diskprobe.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: diskprobe.c,v 1.1.2.2 2009/03/03 18:29:50 skrll Exp $ */ 2 1.1.2.2 skrll /* $OpenBSD: diskprobe.c,v 1.3 2006/10/13 00:00:55 krw Exp $ */ 3 1.1.2.2 skrll 4 1.1.2.2 skrll /* 5 1.1.2.2 skrll * Copyright (c) 1997 Tobias Weingartner 6 1.1.2.2 skrll * All rights reserved. 7 1.1.2.2 skrll * 8 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 9 1.1.2.2 skrll * modification, are permitted provided that the following conditions 10 1.1.2.2 skrll * are met: 11 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 12 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 13 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 14 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 15 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 16 1.1.2.2 skrll * 17 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 1.1.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 1.1.2.2 skrll * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 1.1.2.2 skrll * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 1.1.2.2 skrll * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 1.1.2.2 skrll * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 1.1.2.2 skrll * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 1.1.2.2 skrll * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 1.1.2.2 skrll * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 1.1.2.2 skrll * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 1.1.2.2 skrll * SUCH DAMAGE. 28 1.1.2.2 skrll * 29 1.1.2.2 skrll */ 30 1.1.2.2 skrll 31 1.1.2.2 skrll /* We want the disk type names from disklabel.h */ 32 1.1.2.2 skrll #undef DKTYPENAMES 33 1.1.2.2 skrll 34 1.1.2.2 skrll #include <sys/param.h> 35 1.1.2.2 skrll #include <sys/bootblock.h> 36 1.1.2.2 skrll #include <sys/disklabel.h> 37 1.1.2.2 skrll #include <sys/queue.h> 38 1.1.2.2 skrll #include <sys/reboot.h> 39 1.1.2.2 skrll 40 1.1.2.2 skrll #include "boot.h" 41 1.1.2.2 skrll #include "disk.h" 42 1.1.2.2 skrll #include "unixdev.h" 43 1.1.2.2 skrll #include "compat_linux.h" 44 1.1.2.2 skrll 45 1.1.2.2 skrll /* Disk spin-up wait timeout. */ 46 1.1.2.2 skrll static u_int timeout = 10; 47 1.1.2.2 skrll 48 1.1.2.2 skrll /* Local Prototypes */ 49 1.1.2.2 skrll static void hardprobe(char *buf, size_t bufsiz); 50 1.1.2.2 skrll 51 1.1.2.2 skrll /* List of disk devices we found/probed */ 52 1.1.2.2 skrll struct disklist_lh disklist; 53 1.1.2.2 skrll 54 1.1.2.2 skrll static char disk_devname[MAXDEVNAME]; 55 1.1.2.2 skrll 56 1.1.2.2 skrll /* 57 1.1.2.2 skrll * Probe for all hard disks. 