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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: Utah $Hdr: vnconfig.c 1.1 93/12/15$ 39 * 40 * @(#)vnconfig.c 8.1 (Berkeley) 12/15/93 41 * $FreeBSD: src/usr.sbin/vnconfig/vnconfig.c,v 1.13.2.7 2003/06/02 09:10:27 maxim Exp $ 42 * $DragonFly: src/usr.sbin/vnconfig/vnconfig.c,v 1.15 2008/07/27 22:36:01 thomas Exp $ 43 */ 44 45 #include <ctype.h> 46 #include <err.h> 47 #include <errno.h> 48 #include <paths.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <fcntl.h> 52 #include <string.h> 53 #include <unistd.h> 54 #include <sys/param.h> 55 #include <sys/ioctl.h> 56 #include <sys/linker.h> 57 #include <sys/mount.h> 58 #include <sys/module.h> 59 #include <sys/stat.h> 60 #include <sys/vnioctl.h> 61 #include <vfs/ufs/ufsmount.h> 62 63 #define LINESIZE 1024 64 #define ZBUFSIZE 32768 65 66 struct vndisk { 67 char *dev; 68 char *file; 69 char *autolabel; 70 int flags; 71 int64_t size; 72 char *oarg; 73 } *vndisks; 74 75 #define VN_CONFIG 0x01 76 #define VN_UNCONFIG 0x02 77 #define VN_ENABLE 0x04 78 #define VN_DISABLE 0x08 79 #define VN_SWAP 0x10 80 #define VN_MOUNTRO 0x20 81 #define VN_MOUNTRW 0x40 82 #define VN_IGNORE 0x80 83 #define VN_SET 0x100 84 #define VN_RESET 0x200 85 #define VN_TRUNCATE 0x400 86 #define VN_ZERO 0x800 87 88 int nvndisks; 89 90 int all = 0; 91 int verbose = 0; 92 int global = 0; 93 int listopt = 0; 94 u_long setopt = 0; 95 u_long resetopt = 0; 96 const char *configfile; 97 98 int config(struct vndisk *); 99 void getoptions(struct vndisk *, const char *); 100 int getinfo(const char *vname); 101 char *rawdevice(const char *); 102 void readconfig(int); 103 static void usage(void); 104 static int64_t getsize(const char *arg); 105 static void do_autolabel(const char *dev, const char *label); 106 int what_opt(const char *, u_long *); 107 108 int 109 main(int argc, char *argv[]) 110 { 111 int i, rv; 112 int flags = 0; 113 int64_t size = 0; 114 char *autolabel = NULL; 115 char *s; 116 117 configfile = _PATH_VNTAB; 118 while ((i = getopt(argc, argv, "acdef:glr:s:S:TZL:uv")) != -1) 119 switch (i) { 120 121 /* all -- use config file */ 122 case 'a': 123 all++; 124 break; 125 126 /* configure */ 127 case 'c': 128 flags |= VN_CONFIG; 129 flags &= ~VN_UNCONFIG; 130 break; 131 132 /* disable */ 133 case 'd': 134 flags |= VN_DISABLE; 135 flags &= ~VN_ENABLE; 136 break; 137 138 /* enable */ 139 case 'e': 140 flags |= (VN_ENABLE|VN_CONFIG); 141 flags &= ~(VN_DISABLE|VN_UNCONFIG); 142 break; 143 144 /* alternate config file */ 145 case 'f': 146 configfile = optarg; 147 break; 148 149 /* fiddle global options */ 150 case 'g': 151 global = 1 - global; 152 break; 153 154 /* reset options */ 155 case 'r': 156 for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) { 157 if (what_opt(s, &resetopt)) 158 errx(1, "invalid options '%s'", s); 159 } 160 flags |= VN_RESET; 161 break; 162 163 case 'l': 164 listopt = 1; 165 break; 166 167 /* set options */ 168 case 's': 169 for (s = strtok(optarg, ","); s; s = strtok(NULL, ",")) { 170 if (what_opt(s, &setopt)) 171 errx(1, "invalid options '%s'", s); 172 } 173 flags |= VN_SET; 174 break; 175 176 /* unconfigure */ 177 case 'u': 178 flags |= (VN_DISABLE|VN_UNCONFIG); 179 flags &= ~(VN_ENABLE|VN_CONFIG); 