| 1 | /* $NetBSD: kern_subr.c,v 1.217 2016/05/12 02:24:16 ozaki-r Exp $ */ |
| 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1997, 1998, 1999, 2002, 2007, 2008 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to The NetBSD Foundation |
| 8 | * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, |
| 9 | * NASA Ames Research Center, and by Luke Mewburn. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 30 | * POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /* |
| 34 | * Copyright (c) 1982, 1986, 1991, 1993 |
| 35 | * The Regents of the University of California. All rights reserved. |
| 36 | * (c) UNIX System Laboratories, Inc. |
| 37 | * All or some portions of this file are derived from material licensed |
| 38 | * to the University of California by American Telephone and Telegraph |
| 39 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 40 | * the permission of UNIX System Laboratories, Inc. |
| 41 | * |
| 42 | * Copyright (c) 1992, 1993 |
| 43 | * The Regents of the University of California. All rights reserved. |
| 44 | * |
| 45 | * This software was developed by the Computer Systems Engineering group |
| 46 | * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and |
| 47 | * contributed to Berkeley. |
| 48 | * |
| 49 | * All advertising materials mentioning features or use of this software |
| 50 | * must display the following acknowledgement: |
| 51 | * This product includes software developed by the University of |
| 52 | * California, Lawrence Berkeley Laboratory. |
| 53 | * |
| 54 | * Redistribution and use in source and binary forms, with or without |
| 55 | * modification, are permitted provided that the following conditions |
| 56 | * are met: |
| 57 | * 1. Redistributions of source code must retain the above copyright |
| 58 | * notice, this list of conditions and the following disclaimer. |
| 59 | * 2. Redistributions in binary form must reproduce the above copyright |
| 60 | * notice, this list of conditions and the following disclaimer in the |
| 61 | * documentation and/or other materials provided with the distribution. |
| 62 | * 3. Neither the name of the University nor the names of its contributors |
| 63 | * may be used to endorse or promote products derived from this software |
| 64 | * without specific prior written permission. |
| 65 | * |
| 66 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 67 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 68 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 69 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 70 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 71 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 72 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 73 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 74 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 75 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 76 | * SUCH DAMAGE. |
| 77 | * |
| 78 | * @(#)kern_subr.c 8.4 (Berkeley) 2/14/95 |
| 79 | */ |
