1 /* $NetBSD: ccdconfig.c,v 1.2.2.1 1995/11/11 02:43:35 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Jason R. Thorpe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Jason R. Thorpe. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD: src/sbin/ccdconfig/ccdconfig.c,v 1.16.2.2 2000/12/11 01:03:25 obrien Exp $ 35 * $DragonFly: src/sbin/ccdconfig/ccdconfig.c,v 1.6 2005/01/14 07:14:15 joerg Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/linker.h> 40 #include <sys/disklabel.h> 41 #include <sys/stat.h> 42 #include <sys/module.h> 43 #include <ctype.h> 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <kvm.h> 48 #include <limits.h> 49 #include <paths.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <unistd.h> 54 55 #include <sys/devicestat.h> 56 #include <sys/ccdvar.h> 57 58 #include "pathnames.h" 59 60 static int lineno = 0; 61 static int verbose = 0; 62 static char *ccdconf = _PATH_CCDCONF; 63 64 static char *core = NULL; 65 static char *kernel = NULL; 66 67 struct flagval { 68 char *fv_flag; 69 int fv_val; 70 } flagvaltab[] = { 71 { "CCDF_SWAP", CCDF_SWAP }, 72 { "CCDF_UNIFORM", CCDF_UNIFORM }, 73 { "CCDF_MIRROR", CCDF_MIRROR }, 74 { "CCDF_PARITY", CCDF_PARITY }, 75 { NULL, 0 }, 76 }; 77 78 static struct nlist nl[] = { 79 { "_ccd_softc" }, 80 #define SYM_CCDSOFTC 0 81 { "_numccd" }, 82 #define SYM_NUMCCD 1 83 { NULL }, 84 }; 85 86 #define CCD_CONFIG 0 /* configure a device */ 87 #define CCD_CONFIGALL 1 /* configure all devices */ 88 #define CCD_UNCONFIG 2 /* unconfigure a device */ 89 #define CCD_UNCONFIGALL 3 /* unconfigure all devices */ 90 #define CCD_DUMP 4 /* dump a ccd's configuration */ 91 92 static int checkdev(char *); 93 static int do_io(char *, u_long, struct ccd_ioctl *); 94 static int do_single(int, char **, int); 95 static int do_all(int); 96 static int dump_ccd(int, char **); 97 static int getmaxpartitions(void); 98 static int getrawpartition(void); 99 static int flags_to_val(char *); 100 static void print_ccd_info(struct ccd_softc *, kvm_t *); 101 static char *resolve_ccdname(char *); 102 static void usage(void); 103 104 int 105 main(int argc, char **argv) 106 { 107 int ch, options = 0, action = CCD_CONFIG; 108 109 while ((ch = getopt(argc, argv, "cCf:gM:N:uUv")) != -1) { 110 switch (ch) { 111 case 'c': 112 action = CCD_CONFIG; 113 ++options; 114 break; 115 116 case 'C': 117 action = CCD_CONFIGALL; 118 ++options; 119 break; 120 121 case 'f': 122 ccdconf = optarg; 123 break; 124 125 case 'g': 126 action = CCD_DUMP; 127 break; 128 129 case 'M': 130 core = optarg; 131 break; 132 133 case 'N': 134 kernel = optarg; 135 break; 136 137 case 'u': 138 action = CCD_UNCONFIG; 139 ++options; 140 break; 141 142 case 'U': 143 action = CCD_UNCONFIGALL; 144 ++options; 145 break; 146 147 case 'v': 148 verbose = 1; 149 break; 150 151 default: 152 usage(); 153 } 154 } 155 argc -= optind; 156 argv += optind; 157 158 if (options > 1) 159 usage(); 160 161 /* 162 * Discard setgid privileges if not the running kernel so that bad 163 * guys can't print interesting stuff from kernel memory. 