180 break; 181 182 /* verbose */ 183 case 'v': 184 verbose++; 185 break; 186 187 case 'S': 188 size = getsize(optarg); 189 flags |= VN_CONFIG; 190 flags &= ~VN_UNCONFIG; 191 break; 192 193 case 'T': 194 flags |= VN_TRUNCATE; 195 break; 196 197 case 'Z': 198 flags |= VN_ZERO; 199 break; 200 201 case 'L': 202 autolabel = optarg; 203 break; 204 205 default: 206 usage(); 207 } 208 209 if (modfind("vn") < 0) 210 if (kldload("vn") < 0 || modfind("vn") < 0) 211 warnx( "cannot find or load \"vn\" kernel module"); 212 213 rv = 0; 214 if (listopt) { 215 if(argc > optind) 216 while(argc > optind) 217 rv += getinfo( argv[optind++]); 218 else { 219 rv = getinfo( NULL ); 220 } 221 exit(rv); 222 } 223 224 if (flags == 0) 225 flags = VN_CONFIG; 226 if (all) { 227 readconfig(flags); 228 } else { 229 vndisks = calloc(sizeof(struct vndisk), 1); 230 if (argc < optind + 1) 231 usage(); 232 vndisks[0].dev = argv[optind++]; 233 vndisks[0].file = argv[optind++]; /* may be NULL */ 234 vndisks[0].flags = flags; 235 vndisks[0].size = size; 236 vndisks[0].autolabel = autolabel; 237 if (optind < argc) 238 getoptions(&vndisks[0], argv[optind]); 239 nvndisks = 1; 240 } 241 rv = 0; 242 for (i = 0; i < nvndisks; i++) 243 rv += config(&vndisks[i]); 244 exit(rv); 245 } 246 247 int 248 what_opt(const char *str, u_long *p) 249 { 250 if (!strcmp(str,"reserve")) { *p |= VN_RESERVE; return 0; } 251 if (!strcmp(str,"labels")) { return 0; } /* deprecated */ 252 if (!strcmp(str,"follow")) { *p |= VN_FOLLOW; return 0; } 253 if (!strcmp(str,"debug")) { *p |= VN_DEBUG; return 0; } 254 if (!strcmp(str,"io")) { *p |= VN_IO; return 0; } 255 if (!strcmp(str,"all")) { *p |= ~0; return 0; } 256 if (!strcmp(str,"none")) { *p |= 0; return 0; } 257 return 1; 258 } 259 260 /* 261 * 262 * GETINFO 263 * 264 * Print vnode disk information to stdout for the device at 265 * path 'vname', or all existing 'vn' devices if none is given. 266 * Any 'vn' devices must exist under /dev in order to be queried. 267 * 268 * Todo: correctly use vm_secsize for swap-backed vn's .. 269 */ 270 271 int 272 getinfo( const char *vname ) 273 { 274 int i = 0, vd, printlim = 0; 275 char vnpath[PATH_MAX]; 276 const char *tmp; 277 278 struct vn_user vnu; 279 struct stat sb; 280 281 if (vname == NULL) { 282 printlim = 1024; 283 } else { 284 tmp = vname; 285 while (*tmp != 0) { 286 if(isdigit(*tmp)){ 287 i = atoi(tmp); 288 printlim = i + 1; 289 break; 290 } 291 tmp++; 292 } 293 if (*tmp == '\0') 294 errx(1, "unknown vn device: %s", vname); 295 } 296 297 snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", i); 298 299 vd = open(vnpath, O_RDONLY); 300 if (vd < 0) 301 err(1, "open: %s", vnpath); 302 303 for (; i<printlim; i++) { 304 305 bzero(&vnpath, sizeof(vnpath)); 306 bzero(&sb, sizeof(struct stat)); 307 bzero(&vnu, sizeof(struct vn_user)); 308 309 vnu.vnu_unit = i; 310 311 snprintf(vnpath, sizeof(vnpath), "/dev/vn%d", vnu.vnu_unit); 312 313 if(stat(vnpath, &sb) < 0) { 314 break; 315 } 316 else { 317 if (ioctl(vd, VNIOCGET, &vnu) == -1) { 318 if (errno != ENXIO) { 319 if (*vnu.vnu_file == '\0') { 320 fprintf(stdout, 321 "vn%d: ioctl: can't access regular file\n", 322 vnu.vnu_unit); 323 continue; 324 } 325 else { 326 close(vd); 327 err(1, "ioctl: %s", vname); 