| 80 | |
| 81 | #include <sys/cdefs.h> |
| 82 | __KERNEL_RCSID(0, "$NetBSD: kern_subr.c,v 1.217 2016/05/12 02:24:16 ozaki-r Exp $" ); |
| 83 | |
| 84 | #include "opt_ddb.h" |
| 85 | #include "opt_md.h" |
| 86 | #include "opt_tftproot.h" |
| 87 | |
| 88 | #include <sys/param.h> |
| 89 | #include <sys/systm.h> |
| 90 | #include <sys/proc.h> |
| 91 | #include <sys/mount.h> |
| 92 | #include <sys/device.h> |
| 93 | #include <sys/reboot.h> |
| 94 | #include <sys/conf.h> |
| 95 | #include <sys/disk.h> |
| 96 | #include <sys/disklabel.h> |
| 97 | #include <sys/queue.h> |
| 98 | #include <sys/fcntl.h> |
| 99 | #include <sys/kauth.h> |
| 100 | #include <sys/stat.h> |
| 101 | #include <sys/vnode.h> |
| 102 | #include <sys/module.h> |
| 103 | |
| 104 | #include <dev/cons.h> |
| 105 | |
| 106 | #include <net/if.h> |
| 107 | |
| 108 | /* XXX these should eventually move to subr_autoconf.c */ |
| 109 | static device_t finddevice(const char *); |
| 110 | static device_t getdisk(char *, int, int, dev_t *, int); |
| 111 | static device_t parsedisk(char *, int, int, dev_t *); |
| 112 | static const char *getwedgename(const char *, int); |
| 113 | |
| 114 | #ifdef TFTPROOT |
| 115 | int tftproot_dhcpboot(device_t); |
| 116 | #endif |
| 117 | |
| 118 | dev_t dumpcdev; /* for savecore */ |
| 119 | |
| 120 | static int |
| 121 | isswap(device_t dv) |
| 122 | { |
| 123 | struct dkwedge_info wi; |
| 124 | struct vnode *vn; |
| 125 | int error; |
| 126 | |
| 127 | if (device_class(dv) != DV_DISK || !device_is_a(dv, "dk" )) |
| 128 | return 0; |
| 129 | |
| 130 | if ((vn = opendisk(dv)) == NULL) |
| 131 | return 0; |
| 132 | |
| 133 | error = VOP_IOCTL(vn, DIOCGWEDGEINFO, &wi, FREAD, NOCRED); |
| 134 | VOP_CLOSE(vn, FREAD, NOCRED); |
| 135 | vput(vn); |
| 136 | if (error) { |
| 137 | #ifdef DEBUG_WEDGE |
| 138 | printf("%s: Get wedge info returned %d\n" , device_xname(dv), error); |
| 139 | #endif |
| 140 | return 0; |
| 141 | } |
| 142 | return strcmp(wi.dkw_ptype, DKW_PTYPE_SWAP) == 0; |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * Determine the root device and, if instructed to, the root file system. |
| 147 | */ |
| 148 | |
| 149 | #ifdef MEMORY_DISK_IS_ROOT |
| 150 | int md_is_root = 1; |
| 151 | #else |
| 152 | int md_is_root = 0; |
| 153 | #endif |
| 154 | |
| 155 | /* |
| 156 | * The device and partition that we booted from. |
| 157 | */ |
| 158 | device_t booted_device; |
| 159 | int booted_partition; |
| 160 | daddr_t booted_startblk; |
| 161 | uint64_t booted_nblks; |
| 162 | char *bootspec; |
| 163 | |
| 164 | /* |
| 165 | * Use partition letters if it's a disk class but not a wedge. |
| 166 | * XXX Check for wedge is kinda gross. |
| 167 | */ |
| 168 | #define DEV_USES_PARTITIONS(dv) \ |
| 169 | (device_class((dv)) == DV_DISK && \ |
| 170 | !device_is_a((dv), "dk")) |
| 171 | |
| 172 | void |
| 173 | setroot(device_t bootdv, int bootpartition) |
| 174 | { |
| 175 | device_t dv; |
| 176 | deviter_t di; |
| 177 | int len, majdev; |
| 178 | dev_t nrootdev; |
