1 /* 2 * Copyright (c) 1993 University of Utah. 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, 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 * from: Utah $Hdr: vnconfig.c 1.1 93/12/15$ 35 * 36 * @(#)vnconfig.c 8.1 (Berkeley) 12/15/93 37 * $FreeBSD: src/usr.sbin/vnconfig/vnconfig.c,v 1.13.2.7 2003/06/02 09:10:27 maxim Exp $ 38 * $DragonFly: src/usr.sbin/vnconfig/vnconfig.c,v 1.15 2008/07/27 22:36:01 thomas Exp $ 39 */ 40 41 #include <ctype.h> 42 #include <err.h> 43 #include <errno.h> 44 #include <paths.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <fcntl.h> 48 #include <string.h> 49 #include <unistd.h> 50 #include <sys/param.h> 51 #include <sys/ioctl.h> 52 #include <sys/linker.h> 53 #include <sys/mount.h> 54 #include <sys/module.h> 55 #include <sys/stat.h> 56 #include <sys/vnioctl.h> 57 #include <vfs/ufs/ufsmount.h> 58 59 #define LINESIZE 1024 60 #define ZBUFSIZE 32768 61 62 struct vndisk { 63 char *dev; 64 char *file; 65 char *autolabel; 66 int flags; 67 int64_t size; 68 char *oarg; 69 } *vndisks; 70 71 #define VN_CONFIG 0x01 72 #define VN_UNCONFIG 0x02 73 #define VN_ENABLE 0x04 74 #define VN_DISABLE 0x08 75 #define VN_SWAP 0x10 76 #define VN_MOUNTRO 0x20 77 #define VN_MOUNTRW 0x40 78 #define VN_IGNORE 0x80 79 #define VN_SET 0x100 80 #define VN_RESET 0x200 81 #define VN_TRUNCATE 0x400 82 #define VN_ZERO 0x800 83 84 int nvndisks; 85 86 int all = 0; 87 int verbose = 0; 88 int global = 0; 89 int listopt = 0; 90 u_long setopt = 0; 91 u_long resetopt = 0; 92 const char *configfile; 93 94 int config(struct vndisk *); 95 void getoptions(struct vndisk *, const char *); 96 int getinfo(const char *vname); 97 char *rawdevice(const char *); 98 void readconfig(int); 99 static void usage(void); 100 static int64_t getsize(const char *arg); 101 static void do_autolabel(const char *dev, const char *label); 102 int what_opt(const char *, u_long *); 103 104 int 105 main(int argc, char *argv[]) 106 { 107 int i, rv; 108 int flags = 0; 109 int64_t size = 0; 110 char *autolabel = NULL; 111 char *s; 112 113 configfile = _PATH_VNTAB; 114 while ((i = getopt(argc, argv, "acdef:glr:s:S:TZL:uv")) != -1) 115 switch (i) { 116 117 /* all -- use config file */ 118 case 'a': 119 all++; 120 break; 121 122 /* configure */ 123 case 'c': 124 flags |= VN_CONFIG; 125 flags &= ~VN_UNCONFIG; 126 break; 127 128 /* disable */ 129 case 'd': 130 flags |= VN_DISABLE; 131 flags &= ~VN_ENABLE; 132 break; 133 134 /* enable */ 135 case 'e': 136 flags |= (VN_ENABLE|VN_CONFIG); 137 flags &= ~(VN_DISABLE|VN_UNCONFIG); 138 break; 139 140 /* alternate config file */ 141 case 'f': 142 configfile = optarg; 143 break; 144 145 /* fiddle global options */ 146 case 'g': 147 global = 1 - global; 148 break; 149 150 /* reset options */ 151 case 'r': 152 for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) { 153 if (what_opt(s, &resetopt)) 154 errx(1, "invalid options '%s'", s); 155 } 156 flags |= VN_RESET; 157 break; 158 159 case 'l': 160 listopt = 1; 161 break; 162 163 /* set options */ 164 case 's': 165 for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) { 166 if (what_opt(s, &setopt)) 167 errx(1, "invalid options '%s'", s); 168 } 169 flags |= VN_SET; 170 break; 171 172 /* unconfigure */ 173 case 'u': 174 flags |= (VN_DISABLE|VN_UNCONFIG); 