328 } 329 } 330 } 331 332 fprintf(stdout, "vn%d: ", vnu.vnu_unit); 333 334 if (vnu.vnu_file[0] == 0) 335 fprintf(stdout, "not in use\n"); 336 else if ((strcmp(vnu.vnu_file, _VN_USER_SWAP)) == 0) 337 fprintf(stdout, 338 "consuming %lld VM pages\n", 339 vnu.vnu_size); 340 else 341 fprintf(stdout, 342 "covering %s on %s, inode %ju\n", 343 vnu.vnu_file, 344 devname(vnu.vnu_dev, S_IFBLK), 345 (uintmax_t)vnu.vnu_ino); 346 } 347 } 348 close(vd); 349 return 0; 350 } 351 352 int 353 config(struct vndisk *vnp) 354 { 355 char *dev, *file, *rdev, *oarg; 356 FILE *f; 357 struct vn_ioctl vnio; 358 int flags, pgsize, rv, status; 359 u_long l; 360 361 pgsize = getpagesize(); 362 363 status = rv = 0; 364 365 /* 366 * Prepend "/dev/" to the specified device name, if necessary. 367 * Operate on vnp->dev because it is used later. 368 */ 369 if (vnp->dev[0] != '/' && vnp->dev[0] != '.') 370 asprintf(&vnp->dev, "%s%s", _PATH_DEV, vnp->dev); 371 dev = vnp->dev; 372 file = vnp->file; 373 flags = vnp->flags; 374 oarg = vnp->oarg; 375 376 if (flags & VN_IGNORE) 377 return(0); 378 379 /* 380 * When a regular file has been specified, do any requested setup 381 * of the file. Truncation (also creates the file if necessary), 382 * sizing, and zeroing. 383 */ 384 385 if (file && vnp->size != 0 && (flags & VN_CONFIG)) { 386 int fd; 387 struct stat st; 388 389 if (flags & VN_TRUNCATE) 390 fd = open(file, O_RDWR|O_CREAT|O_TRUNC, 0600); 391 else 392 fd = open(file, O_RDWR); 393 if (fd >= 0 && fstat(fd, &st) == 0 && S_ISREG(st.st_mode)) { 394 if (st.st_size < vnp->size * pgsize) 395 ftruncate(fd, vnp->size * pgsize); 396 if (vnp->size != 0) 397 st.st_size = vnp->size * pgsize; 398 399 if (flags & VN_ZERO) { 400 char *buf = malloc(ZBUFSIZE); 401 bzero(buf, ZBUFSIZE); 402 while (st.st_size > 0) { 403 int n = (st.st_size > ZBUFSIZE) ? 404 ZBUFSIZE : (int)st.st_size; 405 if (write(fd, buf, n) != n) { 406 ftruncate(fd, 0); 407 printf("Unable to ZERO file %s\n", file); 408 return(0); 409 } 410 st.st_size -= (off_t)n; 411 } 412 } 413 close(fd); 414 } else { 415 printf("Unable to open file %s\n", file); 416 return(0); 417 } 418 } else if (file == NULL && vnp->size == 0 && (flags & VN_CONFIG)) { 419 warnx("specify regular filename or swap size"); 420 return (0); 421 } 422 423 rdev = rawdevice(dev); 424 f = fopen(rdev, "rw"); 425 if (f == NULL) { 426 warn("%s", dev); 427 return(1); 428 } 429 vnio.vn_file = file; 430 vnio.vn_size = vnp->size; /* non-zero only if swap backed */ 431 432 /* 433 * Disable the device 434 */ 435 if (flags & VN_DISABLE) { 436 if (flags & (VN_MOUNTRO|VN_MOUNTRW)) { 437 rv = unmount(oarg, 0); 438 if (rv) { 439 status--; 440 if (errno == EBUSY) 441 flags &= ~VN_UNCONFIG; 442 if ((flags & VN_UNCONFIG) == 0) 443 warn("umount"); 444 } else if (verbose) 445 printf("%s: unmounted\n", dev); 446 } 447 } 448 /* 449 * Clear (un-configure) the device 450 */ 451 if (flags & VN_UNCONFIG) { 452 rv = ioctl(fileno(f), VNIOCDETACH, &vnio); 453 if (rv) { 454 if (errno == ENODEV) { 455 if (verbose) 456 printf("%s: not configured\n", dev); 457 rv = 0; 458 } else { 459 status--; 460 warn("VNIOCDETACH"); 461 } 462 } else if (verbose) 463 printf("%s: cleared\n", dev); 464 } 465 /* 466 * Set specified options 467 */ 468 if (flags & VN_SET) { 469 l = setopt; 470 if (global) 471 rv = ioctl(fileno(f), VNIOCGSET, &l); 472 else 473 rv = ioctl(fileno(f), VNIOCUSET, &l); 474 if (rv) { 475 status--; 476 warn("VNIO[GU]SET"); 477 } else if (verbose) 478 printf("%s: flags now=%08lx\n",dev,l); 479 } 480 /* 481 * Reset specified options 482 */ 483 if (flags & VN_RESET) { 484 l = resetopt; 485 if (global) 486 rv = ioctl(fileno(f), VNIOCGCLEAR, &l); 487 else 488 rv = ioctl(fileno(f), VNIOCUCLEAR, &l); 489 if (rv) { 490 status--; 491 warn("VNIO[GU]CLEAR"); 492 } else if (verbose) 493 printf("%s: flags now=%08lx\n",dev,l); 494 } 495 /* 496 * Configure the device 497 */ 498 if (flags & VN_CONFIG) { 499 rv = ioctl(fileno(f), VNIOCATTACH, &vnio); 500 if (rv) { 501 status--; 502 warn("VNIOCATTACH"); 503 flags &= ~VN_ENABLE; 504 } else { 505 if (verbose) { 506 printf("%s: %s, ", dev, file); 507 if (vnp->size != 0) { 508 printf("%lld bytes mapped\n", vnio.vn_size); 509 } else { 510 printf("complete file mapped\n"); 511 } 512 } 513 /* 514 * autolabel 515 */ 516 if (vnp->autolabel) { 517 do_autolabel(vnp->dev, vnp->autolabel); 518 } 519 } 520 } 521 /* 522 * Set an option 523 */ 524 if (flags & VN_SET) { 525 l = setopt; 526 if (global) 527 rv = ioctl(fileno(f), VNIOCGSET, &l); 528 else 529 rv = ioctl(fileno(f), VNIOCUSET, &l); 530 if (rv) { 531 status--; 532 warn("VNIO[GU]SET"); 533 } else if (verbose) 534 printf("%s: flags now=%08lx\n",dev,l); 535 } 536 /* 537 * Reset an option 538 */ 539 if (flags & VN_RESET) { 540 l = resetopt; 541 if (global) 542 rv = ioctl(fileno(f), VNIOCGCLEAR, &l); 543 else 544 rv = ioctl(fileno(f), VNIOCUCLEAR, &l); 545 if (rv) { 546 status--; 547 warn("VNIO[GU]CLEAR"); 548 } else if (verbose) 549 printf("%s: flags now=%08lx\n",dev,l); 550 } 551 552 /* 553 * Close the device now, as we may want to mount it. 554 */ 555 fclose(f); 556 557 /* 558 * Enable special functions on the device 559 */ 560 if (flags & VN_ENABLE) { 561 if (flags & VN_SWAP) { 562 rv = swapon(dev); 563 if (rv) { 564 status--; 565 warn("swapon"); 566 } 567 else if (verbose) 568 printf("%s: swapping enabled\n", dev); 569 } 570 if (flags & (VN_MOUNTRO|VN_MOUNTRW)) { 571 struct ufs_args args; 572 int mflags; 573 574 args.fspec = dev; 575 mflags = (flags & VN_MOUNTRO) ? MNT_RDONLY : 0; 576 rv = mount("ufs", oarg, mflags, &args); 577 if (rv) { 578 status--; 579 warn("mount"); 580 } 581 else if (verbose) 582 printf("%s: mounted on %s\n", dev, oarg); 583 } 584 } 585 /* done: */ 586 fflush(stdout); 587 return(status < 0); 588 } 589 590 #define EOL(c) ((c) == '\0' || (c) == '\n') 591 #define WHITE(c) ((c) == ' ' || (c) == '\t' || (c) == '\n') 592 593 void 594 readconfig(int flags) 595 { 596 char buf[LINESIZE]; 597 FILE *f; 598 char *cp, *sp; 599 int ix; 600 int ax; 601 602 f = fopen(configfile, "r"); 603 if (f == NULL) 604 err(1, "%s", configfile); 605 ix = 0; /* number of elements */ 606 ax = 0; /* allocated elements */ 607 while (fgets(buf, LINESIZE, f) != NULL) { 608 cp = buf; 609 if (*cp == '#') 610 continue; 611 while (!EOL(*cp) && WHITE(*cp)) 612 cp++; 613 if (EOL(*cp)) 614 continue; 615 sp = cp; 616 while (!EOL(*cp) && !WHITE(*cp)) 617 cp++; 618 if (EOL(*cp)) 619 continue; 620 *cp++ = '\0'; 621 622 if (ix == ax) { 623 ax = ax + 16; 624 vndisks = realloc(vndisks, ax * sizeof(struct vndisk)); 625 bzero(&vndisks[ix], (ax - ix) * sizeof(struct vndisk)); 626 } 627 vndisks[ix].dev = malloc(cp - sp); 628 strcpy(vndisks[ix].dev, sp); 629 while (!EOL(*cp) && WHITE(*cp)) 630 cp++; 631 if (EOL(*cp)) 632 continue; 633 sp = cp; 634 while (!EOL(*cp) && !WHITE(*cp)) 635 cp++; 636 *cp++ = '\0'; 637 638 if (*sp == '%' && strtol(sp + 1, NULL, 0) > 0) { 639 vndisks[ix].size = getsize(sp + 1); 640 } else { 641 vndisks[ix].file = malloc(cp - sp); 642 strcpy(vndisks[ix].file, sp); 643 } 644 645 while (!EOL(*cp) && WHITE(*cp)) 646 cp++; 647 vndisks[ix].flags = flags; 648 if (!EOL(*cp)) { 649 sp = cp; 650 while (!EOL(*cp) && !WHITE(*cp)) 651 cp++; 652 *cp++ = '\0'; 653 getoptions(&vndisks[ix], sp); 654 } 655 nvndisks++; 656 ix++; 657 } 658 } 659 660 void 661 getoptions(struct vndisk *vnp, const char *fstr) 662 { 663 int flags = 0; 664 const char *oarg = NULL; 665 666 if (strcmp(fstr, "swap") == 0) 667 flags |= VN_SWAP; 668 else if (strncmp(fstr, "mount=", 6) == 0) { 669 flags |= VN_MOUNTRW; 670 oarg = &fstr[6]; 671 } else if (strncmp(fstr, "mountrw=", 8) == 0) { 672 flags |= VN_MOUNTRW; 673 oarg = &fstr[8]; 674 } else if (strncmp(fstr, "mountro=", 8) == 0) { 675 flags |= VN_MOUNTRO; 676 oarg = &fstr[8]; 677 } else if (strcmp(fstr, "ignore") == 0) 678 flags |= VN_IGNORE; 679 vnp->flags |= flags; 680 if (oarg) { 681 vnp->oarg = malloc(strlen(oarg) + 1); 682 strcpy(vnp->oarg, oarg); 683 } else 684 vnp->oarg = NULL; 685 } 686 687 char * 688 rawdevice(const char *dev) 689 { 690 char *rawbuf, *dp, *ep; 691 struct stat sb; 692 int len; 693 694 len = strlen(dev); 695 rawbuf = malloc(len + 2); 696 strcpy(rawbuf, dev); 697 if (stat(rawbuf, &sb) != 0 || !S_ISCHR(sb.st_mode)) { 698 dp = strrchr(rawbuf, '/'); 699 if (dp) { 700 for (ep = &rawbuf[len]; ep > dp; --ep) 701 *(ep+1) = *ep; 702 *++ep = 'r'; 703 } 704 } 705 return (rawbuf); 706 } 707 708 static void 709 usage(void) 710 { 711 fprintf(stderr, "%s\n%s\n%s\n%s\n", 712 "usage: vnconfig [-cdeguvTZ] [-s options] [-r options]", 713 " [-S value] special_file [regular_file] [feature]", 714 " vnconfig -a [-cdeguv] [-s options] [-r options] [-f config_file]", 715 " vnconfig -l [special_file ...]"); 716 exit(1); 717 } 718 719 static int64_t 720 getsize(const char *arg) 721 { 722 char *ptr; 723 int pgsize = getpagesize(); 724 int64_t size = strtoq(arg, &ptr, 0); 725 726 switch(tolower(*ptr)) { 727 case 't': 728 /* 729 * GULP! Terabytes. It's actually possible to create 730 * a 7.9 TB VN device, though newfs can't handle any single 731 * filesystem larger then 1 TB. 732 */ 733 size *= 1024; 734 /* fall through */ 735 case 'g': 736 size *= 1024; 737 /* fall through */ 738 default: 739 case 'm': 740 size *= 1024; 741 /* fall through */ 742 case 'k': 743 size *= 1024; 744 /* fall through */ 745 case 'c': 746 break; 747 } 748 size = (size + pgsize - 1) / pgsize; 749 return(size); 750 } 751 752 /* 753 * DO_AUTOLABEL 754 * 755 * Automatically label the device. This will wipe any preexisting 756 * label. 757 */ 758 759 static void 760 do_autolabel(const char *dev __unused, const char *label __unused) 761 { 762 /* XXX not yet implemented */ 763 fprintf(stderr, "autolabel not yet implemented, sorry\n"); 764 exit(1); 765 } 766 767