| 179 | dev_t ndumpdev = NODEV; |
| 180 | char buf[128]; |
| 181 | const char *rootdevname; |
| 182 | const char *dumpdevname; |
| 183 | device_t rootdv = NULL; /* XXX gcc -Wuninitialized */ |
| 184 | device_t dumpdv = NULL; |
| 185 | struct ifnet *ifp; |
| 186 | const char *deffsname; |
| 187 | struct vfsops *vops; |
| 188 | |
| 189 | #ifdef TFTPROOT |
| 190 | if (tftproot_dhcpboot(bootdv) != 0) |
| 191 | boothowto |= RB_ASKNAME; |
| 192 | #endif |
| 193 | |
| 194 | /* |
| 195 | * For root on md0 we have to force the attachment of md0. |
| 196 | */ |
| 197 | if (md_is_root) { |
| 198 | int md_major; |
| 199 | dev_t md_dev; |
| 200 | |
| 201 | bootdv = NULL; |
| 202 | md_major = devsw_name2blk("md" , NULL, 0); |
| 203 | if (md_major >= 0) { |
| 204 | md_dev = MAKEDISKDEV(md_major, 0, RAW_PART); |
| 205 | if (bdev_open(md_dev, FREAD, S_IFBLK, curlwp) == 0) |
| 206 | bootdv = device_find_by_xname("md0" ); |
| 207 | } |
| 208 | if (bootdv == NULL) |
| 209 | panic("Cannot open \"md0\" (root)" ); |
| 210 | } |
| 211 | |
| 212 | /* |
| 213 | * Let bootcode augment "rootspec". |
| 214 | */ |
| 215 | if (rootspec == NULL) |
| 216 | rootspec = bootspec; |
| 217 | |
| 218 | /* |
| 219 | * If NFS is specified as the file system, and we found |
| 220 | * a DV_DISK boot device (or no boot device at all), then |
| 221 | * find a reasonable network interface for "rootspec". |
| 222 | */ |
| 223 | vops = vfs_getopsbyname(MOUNT_NFS); |
| 224 | if (vops != NULL && strcmp(rootfstype, MOUNT_NFS) == 0 && |
| 225 | rootspec == NULL && |
| 226 | (bootdv == NULL || device_class(bootdv) != DV_IFNET)) { |
| 227 | int s = pserialize_read_enter(); |
| 228 | IFNET_READER_FOREACH(ifp) { |
| 229 | if ((ifp->if_flags & |
| 230 | (IFF_LOOPBACK|IFF_POINTOPOINT)) == 0) |
| 231 | break; |
| 232 | } |
| 233 | if (ifp == NULL) { |
| 234 | /* |
| 235 | * Can't find a suitable interface; ask the |
| 236 | * user. |
| 237 | */ |
| 238 | boothowto |= RB_ASKNAME; |
| 239 | } else { |
| 240 | /* |
| 241 | * Have a suitable interface; behave as if |
| 242 | * the user specified this interface. |
| 243 | */ |
| 244 | rootspec = (const char *)ifp->if_xname; |
| 245 | } |
| 246 | pserialize_read_exit(s); |
| 247 | } |
| 248 | if (vops != NULL) |
| 249 | vfs_delref(vops); |
| 250 | |
| 251 | /* |
| 252 | * If wildcarded root and we the boot device wasn't determined, |
| 253 | * ask the user. |
| 254 | */ |
| 255 | if (rootspec == NULL && bootdv == NULL) |
| 256 | boothowto |= RB_ASKNAME; |
| 257 | |
| 258 | top: |
| 259 | if (boothowto & RB_ASKNAME) { |
| 260 | device_t defdumpdv; |
| 261 | |
| 262 | for (;;) { |
| 263 | printf("root device" ); |
| 264 | if (bootdv != NULL) { |
| 265 | printf(" (default %s" , device_xname(bootdv)); |
| 266 | if (DEV_USES_PARTITIONS(bootdv)) |
| 267 | printf("%c" , bootpartition + 'a'); |
| 268 | printf(")" ); |
| 269 | } |
| 270 | printf(": " ); |
| 271 | len = cngetsn(buf, sizeof(buf)); |
| 272 | if (len == 0 && bootdv != NULL) { |
