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 1.4 2003/11/01 17:15:57 drhodus 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 (void)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, newlen; 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 c = name[len - 1]; 425 426 newlen = len + 8; 427 if ((path = malloc(newlen)) == NULL) 428 return (NULL); 429 bzero(path, newlen); 430 431 if (isdigit(c)) { 432 if ((rawpart = getrawpartition()) < 0) { 433 free(path); 434 return (NULL); 435 } 436 (void)sprintf(path, "%s%s%c", _PATH_DEV, name, 'a' + rawpart); 437 } else 438 (void)sprintf(path, "%s%s", _PATH_DEV, name); 439 440 return (path); 441 } 442 443 static int 444 do_io(char *path, u_long cmd, struct ccd_ioctl *cciop) 445 { 446 int fd; 447 char *cp; 448 449 if ((fd = open(path, O_RDWR, 0640)) < 0) { 450 warn("open: %s", path); 451 return (1); 452 } 453 454 if (ioctl(fd, cmd, cciop) < 0) { 455 switch (cmd) { 456 case CCDIOCSET: 457 cp = "CCDIOCSET"; 458 break; 459 460 case CCDIOCCLR: 461 cp = "CCDIOCCLR"; 462 break; 463 464 default: 465 cp = "unknown"; 466 } 467 warn("ioctl (%s): %s", cp, path); 468 return (1); 469 } 470 471 return (0); 472 } 473 474 #define KVM_ABORT(kd, str) { \ 475 (void)kvm_close((kd)); \ 476 warnx("%s", (str)); \ 477 warnx("%s", kvm_geterr((kd))); \ 478 return (1); \ 479 } 480 481 static int 482 dump_ccd(int argc, char **argv) 483 { 484 char errbuf[_POSIX2_LINE_MAX], *ccd, *cp; 485 struct ccd_softc *cs, *kcs; 486 size_t readsize; 487 int i, error, numccd, numconfiged = 0; 488 kvm_t *kd; 489 490 bzero(errbuf, sizeof(errbuf)); 491 492 if ((kd = kvm_openfiles(kernel, core, NULL, O_RDONLY, 493 errbuf)) == NULL) { 494 warnx("can't open kvm: %s", errbuf); 495 return (1); 496 } 497 498 if (kvm_nlist(kd, nl)) 499 KVM_ABORT(kd, "ccd-related symbols not available"); 500 501 /* Check to see how many ccds are currently configured. */ 502 if (kvm_read(kd, nl[SYM_NUMCCD].n_value, (char *)&numccd, 503 sizeof(numccd)) != sizeof(numccd)) 504 KVM_ABORT(kd, "can't determine number of configured ccds"); 505 506 if (numccd == 0) { 507 printf("ccd driver in kernel, but is uninitialized\n"); 508 goto done; 509 } 510 511 /* Allocate space for the configuration data. */ 512 readsize = numccd * sizeof(struct ccd_softc); 513 if ((cs = malloc(readsize)) == NULL) { 514 warnx("no memory for configuration data"); 515 goto bad; 516 } 517 bzero(cs, readsize); 518 519 /* 520 * Read the ccd configuration data from the kernel and dump 521 * it to stdout. 522 */ 523 if (kvm_read(kd, nl[SYM_CCDSOFTC].n_value, (char *)&kcs, 524 sizeof(kcs)) != sizeof(kcs)) { 525 free(cs); 526 KVM_ABORT(kd, "can't find pointer to configuration data"); 527 } 528 if (kvm_read(kd, (u_long)kcs, (char *)cs, readsize) != readsize) { 529 free(cs); 530 KVM_ABORT(kd, "can't read configuration data"); 531 } 532 533 if (argc == 0) { 534 for (i = 0; i < numccd; ++i) 535 if (cs[i].sc_flags & CCDF_INITED) { 536 ++numconfiged; 537 print_ccd_info(&cs[i], kd); 538 } 539 540 if (numconfiged == 0) 541 printf("no concatenated disks configured\n"); 542 } else { 543 while (argc) { 544 cp = *argv++; --argc; 545 if ((ccd = resolve_ccdname(cp)) == NULL) { 546 warnx("invalid ccd name: %s", cp); 547 continue; 548 } 549 if ((error = pathtounit(ccd, &i)) != 0) { 550 warnx("%s: %s", ccd, strerror(error)); 551 continue; 552 } 553 if (i >= numccd) { 554 warnx("ccd%d not configured", i); 555 continue; 556 } 557 if (cs[i].sc_flags & CCDF_INITED) 558 print_ccd_info(&cs[i], kd); 559 else 560 printf("ccd%d not configured\n", i); 561 } 562 } 563 564 free(cs); 565 566 done: 567 (void)kvm_close(kd); 