164 */ 165 if (core != NULL || kernel != NULL || action != CCD_DUMP) { 166 setegid(getgid()); 167 setgid(getgid()); 168 } 169 170 if (modfind("ccd") < 0) { 171 /* Not present in kernel, try loading it */ 172 if (kldload("ccd") < 0 || modfind("ccd") < 0) 173 warn("ccd module not available!"); 174 } 175 176 switch (action) { 177 case CCD_CONFIG: 178 case CCD_UNCONFIG: 179 exit(do_single(argc, argv, action)); 180 /* NOTREACHED */ 181 182 case CCD_CONFIGALL: 183 case CCD_UNCONFIGALL: 184 exit(do_all(action)); 185 /* NOTREACHED */ 186 187 case CCD_DUMP: 188 exit(dump_ccd(argc, argv)); 189 /* NOTREACHED */ 190 } 191 /* NOTREACHED */ 192 return (0); 193 } 194 195 static int 196 do_single(int argc, char **argv, int action) 197 { 198 struct ccd_ioctl ccio; 199 char *ccd, *cp, *cp2, **disks; 200 int noflags = 0, i, ileave, flags = 0, j; 201 202 bzero(&ccio, sizeof(ccio)); 203 204 /* 205 * If unconfiguring, all arguments are treated as ccds. 206 */ 207 if (action == CCD_UNCONFIG || action == CCD_UNCONFIGALL) { 208 for (i = 0; argc != 0; ) { 209 cp = *argv++; --argc; 210 if ((ccd = resolve_ccdname(cp)) == NULL) { 211 warnx("invalid ccd name: %s", cp); 212 i = 1; 213 continue; 214 } 215 if (do_io(ccd, CCDIOCCLR, &ccio)) 216 i = 1; 217 else 218 if (verbose) 219 printf("%s unconfigured\n", cp); 220 } 221 return (i); 222 } 223 224 /* Make sure there are enough arguments. */ 225 if (argc < 4) { 226 if (argc == 3) { 227 /* Assume that no flags are specified. */ 228 noflags = 1; 229 } else { 230 if (action == CCD_CONFIGALL) { 231 warnx("%s: bad line: %d", ccdconf, lineno); 232 return (1); 233 } else 234 usage(); 235 } 236 } 237 238 /* First argument is the ccd to configure. */ 239 cp = *argv++; --argc; 240 if ((ccd = resolve_ccdname(cp)) == NULL) { 241 warnx("invalid ccd name: %s", cp); 242 return (1); 243 } 244 245 /* Next argument is the interleave factor. */ 246 cp = *argv++; --argc; 247 errno = 0; /* to check for ERANGE */ 248 ileave = (int)strtol(cp, &cp2, 10); 249 if ((errno == ERANGE) || (ileave < 0) || (*cp2 != '\0')) { 250 warnx("invalid interleave factor: %s", cp); 251 return (1); 252 } 253 254 if (noflags == 0) { 255 /* Next argument is the ccd configuration flags. */ 256 cp = *argv++; --argc; 257 if ((flags = flags_to_val(cp)) < 0) { 258 warnx("invalid flags argument: %s", cp); 259 return (1); 260 } 261 } 262 263 /* Next is the list of disks to make the ccd from. */ 264 disks = malloc(argc * sizeof(char *)); 265 if (disks == NULL) { 266 warnx("no memory to configure ccd"); 267 return (1); 268 } 269 for (i = 0; argc != 0; ) { 270 cp = *argv++; --argc; 271 if ((j = checkdev(cp)) == 0) 272 disks[i++] = cp; 273 else { 274 warnx("%s: %s", cp, strerror(j)); 275 return (1); 276 } 277 } 278 279 /* Fill in the ccio. */ 280 ccio.ccio_disks = disks; 281 ccio.ccio_ndisks = i; 282 ccio.ccio_ileave = ileave; 283 ccio.ccio_flags = flags; 284 285 if (do_io(ccd, CCDIOCSET, &ccio)) { 286 free(disks); 287 return (1); 288 } 289 290 if (verbose) { 291 printf("ccd%d: %d components ", ccio.ccio_unit, 292 ccio.ccio_ndisks); 293 for (i = 0; i < ccio.ccio_ndisks; ++i) { 294 if ((cp2 = strrchr(disks[i], '/')) != NULL) 295 ++cp2; 296 else 297 cp2 = disks[i]; 298 printf("%c%s%c", 299 i == 0 ? '(' : ' ', cp2, 300 i == ccio.ccio_ndisks - 1 ? ')' : ','); 301 } 302 printf(", %lu blocks ", (u_long)ccio.ccio_size); 303 if (ccio.ccio_ileave != 0) 304 printf("interleaved at %d blocks\n", ccio.ccio_ileave); 305 else 306 printf("concatenated\n"); 307 } 308 309 free(disks); 310 return (0); 311 } 312 313 static int 314 do_all(int action) 315 { 316 FILE *f; 317 char line[_POSIX2_LINE_MAX]; 318 char *cp, **argv; 319 int argc, rval; 320 gid_t egid; 321 322 rval = 0; 323 egid = getegid(); 324 setegid(getgid()); 325 if ((f = fopen(ccdconf, "r")) == NULL) { 326 setegid(egid); 327 warn("fopen: %s", ccdconf); 328 return (1); 329 } 330 setegid(egid); 331 332 while (fgets(line, sizeof(line), f) != NULL) { 333 argc = 0; 334 argv = NULL; 335 ++lineno; 336 if ((cp = strrchr(line, '\n')) != NULL) 337 *cp = '\0'; 338 339 /* Break up the line and pass it's contents to do_single(). */ 340 if (line[0] == '\0') 341 goto end_of_line; 342 for (cp = line; (cp = strtok(cp, " \t")) != NULL; cp = NULL) { 343 if (*cp == '#') 344 break; 345 if ((argv = realloc(argv, 346 sizeof(char *) * ++argc)) == NULL) { 347 warnx("no memory to configure ccds"); 348 return (1); 349 } 350 argv[argc - 1] = cp; 351 /* 352 * If our action is to unconfigure all, then pass 353 * just the first token to do_single() and ignore 354 * the rest. Since this will be encountered on 355 * our first pass through the line, the Right 356 * Thing will happen. 357 */ 358 if (action == CCD_UNCONFIGALL) { 359 if (do_single(argc, argv, action)) 360 rval = 1; 361 goto end_of_line; 362 } 363 } 364 if (argc != 0) 365 if (do_single(argc, argv, action)) 366 rval = 1; 367 368 end_of_line: 369 if (argv != NULL) 370 free(argv); 371 } 372 373 fclose(f); 374 return (rval); 375 } 376 377 static int 378 checkdev(char *path) 379 { 380 struct stat st; 381 382 if (stat(path, &st) != 0) 383 return (errno); 384 385 if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) 386 return (EINVAL); 387 388 return (0); 389 } 390 391 static int 392 pathtounit(char *path, int *unitp) 393 { 394 struct stat st; 395 int maxpartitions; 396 397 if (stat(path, &st) != 0) 398 return (errno); 399 400 if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode)) 401 return (EINVAL); 402 403 if ((maxpartitions = getmaxpartitions()) < 0) 404 return (errno); 405 406 *unitp = minor(st.st_rdev) / maxpartitions; 407 408 return (0); 409 } 410 411 static char * 412 resolve_ccdname(char *name) 413 { 414 char c, *path; 415 size_t len; 416 int rawpart; 417 418 if (name[0] == '/' || name[0] == '.') { 419 /* Assume they gave the correct pathname. */ 420 return (strdup(name)); 421 } 422 423 len = strlen(name); 424 if (len > 0) 425 c = name[len - 1]; 426 else 427 c = '\0'; 428 429 if (isdigit(c)) { 430 if ((rawpart = getrawpartition()) < 0) 431 return (NULL); 432 asprintf(&path, "%s%s%c", _PATH_DEV, name, 'a' + rawpart); 433 } else { 434 asprintf(&path, "%s%s", _PATH_DEV, name); 435 } 436 437 return (path); 438 } 439 440 static int 441 do_io(char *path, u_long cmd, struct ccd_ioctl *cciop) 442 { 443 int fd; 444 char *cp; 445 446 if ((fd = open(path, O_RDWR, 0640)) < 0) { 447 warn("open: %s", path); 448 return (1); 449 } 450 451 if (ioctl(fd, cmd, cciop) < 0) { 452 switch (cmd) { 453 case CCDIOCSET: 454 cp = "CCDIOCSET"; 455 break; 456 457 case CCDIOCCLR: 458 cp = "CCDIOCCLR"; 459 break; 460 461 default: 462 cp = "unknown"; 463 } 464 warn("ioctl (%s): %s", cp, path); 465 return (1); 466 } 467 468 return (0); 469 } 470 471 #define KVM_ABORT(kd, str) { \ 472 kvm_close((kd)); \ 473 warnx("%s", (str)); \ 474 warnx("%s", kvm_geterr((kd))); \ 475 return (1); \ 476 } 477 478 static int 479 dump_ccd(int argc, char **argv) 480 { 481 char errbuf[_POSIX2_LINE_MAX], *ccd, *cp; 482 struct ccd_softc *cs, *kcs; 483 size_t readsize; 484 int i, error, numccd, numconfiged = 0; 485 kvm_t *kd; 486 487 bzero(errbuf, sizeof(errbuf)); 488 489 if ((kd = kvm_openfiles(kernel, core, NULL, O_RDONLY, 490 errbuf)) == NULL) { 491 warnx("can't open kvm: %s", errbuf); 492 return (1); 493 } 494 495 if (kvm_nlist(kd, nl)) 496 KVM_ABORT(kd, "ccd-related symbols not available"); 497 498 /* Check to see how many ccds are currently configured. */ 499 if (kvm_read(kd, nl[SYM_NUMCCD].n_value, (char *)&numccd, 500 sizeof(numccd)) != sizeof(numccd)) 501 KVM_ABORT(kd, "can't determine number of configured ccds"); 502 503 if (numccd == 0) { 504 printf("ccd driver in kernel, but is uninitialized\n"); 505 goto done; 506 } 507 508 /* Allocate space for the configuration data. */ 509 readsize = numccd * sizeof(struct ccd_softc); 510 if ((cs = malloc(readsize)) == NULL) { 511 warnx("no memory for configuration data"); 512 goto bad; 513 } 514 bzero(cs, readsize); 515 516 /* 517 * Read the ccd configuration data from the kernel and dump 518 * it to stdout. 519 */ 520 if (kvm_read(kd, nl[SYM_CCDSOFTC].n_value, (char *)&kcs, 521 sizeof(kcs)) != sizeof(kcs)) { 522 free(cs); 523 KVM_ABORT(kd, "can't find pointer to configuration data"); 524 } 525 if (kvm_read(kd, (u_long)kcs, (char *)cs, readsize) != readsize) { 526 free(cs); 527 KVM_ABORT(kd, "can't read configuration data"); 528 } 529 530 if (argc == 0) { 531 for (i = 0; i < numccd; ++i) 532 if (cs[i].sc_flags & CCDF_INITED) { 533 ++numconfiged; 534 print_ccd_info(&cs[i], kd); 535 } 536 537 if (numconfiged == 0) 538 printf("no concatenated disks configured\n"); 539 } else { 540 while (argc) { 541 cp = *argv++; --argc; 542 if ((ccd = resolve_ccdname(cp)) == NULL) { 543 warnx("invalid ccd name: %s", cp); 544 continue; 545 } 546 if ((error = pathtounit(ccd, &i)) != 0) { 547 warnx("%s: %s", ccd, strerror(error)); 548 continue; 549 } 550 if (i >= numccd) { 551 warnx("ccd%d not configured", i); 552 continue; 553 } 554 if (cs[i].sc_flags & CCDF_INITED) 555 print_ccd_info(&cs[i], kd); 556 else 557 printf("ccd%d not configured\n", i); 558 } 559 } 560 561 free(cs); 562 563 done: 564 kvm_close(kd); 565 return (0); 566 567 bad: 568 kvm_close(kd); 569 return (1); 570 } 571 572 static void 573 print_ccd_info(struct ccd_softc *cs, kvm_t *kd) 574 { 575 static int header_printed = 0; 576 struct ccdcinfo *cip; 577 size_t readsize; 578 char path[MAXPATHLEN]; 579 int i; 580 581 if (header_printed == 0 && verbose) { 582 printf("# ccd\t\tileave\tflags\tcompnent devices\n"); 583 header_printed = 1; 584 } 585 586 readsize = cs->sc_nccdisks * sizeof(struct