129 1.1.2.2 nathanw #if defined(BOOTXX_FS_TYPE) 130 1.1.2.2 nathanw 131 1.1.2.2 nathanw i = diskstrategy(NULL, F_READ, 132 1.1.2.2 nathanw (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); 133 1.1.2.2 nathanw if (i || cnt != DEV_BSIZE) { 134 1.1.2.2 nathanw return (ENXIO); 135 1.1.2.2 nathanw } 136 1.1.2.2 nathanw msg = getdisklabel(buf, &l); 137 1.1.2.2 nathanw if (msg == NULL) { 138 1.1.2.2 nathanw /* 139 1.1.2.2 nathanw * there's a label. find the first partition of the 140 1.1.2.2 nathanw * type we want and use its offset. if none are 141 1.1.2.2 nathanw * found, we just use offset 0. 142 1.1.2.2 nathanw */ 143 1.1.2.2 nathanw for (i = 0; i < l.d_npartitions; i++) { 144 1.1.2.2 nathanw if (l.d_partitions[i].p_fstype == BOOTXX_FS_TYPE) { 145 1.1.2.2 nathanw blkdev_part_offset = l.d_partitions[i].p_offset; 146 1.1.2.2 nathanw break; 147 1.1.2.2 nathanw } 148 1.1.2.2 nathanw } 149 1.1.2.2 nathanw } else { 150 1.1.2.2 nathanw /* just use offset 0; it's already set that way */ 151 1.1.2.2 nathanw } 152 1.1.2.2 nathanw #endif /* defined(BOOTXX_FS_TYPE) */ 153 1.1.2.2 nathanw 154 1.1.2.2 nathanw blkdev_is_open = 1; 155 1.1.2.2 nathanw return (0); 156 1.1.2.2 nathanw } 157 1.1.2.2 nathanw 158 1.1.2.2 nathanw int 159 1.1.2.2 nathanw blkdevstrategy(devdata, rw, bn, reqcnt, addrvoid, cnt) 160 1.1.2.2 nathanw void *devdata; 161 1.1.2.2 nathanw int rw; 162 1.1.2.2 nathanw daddr_t bn; 163 1.1.2.2 nathanw size_t reqcnt; 164 1.1.2.2 nathanw void *addrvoid; 165 1.1.2.2 nathanw size_t *cnt; /* out: number of bytes transfered */ 166 1.1.2.2 nathanw { 167 1.1.2.2 nathanw char *addr = addrvoid; 168 1.1.2.2 nathanw int res; 169 1.1.2.2 nathanw 170 1.1.2.2 nathanw twiddle(); 171 1.1.2.2 nathanw 172 1.1.2.2 nathanw /* Partial-block transfers not handled. */ 173 1.1.2.2 nathanw if (reqcnt & (DEV_BSIZE - 1)) { 174 1.1.2.2 nathanw *cnt = 0; 175 1.1.2.2 nathanw return (EINVAL); 176 1.1.2.2 nathanw } 177 1.1.2.2 nathanw res = cfe_readblk(booted_dev_fd,(bn+blkdev_part_offset)*DEV_BSIZE,addr,reqcnt); 178 1.1.2.2 nathanw if (res < 0) return EIO; 179 1.1.2.2 nathanw 180 1.1.2.2 nathanw *cnt = res; 181 1.1.2.2 nathanw return (0); 182 1.1.2.2 nathanw } 183 1.1.2.2 nathanw 184 1.1.2.2 nathanw #if !defined(LIBSA_NO_FS_CLOSE) 185 1.1.2.2 nathanw int 186 1.1.2.2 nathanw blkdevclose(struct open_file *f) 187 1.1.2.2 nathanw { 188 1.1.2.2 nathanw 189 1.1.2.2 nathanw blkdev_is_open = 0; 190 1.1.2.2 nathanw return (0); 191 1.1.2.2 nathanw } 192 1.1.2.2 nathanw #endif /* !defined(LIBSA_NO_FS_CLOSE) */ 193
Indexes created Wed Oct 01 15:09:59 GMT 2025