568 return (0); 569 570 bad: 571 (void)kvm_close(kd); 572 return (1); 573 } 574 575 static void 576 print_ccd_info(struct ccd_softc *cs, kvm_t *kd) 577 { 578 static int header_printed = 0; 579 struct ccdcinfo *cip; 580 size_t readsize; 581 char path[MAXPATHLEN]; 582 int i; 583 584 if (header_printed == 0 && verbose) { 585 printf("# ccd\t\tileave\tflags\tcompnent devices\n"); 586 header_printed = 1; 587 } 588 589 readsize = cs->sc_nccdisks * sizeof(struct ccdcinfo); 590 if ((cip = malloc(readsize)) == NULL) { 591 warn("ccd%d: can't allocate memory for component info", 592 cs->sc_unit); 593 return; 594 } 595 bzero(cip, readsize); 596 597 /* Dump out softc information. */ 598 printf("ccd%d\t\t%d\t%d\t", cs->sc_unit, cs->sc_ileave, 599 cs->sc_cflags & CCDF_USERMASK); 600 fflush(stdout); 601 602 /* Read in the component info. */ 603 if (kvm_read(kd, (u_long)cs->sc_cinfo, (char *)cip, 604 readsize) != readsize) { 605 printf("\n"); 606 warnx("can't read component info"); 607 warnx("%s", kvm_geterr(kd)); 608 goto done; 609 } 610 611 /* Read component pathname and display component info. */ 612 for (i = 0; i < cs->sc_nccdisks; ++i) { 613 if (kvm_read(kd, (u_long)cip[i].ci_path, (char *)path, 614 cip[i].ci_pathlen) != cip[i].ci_pathlen) { 615 printf("\n"); 616 warnx("can't read component pathname"); 617 warnx("%s", kvm_geterr(kd)); 618 goto done; 619 } 620 printf((i + 1 < cs->sc_nccdisks) ? "%s " : "%s\n", path); 621 fflush(stdout); 622 } 623 624 done: 625 free(cip); 626 } 627 628 static int 629 getmaxpartitions(void) 630 { 631 return (MAXPARTITIONS); 632 } 633 634 static int 635 getrawpartition(void) 636 { 637 return (RAW_PART); 638 } 639 640 static int 641 flags_to_val(char *flags) 642 { 643 char *cp, *tok; 644 int i, tmp, val = ~CCDF_USERMASK; 645 size_t flagslen; 646 647 /* 648 * The most common case is that of NIL flags, so check for 649 * those first. 650 */ 651 if (strcmp("none", flags) == 0 || strcmp("0x0", flags) == 0 || 652 strcmp("0", flags) == 0) 653 return (0); 654 655 flagslen = strlen(flags); 656 657 /* Check for values represented by strings. */ 658 if ((cp = strdup(flags)) == NULL) 659 err(1, "no memory to parse flags"); 660 tmp = 0; 661 for (tok = cp; (tok = strtok(tok, ",")) != NULL; tok = NULL) { 662 for (i = 0; flagvaltab[i].fv_flag != NULL; ++i) 663 if (strcmp(tok, flagvaltab[i].fv_flag) == 0) 664 break; 665 if (flagvaltab[i].fv_flag == NULL) { 666 free(cp); 667 goto bad_string; 668 } 669 tmp |= flagvaltab[i].fv_val; 670 } 671 672 /* If we get here, the string was ok. */ 673 free(cp); 674 val = tmp; 675 goto out; 676 677 bad_string: 678 679 /* Check for values represented in hex. */ 680 if (flagslen > 2 && flags[0] == '0' && flags[1] == 'x') { 681 errno = 0; /* to check for ERANGE */ 682 val = (int)strtol(&flags[2], &cp, 16); 683 if ((errno == ERANGE) || (*cp != '\0')) 684 return (-1); 685 goto out; 686 } 687 688 /* Check for values represented in decimal. */ 689 errno = 0; /* to check for ERANGE */ 690 val = (int)strtol(flags, &cp, 10); 691 if ((errno == ERANGE) || (*cp != '\0')) 692 return (-1); 693 694 out: 695 return (((val & ~CCDF_USERMASK) == 0) ? val : -1); 696 } 697 698 static void 699 usage(void) 700 { 701 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n", 702 "usage: ccdconfig [-cv] ccd ileave [flags] dev [...]", 703 " ccdconfig -C [-v] [-f config_file]", 704 " ccdconfig -u [-v] ccd [...]", 705 " ccdconfig -U [-v] [-f config_file]", 706 " ccdconfig -g [-M core] [-N system] [ccd [...]]"); 707 exit(1); 708 } 709 710 /* Local Variables: */ 711 /* c-argdecl-indent: 8 */ 712 /* c-indent-level: 8 */ 713 /* End: */ 714