/* $NetBSD: blkdev.c,v 1.7 2019/12/27 09:41:49 msaitoh Exp $ */ /* * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Christopher G. Demetriou * for the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Van Jacobson of Lawrence Berkeley Laboratory and Ralph Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)rz.c 8.1 (Berkeley) 6/10/93 */ #include <lib/libsa/stand.h> #include <lib/libkern/libkern.h> #include <sys/param.h> #include <sys/disklabel.h> #include "stand/common/cfe_api.h" #include "stand/common/common.h" #include "blkdev.h" /* * If BOOTXX_FS_TYPE is defined, we'll try to find and use the first * partition with that type mentioned in the disklabel, else default to * using block 0. * * The old boot blocks used to look for a file system starting at block * 0. It's not immediately obvious that change here is necessary or good, * so for now we don't bother looking for the specific type. */ #undef BOOTXX_FS_TYPE int blkdev_is_open; u_int32_t blkdev_part_offset; /* * Since we have only one device, and want to squeeze space, we just * short-circuit devopen() to do the disk open as well. * * Devopen is supposed to decode the string 'fname', open the device, * and make 'file' point to the remaining file name. Since we don't * do any device munging, we can just set *file to fname. */ int devopen(struct open_file *f, const char *fname, char **file) /* file: out */ { #if defined(BOOTXX_FS_TYPE) int i; size_t cnt; char *msg, buf[DEV_BSIZE]; struct disklabel l; #endif /* defined(BOOTXX_FS_TYPE) */ if (blkdev_is_open) { return (EBUSY); } *file = (char *)fname; #if 0 f->f_devdata = NULL; /* no point */ #endif /* Try to read disk label and partition table information. */ blkdev_part_offset = 0; #if defined(BOOTXX_FS_TYPE) i = diskstrategy(NULL, F_READ, (daddr_t)LABELSECTOR, DEV_BSIZE, buf, &cnt); if (i || cnt != DEV_BSIZE) { return (ENXIO); } msg = getdisklabel(buf, &l); if (msg == NULL) { /* * there's a label. find the first partition of the * type we want and use its offset. if none are * found, we just use offset 0. */ for (i = 0; i < l.d_npartitions; i++) { if (l.d_partitions[i].p_fstype == BOOTXX_FS_TYPE) { blkdev_part_offset = l.d_partitions[i].p_offset; break; } } } else { /* just use offset 0; it's already set that way */ } #endif /* defined(BOOTXX_FS_TYPE) */ blkdev_is_open = 1; return (0); } int blkdevstrategy(void *devdata, int rw, daddr_t bn, size_t reqcnt, void *addrvoid, size_t *cnt) /* cnt: out: number of bytes transferred */ { unsigned char *addr = addrvoid; int res; #if !defined(LIBSA_NO_TWIDDLE) twiddle(); #endif /* Partial-block transfers not handled. */ if (reqcnt & (DEV_BSIZE - 1)) { *cnt = 0; return (EINVAL); } res = cfe_readblk(booted_dev_fd,(bn+blkdev_part_offset)*DEV_BSIZE,addr,reqcnt); if (res < 0) return EIO; *cnt = res; return (0); } #if !defined(LIBSA_NO_FS_CLOSE) int blkdevclose(struct open_file *f) { blkdev_is_open = 0; return (0); } #endif /* !defined(LIBSA_NO_FS_CLOSE) */