175 flags &= ~(VN_ENABLE|VN_CONFIG); 176 break; 177 178 /* verbose */ 179 case 'v': 180 verbose++; 181 break; 182 183 case 'S': 184 size = getsize(optarg); 185 flags |= VN_CONFIG; 186 flags &= ~VN_UNCONFIG; 187 break; 188 189 case 'T': 190 flags |= VN_TRUNCATE; 191 break; 192 193 case 'Z': 194 flags |= VN_ZERO; 195 break; 196 197 case 'L': 198 autolabel = optarg; 199 break; 200 201 default: 202 usage(); 203 } 204 205 if (modfind("vn") < 0) 206 if (kldload("vn") < 0 || modfind("vn") < 0) 207 warnx( "cannot find or load \"vn\" kernel module"); 208 209 rv = 0; 210 if (listopt) { 211 if(argc > optind) 212 while(argc > optind) 213 rv += getinfo( argv[optind++]); 214 else { 215 rv = getinfo( NULL ); 216 } 217 exit(rv); 218 } 219 220 if (flags == 0) 221 flags = VN_CONFIG; 222 if (all) { 223 readconfig(flags); 224 } else { 225 vndisks = calloc(sizeof(struct vndisk), 1); 226 if (argc < optind + 1) 227 usage(); 228 vndisks[0].dev = argv[optind++]; 229 vndisks[0].file = argv[optind++]; /* may be NULL */ 230 vndisks[0].flags = flags; 231 vndisks[0].size = size; 232 vndisks[0].autolabel = autolabel; 233 if (optind < argc) 234 getoptions(&vndisks[0], argv[optind]); 235 nvndisks = 1; 236 } 237 rv = 0; 238 for (i = 0; i < nvndisks; i++) 239 rv += config(&vndisks[i]); 240 exit(rv); 241 } 242 243 int 244 what_opt(const char *str, u_long *p) 245 { 246 if (!strcmp(str,"reserve")) { *p |= VN_RESERVE; return 0; } 247 if (!strcmp(str,"labels")) { return 0; } /* deprecated */ 248 if (!strcmp(str,"follow")) { *p |= VN_FOLLOW; return 0; } 249 if (!strcmp(str,"debug")) { *p |= VN_DEBUG; return 0; } 250 if (!strcmp(str,"io")) { *p |= VN_IO; return 0; } 251 if (!strcmp(str,"all")) { *p |= ~0; return 0; } 252 if (!strcmp(str,"none")) { *p |= 0; return 0; } 253 return 1; 254 } 255 256 /* 257 * 258 * GETINFO 259 * 260 * Print vnode disk information to stdout for the device at 261 * path 'vname', or all existing 'vn' devices if none is given. 262 * Any 'vn' devices must exist under /dev in order to be queried. 263 * 264 * Todo: correctly use vm_secsize for swap-backed vn's .. 265 */ 266 267 int 268 getinfo( const char *vname ) 269 { 270 int i = 0, vd, printlim = 0; 271 char vnpath[PATH_MAX]; 272 const char *tmp; 273 274 struct vn_user vnu; 275 struct stat sb; 276 277 if (vname == NULL) { 278 printlim = 1024; 279 } else { 280 tmp = vname; 281 while (*tmp != 0) { 282 if(isdigit(*tmp)){ 283 i = atoi(tmp); 284 printlim = i + 1; 285 break; 286 } 287 tmp++; 288 } 289 if (*tmp == '\0') 290 errx(1, "unknown vn device: %s", vname); 291 } 292 293 snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", i); 294 295 vd = open(vnpath, O_RDONLY); 296 if (vd < 0) 297 err(1, "open: %s", vnpath); 298 299 for (; i<printlim; i++) { 300 301 bzero(&vnpath, sizeof(vnpath)); 302 bzero(&sb, sizeof(struct stat)); 303 bzero(&vnu, sizeof(struct vn_user)); 304 305 vnu.vnu_unit = i; 306 307 snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", vnu.vnu_unit); 308 309 if(stat(vnpath, &sb) < 0) { 310 break; 311 } 312 else { 313 if (ioctl(vd, VNIOCGET, &vnu) == -1) { 314 warn("vn%d: ioctl", i); 315 continue; 316 } 317 318 fprintf(stdout, "vn%d: ", vnu.vnu_unit); 319 320 if (vnu.vnu_file[0] == 0) 321 fprintf(stdout, "not in use\n"); 322 else if ((strcmp(vnu.vnu_file, _VN_USER_SWAP)) == 