| 1 | /* |
| 2 | * Copyright (c) 1980, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software |
| 15 | * without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | * |
| 29 | * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. |
| 30 | * @(#)swapon.c 8.1 (Berkeley) 6/5/93 |
| 31 | * $FreeBSD: src/sbin/swapon/swapon.c,v 1.8.2.2 2001/07/30 10:30:11 dd Exp $ |
| 32 | */ |
| 33 | |
| 34 | #include <sys/param.h> |
| 35 | #include <sys/stat.h> |
| 36 | #include <sys/sysctl.h> |
| 37 | #include <sys/linker.h> |
| 38 | #include <sys/diskslice.h> |
| 39 | #include <vm/vm_param.h> |
| 40 | |
| 41 | #include <err.h> |
| 42 | #include <errno.h> |
| 43 | #include <fstab.h> |
| 44 | #include <stdio.h> |
| 45 | #include <stdlib.h> |
| 46 | #include <string.h> |
| 47 | #include <unistd.h> |
| 48 | #include <fcntl.h> |
| 49 | #include <libutil.h> |
| 50 | |
| 51 | #include <bus/cam/scsi/scsi_daio.h> |
| 52 | |
| 53 | static void usage(void); |
| 54 | static int swap_on_off(char *name, int doingall, int trim, int ask); |
| 55 | static char *docrypt(char *fs_spec, int pass); |
| 56 | static void swaplist(int lflag, int sflag, int hflag); |
| 57 | |
| 58 | static int qflag; |
| 59 | |
| 60 | enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; |
| 61 | |
| 62 | int |
| 63 | main(int argc, char **argv) |
| 64 | { |
| 65 | struct fstab *fsp; |
| 66 | char *ptr; |
| 67 | int ret; |
| 68 | int ch; |
| 69 | int doall, sflag, lflag, hflag, eflag, cflag, iflag; |
| 70 | |
| 71 | if ((ptr = strrchr(argv[0], '/')) == NULL) |
| 72 | ptr = argv[0]; |
| 73 | if (strstr(ptr, "swapon")) |
| 74 | which_prog = SWAPON; |
| 75 | else if (strstr(ptr, "swapoff")) |
| 76 | which_prog = SWAPOFF; |
| 77 | orig_prog = which_prog; |
| 78 | |
| 79 | sflag = lflag = hflag = doall = eflag = cflag = iflag = 0; |
| 80 | while ((ch = getopt(argc, argv, "AacdeghiklmqsU")) != -1) { |
| 81 | switch((char)ch) { |
| 82 | case 'A': |
| 83 | if (which_prog == SWAPCTL) { |
| 84 | doall = 1; |
| 85 | which_prog = SWAPON; |
| 86 | } else { |
| 87 | usage(); |
| 88 | } |
| 89 | break; |
| 90 | case 'a': |
| 91 | if (which_prog == SWAPON || which_prog == SWAPOFF) |
| 92 | doall = 1; |
| 93 | else |
| 94 | which_prog = SWAPON; |
| 95 | break; |
| 96 | case 'd': |
| 97 | if (which_prog == SWAPCTL) |
| 98 | which_prog = SWAPOFF; |
| 99 | else |
| 100 | usage(); |
| 101 | break; |
| 102 | case 'c': |
| 103 | cflag = 1; |
| 104 | break; |
| 105 | case 'e': |
| 106 | eflag = 1; |
| 107 | break; |
| 108 | case 'g': |
| 109 | hflag = 'G'; |
| 110 | break; |
| 111 | case 'h': |
| 112 | hflag = 'H'; |
| 113 | break; |
| 114 | case 'i': |
| 115 | iflag = 1; |
| 116 | break; |
| 117 | case 'k': |
| 118 | hflag = 'K'; |
| 119 | break; |
| 120 | case 'l': |
| 121 | lflag = 1; |
| 122 | break; |
| 123 | case 'm': |
| 124 | hflag = 'M'; |
| 125 | break; |
| 126 | case 'q': |
| 127 | if (which_prog == SWAPON || which_prog == SWAPOFF) |
| 128 | qflag = 1; |
| 129 | break; |
| 130 | case 's': |
| 131 | sflag = 1; |
| 132 | break; |
| 133 | case 'U': |
| 134 | if (which_prog == SWAPCTL) { |
| 135 | doall = 1; |
| 136 | which_prog = SWAPOFF; |
| 137 | } else { |
| 138 | usage(); |
| 139 | } |
| 140 | break; |
| 141 | case '?': |
| 142 | default: |
| 143 | usage(); |
| 144 | } |
| 145 | } |
| 146 | argv += optind; |
| 147 | |
| 148 | ret = 0; |
| 149 | if (which_prog == SWAPON || which_prog == SWAPOFF) { |
| 150 | if (doall) { |
| 151 | while ((fsp = getfsent()) != NULL) { |
| 152 | char *fs_spec; |
| 153 | int dotrim = eflag; |