58 1.1.2.2 skrll */ 59 1.1.2.2 skrll static void 60 1.1.2.2 skrll hardprobe(char *buf, size_t bufsiz) 61 1.1.2.2 skrll { 62 1.1.2.2 skrll /* XXX probe disks in this order */ 63 1.1.2.2 skrll static const int order[] = { 0x80, 0x82, 0x00 }; 64 1.1.2.2 skrll char devname[MAXDEVNAME]; 65 1.1.2.2 skrll struct diskinfo *dip; 66 1.1.2.2 skrll u_int disk = 0; 67 1.1.2.2 skrll u_int hd_disk = 0; 68 1.1.2.2 skrll u_int mmcd_disk = 0; 69 1.1.2.2 skrll uint unit = 0; 70 1.1.2.2 skrll int first = 1; 71 1.1.2.2 skrll int i; 72 1.1.2.2 skrll 73 1.1.2.2 skrll buf[0] = '\0'; 74 1.1.2.2 skrll 75 1.1.2.2 skrll /* Hard disks */ 76 1.1.2.2 skrll for (i = 0; i < __arraycount(order); i++) { 77 1.1.2.2 skrll dip = alloc(sizeof(struct diskinfo)); 78 1.1.2.2 skrll memset(dip, 0, sizeof(*dip)); 79 1.1.2.2 skrll 80 1.1.2.2 skrll if (bios_getdiskinfo(order[i], &dip->bios_info) != NULL) { 81 1.1.2.2 skrll dealloc(dip, 0); 82 1.1.2.2 skrll continue; 83 1.1.2.2 skrll } 84 1.1.2.2 skrll 85 1.1.2.2 skrll bios_devname(order[i], devname, sizeof(devname)); 86 1.1.2.2 skrll if (order[i] & 0x80) { 87 1.1.2.2 skrll unit = hd_disk; 88 1.1.2.2 skrll snprintf(dip->devname, sizeof(dip->devname), "%s%d", 89 1.1.2.2 skrll devname, hd_disk++); 90 1.1.2.2 skrll } else { 91 1.1.2.2 skrll unit = mmcd_disk; 92 1.1.2.2 skrll snprintf(dip->devname, sizeof(dip->devname), "%s%d", 93 1.1.2.2 skrll devname, mmcd_disk++); 94 1.1.2.2 skrll } 95 1.1.2.2 skrll strlcat(buf, dip->devname, bufsiz); 96 1.1.2.2 skrll disk++; 97 1.1.2.2 skrll 98 1.1.2.2 skrll /* Try to find the label, to figure out device type. */ 99 1.1.2.2 skrll if (bios_getdisklabel(&dip->bios_info, &dip->disklabel) 100 1.1.2.2 skrll == NULL) { 101 1.1.2.2 skrll strlcat(buf, "*", bufsiz); 102 1.1.2.2 skrll if (first) { 103 1.1.2.2 skrll first = 0; 104 1.1.2.2 skrll strlcpy(disk_devname, devname, 105 1.1.2.2 skrll sizeof(disk_devname)); 106 1.1.2.2 skrll default_devname = disk_devname; 107 1.1.2.2 skrll default_unit = unit; 108 1.1.2.2 skrll } 109 1.1.2.2 skrll } else { 110 1.1.2.2 skrll /* Best guess */ 111 1.1.2.2 skrll switch (dip->disklabel.d_type) { 112 1.1.2.2 skrll case DTYPE_SCSI: 113 1.1.2.2 skrll case DTYPE_ESDI: 114 1.1.2.2 skrll case DTYPE_ST506: 115 1.1.2.2 skrll dip->bios_info.flags |= BDI_GOODLABEL; 116 1.1.2.2 skrll break; 117 1.1.2.2 skrll 118 1.1.2.2 skrll default: 119 1.1.2.2 skrll dip->bios_info.flags |= BDI_BADLABEL; 120 1.1.2.2 skrll } 121 1.1.2.2 skrll } 122 1.1.2.2 skrll 123 1.1.2.2 skrll /* Add to queue of disks. */ 124 1.1.2.2 skrll TAILQ_INSERT_TAIL(&disklist, dip, list); 125 1.1.2.2 skrll 126 1.1.2.2 skrll strlcat(buf, " ", bufsiz); 127 1.1.2.2 skrll } 128 1.1.2.2 skrll if (disk == 0) 129 1.1.2.2 skrll strlcat(buf, "none...", bufsiz); 130 1.1.2.2 skrll } 131 1.1.2.2 skrll 132 1.1.2.2 skrll /* Probe for all BIOS supported disks */ 133 1.1.2.2 skrll void 134 1.1.2.2 skrll diskprobe(char *buf, size_t bufsiz) 135 1.1.2.2 skrll { 136 1.1.2.2 skrll 137 1.1.2.2 skrll /* Init stuff */ 138 1.1.2.2 skrll TAILQ_INIT(&disklist); 139 1.1.2.2 skrll 140 1.1.2.2 skrll /* Do probes */ 141 1.1.2.2 skrll hardprobe(buf, bufsiz); 142 1.1.2.2 skrll } 143 1.1.2.2 skrll 144 1.1.2.2 skrll /* 145 1.1.2.2 skrll * Find info on the disk given by major + unit number. 