0) 323 fprintf(stdout, 324 "consuming %jd VM pages\n", 325 (intmax_t)vnu.vnu_size); 326 else 327 fprintf(stdout, 328 "covering %s on %s, inode %ju\n", 329 vnu.vnu_file, 330 devname(vnu.vnu_dev, S_IFBLK), 331 (uintmax_t)vnu.vnu_ino); 332 } 333 } 334 close(vd); 335 return 0; 336 } 337 338 int 339 config(struct vndisk *vnp) 340 { 341 char *dev, *file, *rdev, *oarg; 342 FILE *f; 343 struct vn_ioctl vnio; 344 int flags, pgsize, rv, status; 345 u_long l; 346 347 pgsize = getpagesize(); 348 349 status = rv = 0; 350 351 /* 352 * Prepend "/dev/" to the specified device name, if necessary. 353 * Operate on vnp->dev because it is used later. 354 */ 355 if (vnp->dev[0] != '/' && vnp->dev[0] != '.') 356 asprintf(&vnp->dev, "%s%s", _PATH_DEV, vnp->dev); 357 dev = vnp->dev; 358 file = vnp->file; 359 flags = vnp->flags; 360 oarg = vnp->oarg; 361 362 if (flags & VN_IGNORE) 363 return(0); 364 365 /* 366 * When a regular file has been specified, do any requested setup 367 * of the file. Truncation (also creates the file if necessary), 368 * sizing, and zeroing. 369 */ 370 371 if (file && vnp->size != 0 && (flags & VN_CONFIG)) { 372 int fd; 373 struct stat st; 374 375 if (flags & VN_TRUNCATE) 376 fd = open(file, O_RDWR|O_CREAT|O_TRUNC, 0600); 377 else 378 fd = open(file, O_RDWR); 379 if (fd >= 0 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) { 380 if (st.st_size < vnp->size * pgsize) 381 ftruncate(fd, vnp->size * pgsize); 382 if (vnp->size != 0) 383 st.st_size = vnp->size * pgsize; 384 385 if (flags & VN_ZERO) { 386 char *buf = malloc(ZBUFSIZE); 387 bzero(buf, ZBUFSIZE); 388 while (st.st_size > 0) { 389 int n = (st.st_size > ZBUFSIZE) ? 390 ZBUFSIZE : (int)st.st_size; 391 if (write(fd, buf, n) != n) { 392 ftruncate(fd, 0); 393 printf("Unable to ZERO file %s\n", file); 394 return(0); 395 } 396 st.st_size -= (off_t)n; 397 } 398 } 399 close(fd); 400 } else { 401 printf("Unable to open file %s\n", file); 402 return(0); 403 } 404 } else if (file == NULL && vnp->size == 0 && (flags & VN_CONFIG)) { 405 warnx("specify regular filename or swap size"); 406 return (0); 407 } 408 409 rdev = rawdevice(dev); 410 f = fopen(rdev, "rw"); 411 if (f == NULL) { 412 warn("%s", dev); 413 return(1); 414 } 415 if (!strcmp(rdev, "/dev/vn")) { 416 printf("%s\n", fdevname(fileno(f))); 417 rv = asprintf(&dev, "%s%s", _PATH_DEV, fdevname(fileno(f))); 418 if (rv < 0) 419 dev = fdevname(fileno(f)); 420 } 421 422 vnio.vn_file = file; 423 vnio.vn_size = vnp->size; /* non-zero only if swap backed */ 424 425 /* 426 * Disable the device 427 */ 428 if (flags & VN_DISABLE) { 429 if (flags & (VN_MOUNTRO|VN_MOUNTRW)) { 430 rv = unmount(oarg, 0); 431 if (rv) { 432 status--; 433 if (errno == EBUSY) 434 flags &= ~VN_UNCONFIG; 435 if ((flags & VN_UNCONFIG) == 0) 436 warn("umount"); 437 } else if (verbose) 438 printf("%s: unmounted\n", dev); 439 } 440 } 441 /* 442 * Clear (un-configure) the device 443 */ 444 if (flags & VN_UNCONFIG) { 445 rv = ioctl(fileno(f), VNIOCDETACH, &vnio); 446 if (rv) { 447 if (errno == ENODEV) { 448 if (verbose) 449 printf("%s: not configured\n", dev); 450 rv = 0; 451 } else { 452 status--; 453 warn("VNIOCDETACH"); 454 } 455 } else if (verbose) 456 printf("%s: cleared\n", dev); 457 } 458 /* 459 * Set specified options 460 */ 