| 273 | strlcpy(buf, device_xname(bootdv), sizeof(buf)); |
| 274 | len = strlen(buf); |
| 275 | } |
| 276 | if (len > 0 && buf[len - 1] == '*') { |
| 277 | buf[--len] = '\0'; |
| 278 | dv = getdisk(buf, len, 1, &nrootdev, 0); |
| 279 | if (dv != NULL) { |
| 280 | rootdv = dv; |
| 281 | break; |
| 282 | } |
| 283 | } |
| 284 | dv = getdisk(buf, len, bootpartition, &nrootdev, 0); |
| 285 | if (dv != NULL) { |
| 286 | rootdv = dv; |
| 287 | break; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * Set up the default dump device. If root is on |
| 293 | * a network device, there is no default dump |
| 294 | * device, since we don't support dumps to the |
| 295 | * network. |
| 296 | */ |
| 297 | if (DEV_USES_PARTITIONS(rootdv) == 0) |
| 298 | defdumpdv = NULL; |
| 299 | else |
| 300 | defdumpdv = rootdv; |
| 301 | |
| 302 | for (;;) { |
| 303 | printf("dump device" ); |
| 304 | if (defdumpdv != NULL) { |
| 305 | /* |
| 306 | * Note, we know it's a disk if we get here. |
| 307 | */ |
| 308 | printf(" (default %sb)" , device_xname(defdumpdv)); |
| 309 | } |
| 310 | printf(": " ); |
| 311 | len = cngetsn(buf, sizeof(buf)); |
| 312 | if (len == 0) { |
| 313 | if (defdumpdv != NULL) { |
| 314 | ndumpdev = MAKEDISKDEV(major(nrootdev), |
| 315 | DISKUNIT(nrootdev), 1); |
| 316 | } |
| 317 | dumpdv = defdumpdv; |
| 318 | break; |
| 319 | } |
| 320 | if (len == 4 && strcmp(buf, "none" ) == 0) { |
| 321 | dumpdv = NULL; |
| 322 | break; |
| 323 | } |
| 324 | dv = getdisk(buf, len, 1, &ndumpdev, 1); |
| 325 | if (dv != NULL) { |
| 326 | dumpdv = dv; |
| 327 | break; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | rootdev = nrootdev; |
| 332 | dumpdev = ndumpdev; |
| 333 | |
| 334 | for (vops = LIST_FIRST(&vfs_list); vops != NULL; |
| 335 | vops = LIST_NEXT(vops, vfs_list)) { |
| 336 | if (vops->vfs_mountroot != NULL && |
| 337 | strcmp(rootfstype, vops->vfs_name) == 0) |
| 338 | break; |
| 339 | } |
| 340 | |
| 341 | if (vops == NULL) { |
| 342 | deffsname = "generic" ; |
| 343 | } else |
| 344 | deffsname = vops->vfs_name; |
| 345 | |
| 346 | for (;;) { |
| 347 | printf("file system (default %s): " , deffsname); |
| 348 | len = cngetsn(buf, sizeof(buf)); |
| 349 | if (len == 0) { |
| 350 | if (strcmp(deffsname, "generic" ) == 0) |
| 351 | rootfstype = ROOT_FSTYPE_ANY; |
| 352 | break; |
| 353 | } |
| 354 | if (len == 4 && strcmp(buf, "halt" ) == 0) |
| 355 | cpu_reboot(RB_HALT, NULL); |
| 356 | else if (len == 6 && strcmp(buf, "reboot" ) == 0) |
| 357 | cpu_reboot(0, NULL); |
| 358 | #if defined(DDB) |
| 359 | else if (len == 3 && strcmp(buf, "ddb" ) == 0) { |
| 360 | console_debugger(); |
| 361 | } |
| 362 | #endif |
| 363 | else if (len == 7 && strcmp(buf, "generic" ) == 0) { |
| 364 | rootfstype = ROOT_FSTYPE_ANY; |
| 365 | break; |
| 366 | } |
| 367 | vops = vfs_getopsbyname(buf); |
| 368 | if (vops == NULL || vops->vfs_mountroot == NULL) { |
| 369 | printf("use one of: generic" ); |
| 370 | for (vops = LIST_FIRST(&vfs_list); |
| 371 | vops != NULL; |