146 1.1.2.2 skrll */ 147 1.1.2.2 skrll struct diskinfo * 148 1.1.2.2 skrll dkdevice(const char *devname, uint unit) 149 1.1.2.2 skrll { 150 1.1.2.2 skrll char name[MAXDEVNAME]; 151 1.1.2.2 skrll struct diskinfo *dip; 152 1.1.2.2 skrll 153 1.1.2.2 skrll snprintf(name, sizeof(name), "%s%d", devname, unit); 154 1.1.2.2 skrll for (dip = TAILQ_FIRST(&disklist); dip != NULL; 155 1.1.2.2 skrll dip = TAILQ_NEXT(dip, list)) { 156 1.1.2.2 skrll if (strcmp(name, dip->devname) == 0) { 157 1.1.2.2 skrll return dip; 158 1.1.2.2 skrll } 159 1.1.2.2 skrll } 160 1.1.2.2 skrll return NULL; 161 1.1.2.2 skrll } 162 1.1.2.2 skrll 163 1.1.2.2 skrll int 164 1.1.2.2 skrll bios_devname(int biosdev, char *devname, int size) 165 1.1.2.2 skrll { 166 1.1.2.2 skrll 167 1.1.2.2 skrll if ((biosdev & 0x80) != 0) { 168 1.1.2.2 skrll strlcpy(devname, devname_hd, size); 169 1.1.2.2 skrll } else { 170 1.1.2.2 skrll strlcpy(devname, devname_mmcd, size); 171 1.1.2.2 skrll } 172 1.1.2.2 skrll return 0; 173 1.1.2.2 skrll } 174 1.1.2.2 skrll 175 1.1.2.2 skrll /* 176 1.1.2.2 skrll * Find the Linux device path that corresponds to the given "BIOS" disk, 177 1.1.2.2 skrll * where 0x80 corresponds to /dev/hda, 0x81 to /dev/hdb, and so on. 178 1.1.2.2 skrll */ 179 1.1.2.2 skrll void 180 1.1.2.2 skrll bios_devpath(int dev, int part, char *p) 181 1.1.2.2 skrll { 182 1.1.2.2 skrll char devname[MAXDEVNAME]; 183 1.1.2.2 skrll const char *q; 184 1.1.2.2 skrll 185 1.1.2.2 skrll *p++ = '/'; 186 1.1.2.2 skrll *p++ = 'd'; 187 1.1.2.2 skrll *p++ = 'e'; 188 1.1.2.2 skrll *p++ = 'v'; 189 1.1.2.2 skrll *p++ = '/'; 190 1.1.2.2 skrll 191 1.1.2.2 skrll bios_devname(dev, devname, sizeof(devname)); 192 1.1.2.2 skrll q = devname; 193 1.1.2.2 skrll while (*q != '\0') 194 1.1.2.2 skrll *p++ = *q++; 195 1.1.2.2 skrll 196 1.1.2.2 skrll *p++ = 'a' + (dev & 0x7f); 197 1.1.2.2 skrll if (part >= 0) 198 1.1.2.2 skrll *p++ = '1' + part; 199 1.1.2.2 skrll *p = '\0'; 200 1.1.2.2 skrll } 201 1.1.2.2 skrll 202 1.1.2.2 skrll /* 203 1.1.2.2 skrll * Fill out a bios_diskinfo_t for this device. 204 1.1.2.2 skrll */ 205 1.1.2.2 skrll char * 206 1.1.2.2 skrll bios_getdiskinfo(int dev, bios_diskinfo_t *bdi) 207 1.1.2.2 skrll { 208 1.1.2.2 skrll static char path[PATH_MAX]; 209 1.1.2.2 skrll struct linux_stat sb; 210 1.1.2.2 skrll 211 1.1.2.2 skrll memset(bdi, 0, sizeof *bdi); 212 1.1.2.2 skrll bdi->bios_number = -1; 213 1.1.2.2 skrll 214 1.1.2.2 skrll bios_devpath(dev, -1, path); 215 1.1.2.2 skrll 216 1.1.2.2 skrll if (ustat(path, &sb) != 0) 217 1.1.2.2 skrll return "no device node"; 218 1.1.2.2 skrll 219 1.1.2.2 skrll bdi->bios_number = dev; 220 1.1.2.2 skrll 221 1.1.2.2 skrll if (bios_getdospart(bdi) < 0) 222 1.1.2.2 skrll return "no NetBSD partition"; 223 1.1.2.2 skrll 224 1.1.2.2 skrll return NULL; 225 1.1.2.2 skrll } 226 1.1.2.2 skrll 227 1.1.2.2 skrll int 228 1.1.2.2 skrll bios_getdospart(bios_diskinfo_t *bdi) 229 1.1.2.2 skrll { 230 1.1.2.2 skrll char path[PATH_MAX]; 231 1.1.2.2 skrll char buf[DEV_BSIZE]; 232 1.1.2.2 skrll struct mbr_partition *mp; 233 1.1.2.2 skrll int fd; 234 1.1.2.2 skrll u_int part; 235 1.1.2.2 skrll size_t rsize; 236 1.1.2.2 skrll 237 1.1.2.2 skrll bios_devpath(bdi->bios_number, -1, path); 238 1.1.2.2 skrll 239 1.1.2.2 skrll /* 240 1.1.2.2 skrll * Give disk devices some time to become ready when the first open 241 1.1.2.2 skrll * fails. Even when open succeeds the disk is sometimes not ready. 