461 if (flags & VN_SET) { 462 l = setopt; 463 if (global) 464 rv = ioctl(fileno(f), VNIOCGSET, &l); 465 else 466 rv = ioctl(fileno(f), VNIOCUSET, &l); 467 if (rv) { 468 status--; 469 warn("VNIO[GU]SET"); 470 } else if (verbose) 471 printf("%s: flags now=%08lx\n",dev,l); 472 } 473 /* 474 * Reset specified options 475 */ 476 if (flags & VN_RESET) { 477 l = resetopt; 478 if (global) 479 rv = ioctl(fileno(f), VNIOCGCLEAR, &l); 480 else 481 rv = ioctl(fileno(f), VNIOCUCLEAR, &l); 482 if (rv) { 483 status--; 484 warn("VNIO[GU]CLEAR"); 485 } else if (verbose) 486 printf("%s: flags now=%08lx\n",dev,l); 487 } 488 /* 489 * Configure the device 490 */ 491 if (flags & VN_CONFIG) { 492 rv = ioctl(fileno(f), VNIOCATTACH, &vnio); 493 if (rv) { 494 status--; 495 warn("VNIOCATTACH"); 496 flags &= ~VN_ENABLE; 497 } else { 498 if (verbose) { 499 printf("%s: %s, ", dev, file); 500 if (vnp->size != 0) { 501 printf("%jd bytes mapped\n", (intmax_t)vnio.vn_size); 502 } else { 503 printf("complete file mapped\n"); 504 } 505 } 506 /* 507 * autolabel 508 */ 509 if (vnp->autolabel) { 510 do_autolabel(vnp->dev, vnp->autolabel); 511 } 512 } 513 } 514 /* 515 * Set an option 516 */ 517 if (flags & VN_SET) { 518 l = setopt; 519 if (global) 520 rv = ioctl(fileno(f), VNIOCGSET, &l); 521 else 522 rv = ioctl(fileno(f), VNIOCUSET, &l); 523 if (rv) { 524 status--; 525 warn("VNIO[GU]SET"); 526 } else if (verbose) 527 printf("%s: flags now=%08lx\n",dev,l); 528 } 529 /* 530 * Reset an option 531 */ 532 if (flags & VN_RESET) { 533 l = resetopt; 534 if (global) 535 rv = ioctl(fileno(f), VNIOCGCLEAR, &l); 536 else 537 rv = ioctl(fileno(f), VNIOCUCLEAR, &l); 538 if (rv) { 539 status--; 540 warn("VNIO[GU]CLEAR"); 541 } else if (verbose) 542 printf("%s: flags now=%08lx\n",dev,l); 543 } 544 545 /* 546 * Close the device now, as we may want to mount it. 547 */ 548 fclose(f); 549 550 /* 551 * Enable special functions on the device 552 */ 553 if (flags & VN_ENABLE) { 554 if (flags & VN_SWAP) { 555 rv = swapon(dev); 556 if (rv) { 557 status--; 558 warn("swapon"); 559 } 560 else if (verbose) 561 printf("%s: swapping enabled\n", dev); 562 } 563 if (flags & (VN_MOUNTRO|VN_MOUNTRW)) { 564 struct ufs_args args; 565 int mflags; 566 567 args.fspec = dev; 568 mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0; 569 rv = mount("ufs", oarg, mflags, &args); 570 if (rv) { 571 status--; 572 warn("mount"); 573 } 574 else if (verbose) 575 printf("%s: mounted on %s\n", dev, oarg); 576 } 577 } 578 /* done: */ 579 fflush(stdout); 580 return(status < 0); 581 } 582 583 #define EOL(c) ((c) == '\0' || (c) == '\n') 584 #define WHITE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n') 585 586 void 587 readconfig(int flags) 588 { 589 char buf[LINESIZE]; 590 FILE *f; 591 char *cp, *sp; 592 int ix; 593 int ax; 594 595 f = fopen(configfile, "r"); 596 if (f == NULL) 597 err(1, "%s", configfile); 598 ix = 0; /* number of elements */ 599 ax = 0; /* allocated elements */ 600 while (fgets(buf, LINESIZE, f) != NULL) { 601 cp = buf; 602 if (*cp == '#') 603 continue; 604 while (!EOL(*cp) && WHITE(*cp)) 605 cp++; 606 if (EOL(*cp)) 607 continue; 608 sp = cp; 609 while (!EOL(*cp) && !WHITE(*cp)) 610 cp++; 611 if (EOL(*cp)) 612 continue; 613 *cp++ = '\0'; 614 615 if (ix == ax) { 616 ax = ax + 16; 