| 372 | vops = LIST_NEXT(vops, vfs_list)) { |
| 373 | if (vops->vfs_mountroot != NULL) |
| 374 | printf(" %s" , vops->vfs_name); |
| 375 | } |
| 376 | if (vops != NULL) |
| 377 | vfs_delref(vops); |
| 378 | #if defined(DDB) |
| 379 | printf(" ddb" ); |
| 380 | #endif |
| 381 | printf(" halt reboot\n" ); |
| 382 | } else { |
| 383 | /* |
| 384 | * XXX If *vops gets freed between here and |
| 385 | * the call to mountroot(), rootfstype will |
| 386 | * point to something unexpected. But in |
| 387 | * this case the system will fail anyway. |
| 388 | */ |
| 389 | rootfstype = vops->vfs_name; |
| 390 | vfs_delref(vops); |
| 391 | break; |
| 392 | } |
| 393 | } |
| 394 | |
| 395 | } else if (rootspec == NULL) { |
| 396 | /* |
| 397 | * Wildcarded root; use the boot device. |
| 398 | */ |
| 399 | rootdv = bootdv; |
| 400 | |
| 401 | if (bootdv) |
| 402 | majdev = devsw_name2blk(device_xname(bootdv), NULL, 0); |
| 403 | else |
| 404 | majdev = -1; |
| 405 | if (majdev >= 0) { |
| 406 | /* |
| 407 | * Root is on a disk. `bootpartition' is root, |
| 408 | * unless the device does not use partitions. |
| 409 | */ |
| 410 | if (DEV_USES_PARTITIONS(bootdv)) |
| 411 | rootdev = MAKEDISKDEV(majdev, |
| 412 | device_unit(bootdv), |
| 413 | bootpartition); |
| 414 | else |
| 415 | rootdev = makedev(majdev, device_unit(bootdv)); |
| 416 | } |
| 417 | } else { |
| 418 | |
| 419 | /* |
| 420 | * `root on <dev> ...' |
| 421 | */ |
| 422 | |
| 423 | /* |
| 424 | * If it's a network interface, we can bail out |
| 425 | * early. |
| 426 | */ |
| 427 | dv = finddevice(rootspec); |
| 428 | if (dv != NULL && device_class(dv) == DV_IFNET) { |
| 429 | rootdv = dv; |
| 430 | goto haveroot; |
| 431 | } |
| 432 | |
| 433 | if (rootdev == NODEV && |
| 434 | dv != NULL && device_class(dv) == DV_DISK && |
| 435 | device_is_a(dv, "dk" ) && |
| 436 | (majdev = devsw_name2blk(device_xname(dv), NULL, 0)) >= 0) |
| 437 | rootdev = makedev(majdev, device_unit(dv)); |
| 438 | |
| 439 | rootdevname = devsw_blk2name(major(rootdev)); |
| 440 | if (rootdevname == NULL) { |
| 441 | printf("unknown device major 0x%llx\n" , |
| 442 | (unsigned long long)rootdev); |
| 443 | boothowto |= RB_ASKNAME; |
| 444 | goto top; |
| 445 | } |
| 446 | memset(buf, 0, sizeof(buf)); |
| 447 | snprintf(buf, sizeof(buf), "%s%llu" , rootdevname, |
| 448 | (unsigned long long)DISKUNIT(rootdev)); |
| 449 | |
| 450 | rootdv = finddevice(buf); |
| 451 | if (rootdv == NULL) { |
| 452 | printf("device %s (0x%llx) not configured\n" , |
| 453 | buf, (unsigned long long)rootdev); |
| 454 | boothowto |= RB_ASKNAME; |
| 455 | goto top; |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | haveroot: |
| 460 | |
| 461 | root_device = rootdv; |
| 462 | |
| 463 | switch (device_class(rootdv)) { |
| 464 | case DV_IFNET: |
| 465 | case DV_DISK: |
| 466 | aprint_normal("root on %s" , device_xname(rootdv)); |
| 467 | if (DEV_USES_PARTITIONS(rootdv)) |
| 468 | aprint_normal("%c" , (int)DISKPART(rootdev) + 'a'); |
| 469 | break; |
