unixdev.c revision 1.2.6.1
1 /* $NetBSD: unixdev.c,v 1.2.6.1 2012/02/18 07:33:52 mrg Exp $ */ 2 /* $OpenBSD: unixdev.c,v 1.6 2007/06/16 00:26:33 deraadt Exp $ */ 3 4 /* 5 * Copyright (c) 1996-1998 Michael Shalayeff 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 */ 30 31 #include <sys/param.h> 32 #include <sys/reboot.h> 33 34 #include "boot.h" 35 #include "bootinfo.h" 36 #include "disk.h" 37 #include "unixdev.h" 38 #include "compat_linux.h" 39 40 static struct btinfo_bootdisk bi_disk; 41 42 int 43 unixstrategy(void *devdata, int rw, daddr_t blk, size_t size, void *buf, 44 size_t *rsize) 45 { 46 off_t off; 47 int fd = (int)devdata; 48 int rc = 0; 49 50 #ifdef UNIX_DEBUG 51 printf("unixstrategy: %s %d bytes @ %d\n", 52 ((rw == F_READ) ? "reading" : "writing"), (int)size, (int)blk); 53 #endif 54 55 off = (off_t)blk * DEV_BSIZE; 56 if ((rc = ulseek(fd, off, SEEK_SET)) >= 0) 57 rc = (rw == F_READ) ? uread(fd, buf, size) : 58 uwrite(fd, buf, size); 59 60 if (rc >= 0) { 61 *rsize = (size_t)rc; 62 rc = 0; 63 } else 64 rc = errno; 65 return rc; 66 } 67 68 int 69 unixopen(struct open_file *f, ...) 70 { 71 va_list ap; 72 char path[PATH_MAX]; 73 struct diskinfo *dip; 74 char *devname; 75 const char *fname; 76 u_int unit, partition; 77 int dospart; 78 79 va_start(ap, f); 80 devname = va_arg(ap, char *); 81 unit = va_arg(ap, u_int); 82 partition = va_arg(ap, u_int); 83 fname = va_arg(ap, char *); 84 va_end(ap); 85 86 #ifdef UNIX_DEBUG 87 printf("%s: devname=%s, unit=%d, partition=%d, fname=%s\n", 88 __func__, devname, unit, partition, fname); 89 #endif 90 91 f->f_devdata = NULL; 92 93 /* Find device. */ 94 dip = dkdevice(devname, unit); 95 if (dip == NULL) 96 return ENOENT; 97 98 /* Try for disklabel again (might be removable media). */ 99 if (dip->bios_info.flags & BDI_BADLABEL) { 100 const char *st = bios_getdisklabel(&dip->bios_info, 101 &dip->disklabel); 102 #ifdef UNIX_DEBUG 103 if (debug && st) 104 printf("%s\n", st); 105 #endif 106 if (!st) { 107 dip->bios_info.flags &= ~BDI_BADLABEL; 108 dip->bios_info.flags |= BDI_GOODLABEL; 109 } else 110 return ERDLAB; 111 } 112 113 dospart = bios_getdospart(&dip->bios_info); 114 bios_devpath(dip->bios_info.bios_number, dospart, path); 115 f->f_devdata = (void *)uopen(path, LINUX_O_RDONLY); 116 if ((int)f->f_devdata == -1) 117 return errno; 118 119 bi_disk.biosdev = dip->bios_info.bios_number; 120 bi_disk.partition = partition; 121 bi_disk.labelsector = 122 dip->disklabel.d_partitions[partition].p_offset + LABELSECTOR; 123 bi_disk.label.type = dip->disklabel.d_type; 124 memcpy(bi_disk.label.packname, dip->disklabel.d_packname, 16); 125 bi_disk.label.checksum = dip->disklabel.d_checksum; 126 BI_ADD(&bi_disk, BTINFO_BOOTDISK, sizeof(bi_disk)); 127 128 return 0; 129 } 130 131 int 132 unixpathopen(struct open_file *f, ...) 133 { 134 va_list ap; 135 char *devname; 136 const char *fname; 137 u_int unit, partition; 138 139 va_start(ap, f); 140 devname = va_arg(ap, char *); 141 unit = va_arg(ap, u_int); 142 partition = va_arg(ap, u_int); 143 fname = va_arg(ap, char *); 144 va_end(ap); 145 146 #ifdef UNIX_DEBUG 147 printf("%s: devname=%s, unit=%d, partition=%d, fname=%s\n", 148 __func__, devname, unit, partition, fname); 149 #endif 150 151 if (fname == NULL || fname[0] == '\0') 152 return EINVAL; 153 154 f->f_devdata = (void *)uopen(fname, LINUX_O_RDONLY); 155 if ((int)f->f_devdata == -1) 156 return errno; 157 158 bi_del(BTINFO_BOOTDISK); 159 160 return 0; 161 } 162 163 int 164 unixclose(struct open_file *f) 165 { 166 167 #ifdef UNIX_DEBUG 168 printf("%s\n", __func__); 169 #endif 170 171 return uclose((int)f->f_devdata); 172 } 173 174 int 175 unixioctl(struct open_file *f, u_long cmd, void *data) 176 { 177 178 #ifdef UNIX_DEBUG 179 printf("%s: cmd=0x%08lx\n", __func__, cmd); 180 #endif 181 182 return uioctl((int)f->f_devdata, cmd, data); 183 } 184 185 off_t 186 ulseek(int fd, off_t off, int wh) 187 { 188 extern long ulseek32(int, long, int); 189 off_t r; 190 191 /* XXX only SEEK_SET is used, so anything else can fail for now. */ 192 193 if (wh == SEEK_SET) { 194 if (ulseek32(fd, 0, SEEK_SET) != 0) 195 return -1; 196 while (off > OFFT_OFFSET_MAX) { 197 off -= OFFT_OFFSET_MAX; 198 if (ulseek32(fd, OFFT_OFFSET_MAX, SEEK_CUR) < 0 && 199 errno != LINUX_EOVERFLOW) 200 return -1; 201 } 202 r = ulseek32(fd, (long)off, SEEK_CUR); 203 if (r == -1 && errno == LINUX_EOVERFLOW) 204 r = off; 205 } else 206 r = ulseek32(fd, (long)off, wh); 207 208 return r; 209 } 210
Indexes created Tue Sep 30 20:09:53 GMT 2025