617 vndisks = realloc(vndisks, ax * sizeof(struct vndisk)); 618 bzero(&vndisks[ix], (ax - ix) * sizeof(struct vndisk)); 619 } 620 vndisks[ix].dev = malloc(cp - sp); 621 strcpy(vndisks[ix].dev, sp); 622 while (!EOL(*cp) && WHITE(*cp)) 623 cp++; 624 if (EOL(*cp)) 625 continue; 626 sp = cp; 627 while (!EOL(*cp) && !WHITE(*cp)) 628 cp++; 629 *cp++ = '\0'; 630 631 if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) { 632 vndisks[ix].size = getsize(sp + 1); 633 } else { 634 vndisks[ix].file = malloc(cp - sp); 635 strcpy(vndisks[ix].file, sp); 636 } 637 638 while (!EOL(*cp) && WHITE(*cp)) 639 cp++; 640 vndisks[ix].flags = flags; 641 if (!EOL(*cp)) { 642 sp = cp; 643 while (!EOL(*cp) && !WHITE(*cp)) 644 cp++; 645 *cp++ = '\0'; 646 getoptions(&vndisks[ix], sp); 647 } 648 nvndisks++; 649 ix++; 650 } 651 } 652 653 void 654 getoptions(struct vndisk *vnp, const char *fstr) 655 { 656 int flags = 0; 657 const char *oarg = NULL; 658 659 if (strcmp(fstr, "swap") == 0) 660 flags |= VN_SWAP; 661 else if (strncmp(fstr, "mount=", 6) == 0) { 662 flags |= VN_MOUNTRW; 663 oarg = &fstr[6]; 664 } else if (strncmp(fstr, "mountrw=", 8) == 0) { 665 flags |= VN_MOUNTRW; 666 oarg = &fstr[8]; 667 } else if (strncmp(fstr, "mountro=", 8) == 0) { 668 flags |= VN_MOUNTRO; 669 oarg = &fstr[8]; 670 } else if (strcmp(fstr, "ignore") == 0) 671 flags |= VN_IGNORE; 672 vnp->flags |= flags; 673 if (oarg) { 674 vnp->oarg = malloc(strlen(oarg) + 1); 675 strcpy(vnp->oarg, oarg); 676 } else 677 vnp->oarg = NULL; 678 } 679 680 char * 681 rawdevice(const char *dev) 682 { 683 char *rawbuf, *dp, *ep; 684 struct stat sb; 685 int len; 686 687 len = strlen(dev); 688 rawbuf = malloc(len + 2); 689 strcpy(rawbuf, dev); 690 if (stat(rawbuf, &sb) != 0 || !S_ISCHR(sb.st_mode)) { 691 dp = strrchr(rawbuf, '/'); 692 if (dp) { 693 for (ep = &rawbuf[len]; ep > dp; --ep) 694 *(ep+1) = *ep; 695 *++ep = 'r'; 696 } 697 } 698 return (rawbuf); 699 } 700 701 static void 702 usage(void) 703 { 704 fprintf(stderr, "%s\n%s\n%s\n%s\n", 705 "usage: vnconfig [-cdeguvTZ] [-s options] [-r options]", 706 " [-S value] special_file [regular_file] [feature]", 707 " vnconfig -a [-cdeguv] [-s options] [-r options] [-f config_file]", 708 " vnconfig -l [special_file ...]"); 709 exit(1); 710 } 711 712 static int64_t 713 getsize(const char *arg) 714 { 715 char *ptr; 716 int pgsize = getpagesize(); 717 int64_t size = strtoq(arg, &ptr, 0); 718 719 switch(tolower(*ptr)) { 720 case 't': 721 /* 722 * GULP! Terabytes. It's actually possible to create 723 * a 7.9 TB VN device, though newfs can't handle any single 724 * filesystem larger then 1 TB. 725 */ 726 size *= 1024; 727 /* fall through */ 728 case 'g': 729 size *= 1024; 730 /* fall through */ 731 default: 732 case 'm': 733 size *= 1024; 734 /* fall through */ 735 case 'k': 736 size *= 1024; 737 /* fall through */ 738 case 'c': 739 break; 740 } 741 size = (size + pgsize - 1) / pgsize; 742 return(size); 743 } 744 745 /* 746 * DO_AUTOLABEL 747 * 748 * Automatically label the device. This will wipe any preexisting 749 * label. 750 */ 751 752 static void 753 do_autolabel(const char *dev __unused, const char *label __unused) 754 { 755 /* XXX not yet implemented */ 756 fprintf(stderr, "autolabel not yet implemented, sorry\n"); 757 exit(1); 758 } 759 760