| 470 | |
| 471 | default: |
| 472 | printf("can't determine root device\n" ); |
| 473 | boothowto |= RB_ASKNAME; |
| 474 | goto top; |
| 475 | } |
| 476 | |
| 477 | /* |
| 478 | * Now configure the dump device. |
| 479 | * |
| 480 | * If we haven't figured out the dump device, do so, with |
| 481 | * the following rules: |
| 482 | * |
| 483 | * (a) We already know dumpdv in the RB_ASKNAME case. |
| 484 | * |
| 485 | * (b) If dumpspec is set, try to use it. If the device |
| 486 | * is not available, punt. |
| 487 | * |
| 488 | * (c) If dumpspec is not set, the dump device is |
| 489 | * wildcarded or unspecified. If the root device |
| 490 | * is DV_IFNET, punt. Otherwise, use partition b |
| 491 | * of the root device. |
| 492 | */ |
| 493 | |
| 494 | if (boothowto & RB_ASKNAME) { /* (a) */ |
| 495 | if (dumpdv == NULL) |
| 496 | goto nodumpdev; |
| 497 | } else if (dumpspec != NULL) { /* (b) */ |
| 498 | if (strcmp(dumpspec, "none" ) == 0 || dumpdev == NODEV) { |
| 499 | /* |
| 500 | * Operator doesn't want a dump device. |
| 501 | * Or looks like they tried to pick a network |
| 502 | * device. Oops. |
| 503 | */ |
| 504 | goto nodumpdev; |
| 505 | } |
| 506 | |
| 507 | dumpdevname = devsw_blk2name(major(dumpdev)); |
| 508 | if (dumpdevname == NULL) |
| 509 | goto nodumpdev; |
| 510 | memset(buf, 0, sizeof(buf)); |
| 511 | snprintf(buf, sizeof(buf), "%s%llu" , dumpdevname, |
| 512 | (unsigned long long)DISKUNIT(dumpdev)); |
| 513 | |
| 514 | dumpdv = finddevice(buf); |
| 515 | if (dumpdv == NULL) { |
| 516 | /* |
| 517 | * Device not configured. |
| 518 | */ |
| 519 | goto nodumpdev; |
| 520 | } |
| 521 | } else { /* (c) */ |
| 522 | if (DEV_USES_PARTITIONS(rootdv) == 0) { |
| 523 | for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); |
| 524 | dv != NULL; |
| 525 | dv = deviter_next(&di)) |
| 526 | if (isswap(dv)) |
| 527 | break; |
| 528 | deviter_release(&di); |
| 529 | if (dv == NULL) |
| 530 | goto nodumpdev; |
| 531 | |
| 532 | majdev = devsw_name2blk(device_xname(dv), NULL, 0); |
| 533 | if (majdev < 0) |
| 534 | goto nodumpdev; |
| 535 | dumpdv = dv; |
| 536 | dumpdev = makedev(majdev, device_unit(dumpdv)); |
| 537 | } else { |
| 538 | dumpdv = rootdv; |
| 539 | dumpdev = MAKEDISKDEV(major(rootdev), |
| 540 | device_unit(dumpdv), 1); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | dumpcdev = devsw_blk2chr(dumpdev); |
| 545 | aprint_normal(" dumps on %s" , device_xname(dumpdv)); |
| 546 | if (DEV_USES_PARTITIONS(dumpdv)) |
| 547 | aprint_normal("%c" , (int)DISKPART(dumpdev) + 'a'); |
| 548 | aprint_normal("\n" ); |
| 549 | return; |
| 550 | |
| 551 | nodumpdev: |
| 552 | dumpdev = NODEV; |
| 553 | dumpcdev = NODEV; |
| 554 | aprint_normal("\n" ); |
| 555 | } |
| 556 | |
| 557 | static device_t |
| 558 | finddevice(const char *name) |
| 559 | { |
| 560 | const char *wname; |
| 561 | |
| 562 | if ((wname = getwedgename(name, strlen(name))) != NULL) |
| 563 | return dkwedge_find_by_wname(wname); |
| 564 | |