ccdcinfo); 587 if ((cip = malloc(readsize)) == NULL) { 588 warn("ccd%d: can't allocate memory for component info", 589 cs->sc_unit); 590 return; 591 } 592 bzero(cip, readsize); 593 594 /* Dump out softc information. */ 595 printf("ccd%d\t\t%d\t%d\t", cs->sc_unit, cs->sc_ileave, 596 cs->sc_cflags & CCDF_USERMASK); 597 fflush(stdout); 598 599 /* Read in the component info. */ 600 if (kvm_read(kd, (u_long)cs->sc_cinfo, (char *)cip, 601 readsize) != readsize) { 602 printf("\n"); 603 warnx("can't read component info"); 604 warnx("%s", kvm_geterr(kd)); 605 goto done; 606 } 607 608 /* Read component pathname and display component info. */ 609 for (i = 0; i < cs->sc_nccdisks; ++i) { 610 if (kvm_read(kd, (u_long)cip[i].ci_path, (char *)path, 611 cip[i].ci_pathlen) != cip[i].ci_pathlen) { 612 printf("\n"); 613 warnx("can't read component pathname"); 614 warnx("%s", kvm_geterr(kd)); 615 goto done; 616 } 617 printf((i + 1 < cs->sc_nccdisks) ? "%s " : "%s\n", path); 618 fflush(stdout); 619 } 620 621 done: 622 free(cip); 623 } 624 625 static int 626 getmaxpartitions(void) 627 { 628 return (MAXPARTITIONS); 629 } 630 631 static int 632 getrawpartition(void) 633 { 634 return (RAW_PART); 635 } 636 637 static int 638 flags_to_val(char *flags) 639 { 640 char *cp, *tok; 641 int i, tmp, val = ~CCDF_USERMASK; 642 size_t flagslen; 643 644 /* 645 * The most common case is that of NIL flags, so check for 646 * those first. 647 */ 648 if (strcmp("none", flags) == 0 || strcmp("0x0", flags) == 0 || 649 strcmp("0", flags) == 0) 650 return (0); 651 652 flagslen = strlen(flags); 653 654 /* Check for values represented by strings. */ 655 if ((cp = strdup(flags)) == NULL) 656 err(1, "no memory to parse flags"); 657 tmp = 0; 658 for (tok = cp; (tok = strtok(tok, ",")) != NULL; tok = NULL) { 659 for (i = 0; flagvaltab[i].fv_flag != NULL; ++i) 660 if (strcmp(tok, flagvaltab[i].fv_flag) == 0) 661 break; 662 if (flagvaltab[i].fv_flag == NULL) { 663 free(cp); 664 goto bad_string; 665 } 666 tmp |= flagvaltab[i].fv_val; 667 } 668 669 /* If we get here, the string was ok. */ 670 free(cp); 671 val = tmp; 672 goto out; 673 674 bad_string: 675 676 /* Check for values represented in hex. */ 677 if (flagslen > 2 && flags[0] == '0' && flags[1] == 'x') { 678 errno = 0; /* to check for ERANGE */ 679 val = (int)strtol(&flags[2], &cp, 16); 680 if ((errno == ERANGE) || (*cp != '\0')) 681 return (-1); 682 goto out; 683 } 684 685 /* Check for values represented in decimal. */ 686 errno = 0; /* to check for ERANGE */ 687 val = (int)strtol(flags, &cp, 10); 688 if ((errno == ERANGE) || (*cp != '\0')) 689 return (-1); 690 691 out: 692 return (((val & ~CCDF_USERMASK) == 0) ? val : -1); 693 } 694 695 static void 696 usage(void) 697 { 698 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n", 699 "usage: ccdconfig [-cv] ccd ileave [flags] dev [...]", 700 " ccdconfig -C [-v] [-f config_file]", 701 " ccdconfig -u [-v] ccd [...]", 702 " ccdconfig -U [-v] [-f config_file]", 703 " ccdconfig -g [-M core] [-N system] [ccd [...]]"); 704 exit(1); 705 } 706 707 /* Local Variables: */ 708 /* c-argdecl-indent: 8 */ 709 /* c-indent-level: 8 */ 710 /* End: */ 711