242 1.1.2.2 skrll */ 243 1.1.2.2 skrll if ((fd = uopen(path, LINUX_O_RDONLY)) == -1 && errno == ENXIO) { 244 1.1.2.2 skrll while (fd == -1 && timeout > 0) { 245 1.1.2.2 skrll timeout--; 246 1.1.2.2 skrll sleep(1); 247 1.1.2.2 skrll fd = uopen(path, LINUX_O_RDONLY); 248 1.1.2.2 skrll } 249 1.1.2.2 skrll if (fd != -1) 250 1.1.2.2 skrll sleep(2); 251 1.1.2.2 skrll } 252 1.1.2.2 skrll if (fd == -1) 253 1.1.2.2 skrll return -1; 254 1.1.2.2 skrll 255 1.1.2.2 skrll /* Read the disk's MBR. */ 256 1.1.2.2 skrll if (unixstrategy((void *)fd, F_READ, MBR_BBSECTOR, DEV_BSIZE, buf, 257 1.1.2.2 skrll &rsize) != 0 || rsize != DEV_BSIZE) { 258 1.1.2.2 skrll uclose(fd); 259 1.1.2.2 skrll errno = EIO; 260 1.1.2.2 skrll return -1; 261 1.1.2.2 skrll } 262 1.1.2.2 skrll 263 1.1.2.2 skrll /* Find NetBSD primary partition in the disk's MBR. */ 264 1.1.2.2 skrll mp = (struct mbr_partition *)&buf[MBR_PART_OFFSET]; 265 1.1.2.2 skrll for (part = 0; part < MBR_PART_COUNT; part++) { 266 1.1.2.2 skrll if (mp[part].mbrp_type == MBR_PTYPE_NETBSD) 267 1.1.2.2 skrll break; 268 1.1.2.2 skrll } 269 1.1.2.2 skrll if (part == MBR_PART_COUNT) { 270 1.1.2.2 skrll uclose(fd); 271 1.1.2.2 skrll errno = ERDLAB; 272 1.1.2.2 skrll return -1; 273 1.1.2.2 skrll } 274 1.1.2.2 skrll uclose(fd); 275 1.1.2.2 skrll 276 1.1.2.2 skrll return part; 277 1.1.2.2 skrll } 278 1.1.2.2 skrll 279 1.1.2.2 skrll char * 280 1.1.2.2 skrll bios_getdisklabel(bios_diskinfo_t *bdi, struct disklabel *label) 281 1.1.2.2 skrll { 282 1.1.2.2 skrll char path[PATH_MAX]; 283 1.1.2.2 skrll char buf[DEV_BSIZE]; 284 1.1.2.2 skrll int part; 285 1.1.2.2 skrll int fd; 286 1.1.2.2 skrll size_t rsize; 287 1.1.2.2 skrll 288 1.1.2.2 skrll part = bios_getdospart(bdi); 289 1.1.2.2 skrll if (part < 0) 290 1.1.2.2 skrll return "no NetBSD partition"; 291 1.1.2.2 skrll 292 1.1.2.2 skrll bios_devpath(bdi->bios_number, part, path); 293 1.1.2.2 skrll 294 1.1.2.2 skrll /* Test if the NetBSD partition has a valid disklabel. */ 295 1.1.2.2 skrll if ((fd = uopen(path, LINUX_O_RDONLY)) != -1) { 296 1.1.2.2 skrll char *msg = "failed to read disklabel"; 297 1.1.2.2 skrll 298 1.1.2.2 skrll if (unixstrategy((void *)fd, F_READ, LABELSECTOR, 299 1.1.2.2 skrll DEV_BSIZE, buf, &rsize) == 0 && rsize == DEV_BSIZE) 300 1.1.2.2 skrll msg = getdisklabel(buf, label); 301 1.1.2.2 skrll uclose(fd); 302 1.1.2.2 skrll /* Don't wait for other disks if this label is ok. */ 303 1.1.2.2 skrll if (msg == NULL) 304 1.1.2.2 skrll timeout = 0; 305 1.1.2.2 skrll return msg; 306 1.1.2.2 skrll } 307 1.1.2.2 skrll 308 1.1.2.2 skrll return "failed to open partition"; 309 1.1.2.2 skrll } 310
Indexes created Tue Oct 21 19:09:51 GMT 2025