| 565 | return device_find_by_xname(name); |
| 566 | } |
| 567 | |
| 568 | static device_t |
| 569 | getdisk(char *str, int len, int defpart, dev_t *devp, int isdump) |
| 570 | { |
| 571 | device_t dv; |
| 572 | deviter_t di; |
| 573 | |
| 574 | if ((dv = parsedisk(str, len, defpart, devp)) == NULL) { |
| 575 | printf("use one of:" ); |
| 576 | for (dv = deviter_first(&di, DEVITER_F_ROOT_FIRST); dv != NULL; |
| 577 | dv = deviter_next(&di)) { |
| 578 | if (DEV_USES_PARTITIONS(dv)) |
| 579 | printf(" %s[a-%c]" , device_xname(dv), |
| 580 | 'a' + MAXPARTITIONS - 1); |
| 581 | else if (device_class(dv) == DV_DISK) |
| 582 | printf(" %s" , device_xname(dv)); |
| 583 | if (isdump == 0 && device_class(dv) == DV_IFNET) |
| 584 | printf(" %s" , device_xname(dv)); |
| 585 | } |
| 586 | deviter_release(&di); |
| 587 | dkwedge_print_wnames(); |
| 588 | if (isdump) |
| 589 | printf(" none" ); |
| 590 | #if defined(DDB) |
| 591 | printf(" ddb" ); |
| 592 | #endif |
| 593 | printf(" halt reboot\n" ); |
| 594 | } |
| 595 | return dv; |
| 596 | } |
| 597 | |
| 598 | static const char * |
| 599 | getwedgename(const char *name, int namelen) |
| 600 | { |
| 601 | const char *wpfx = "wedge:" ; |
| 602 | const int wpfxlen = strlen(wpfx); |
| 603 | |
| 604 | if (namelen < wpfxlen || strncmp(name, wpfx, wpfxlen) != 0) |
| 605 | return NULL; |
| 606 | |
| 607 | return name + wpfxlen; |
| 608 | } |
| 609 | |
| 610 | static device_t |
| 611 | parsedisk(char *str, int len, int defpart, dev_t *devp) |
| 612 | { |
| 613 | device_t dv; |
| 614 | const char *wname; |
| 615 | char *cp, c; |
| 616 | int majdev, part; |
| 617 | if (len == 0) |
| 618 | return (NULL); |
| 619 | |
| 620 | if (len == 4 && strcmp(str, "halt" ) == 0) |
| 621 | cpu_reboot(RB_HALT, NULL); |
| 622 | else if (len == 6 && strcmp(str, "reboot" ) == 0) |
| 623 | cpu_reboot(0, NULL); |
| 624 | #if defined(DDB) |
| 625 | else if (len == 3 && strcmp(str, "ddb" ) == 0) |
| 626 | console_debugger(); |
| 627 | #endif |
| 628 | |
| 629 | cp = str + len - 1; |
| 630 | c = *cp; |
| 631 | |
| 632 | if ((wname = getwedgename(str, len)) != NULL) { |
| 633 | if ((dv = dkwedge_find_by_wname(wname)) == NULL) |
| 634 | return NULL; |
| 635 | part = defpart; |
| 636 | goto gotdisk; |
| 637 | } else if (c >= 'a' && c <= ('a' + MAXPARTITIONS - 1)) { |
| 638 | part = c - 'a'; |
| 639 | *cp = '\0'; |
| 640 | } else |
| 641 | part = defpart; |
| 642 | |
| 643 | dv = finddevice(str); |
| 644 | if (dv != NULL) { |
| 645 | if (device_class(dv) == DV_DISK) { |
| 646 | gotdisk: |
| 647 | majdev = devsw_name2blk(device_xname(dv), NULL, 0); |
| 648 | if (majdev < 0) |
| 649 | panic("parsedisk" ); |
| 650 | if (DEV_USES_PARTITIONS(dv)) |
| 651 | *devp = MAKEDISKDEV(majdev, device_unit(dv), |
| 652 | part); |
| 653 | else |
| 654 | *devp = makedev(majdev, device_unit(dv)); |
| 655 | } |
| 656 | |
| 657 | if (device_class(dv) == DV_IFNET) |
| 658 | *devp = NODEV; |
| 659 | } |
| 660 | |
| 661 | *cp = c; |
| 662 | return (dv); |
| 663 | } |
| 664 | |