| 154 | |
| 155 | if (strcmp(fsp->fs_type, FSTAB_SW)) |
| 156 | continue; |
| 157 | if (strstr(fsp->fs_mntops, "noauto")) |
| 158 | continue; |
| 159 | |
| 160 | if (strstr(fsp->fs_mntops, "notrim")) |
| 161 | dotrim = 0; |
| 162 | else if (strstr(fsp->fs_mntops, "trim")) |
| 163 | dotrim = 1; |
| 164 | |
| 165 | if (cflag || strstr(fsp->fs_mntops, "crypt")) |
| 166 | fs_spec = docrypt(fsp->fs_spec, 1); |
| 167 | else |
| 168 | fs_spec = strdup(fsp->fs_spec); |
| 169 | if (swap_on_off(fs_spec, 1, dotrim, iflag)) { |
| 170 | ret = 1; |
| 171 | } else { |
| 172 | if (cflag || |
| 173 | strstr(fsp->fs_mntops, "crypt")) { |
| 174 | docrypt(fsp->fs_spec, 2); |
| 175 | } |
| 176 | if (!qflag) { |
| 177 | printf("%s: %sing %s as swap " |
| 178 | "device\n", |
| 179 | getprogname(), |
| 180 | (which_prog == SWAPOFF ? |
| 181 | "remov" : "add"), |
| 182 | fs_spec); |
| 183 | } |
| 184 | } |
| 185 | free(fs_spec); |
| 186 | } |
| 187 | } else if (*argv == NULL) { |
| 188 | usage(); |
| 189 | } |
| 190 | for (; *argv; ++argv) { |
| 191 | char *ospec = getdevpath(*argv, 0); |
| 192 | char *fs_spec; |
| 193 | if (cflag) |
| 194 | fs_spec = docrypt(ospec, 1); |
| 195 | else |
| 196 | fs_spec = strdup(ospec); |
| 197 | if (swap_on_off(fs_spec, 0, eflag, iflag)) { |
| 198 | ret = 1; |
| 199 | } else { |
| 200 | if (cflag) |
| 201 | docrypt(ospec, 2); |
| 202 | if (!qflag) { |
| 203 | printf("%s: %sing %s as swap device\n", |
| 204 | getprogname(), |
| 205 | (which_prog == SWAPOFF ? |
| 206 | "remov" : "add"), |
| 207 | fs_spec); |
| 208 | } |
| 209 | } |
| 210 | free(fs_spec); |
| 211 | } |
| 212 | } else { |
| 213 | if (lflag || sflag) |
| 214 | swaplist(lflag, sflag, hflag); |
| 215 | else |
| 216 | usage(); |
| 217 | } |
| 218 | exit(ret); |
| 219 | } |
| 220 | |
| 221 | static |
| 222 | char * |
| 223 | docrypt(char *fs_spec, int pass) |
| 224 | { |
| 225 | char *id; |
| 226 | char *res; |
| 227 | char *buf; |
| 228 | |
| 229 | if ((id = strrchr(fs_spec, '/')) == NULL) |
| 230 | id = fs_spec; |
| 231 | else |
| 232 | ++id; |
| 233 | asprintf(&id, "swap-%s", id); |
| 234 | asprintf(&res, "/dev/mapper/%s", id); |
| 235 | |
| 236 | switch(which_prog) { |
| 237 | case SWAPOFF: |
| 238 | if (pass != 2) |
| 239 | break; |
| 240 | asprintf(&buf, "/sbin/cryptsetup remove %s", id); |
| 241 | system(buf); |
| 242 | free(buf); |
| 243 | free(id); |
| 244 | break; |
| 245 | case SWAPON: |
| 246 | if (pass != 1) |
| 247 | break; |
| 248 | if (kldfind("dm_target_crypt") < 0) |
| 249 | kldload("dm_target_crypt"); |
| 250 | |
| 251 | asprintf(&buf, |
| 252 | "/sbin/cryptsetup --key-file /dev/urandom " |
| 253 | "--key-size 256 create %s %s", |
| 254 | id, fs_spec); |
| 255 | if (qflag == 0) |
| 256 | printf("%s\n", buf); |
| 257 | system(buf); |
| 258 | free(buf); |
| 259 | free(id); |
| 260 | |
| 261 | /* |
| 262 | * NOTE: Don't revert to /dev/da* on error because this could |
| 263 | * inadvertently add both /dev/da* and |
| 264 | * /dev/mapper/swap-da*. |
| 265 | * |
| 266 | * Allow the swapon operation to report failure or |
| 267 | * report a duplicate. |
| 268 | */ |
| 269 | break; |
| 270 | default: |
| 271 | free(res); |
| 272 | free(id); |
| 273 | res = strdup(fs_spec); |
| 274 | break; |
| 275 | } |
| 276 | |
| 277 | if (pass == 2) { |
| 278 | free (res); |
| 279 | res = NULL; |
| 280 | } |
| 281 | return res; |
| 282 | } |
| 283 | |
| 284 | /* |
| 285 | * TRIM the device |
| 286 | */ |
| 287 | static |
| 288 | void |
| 289 | trim_volume(char * name) |
| 290 | { |
| 291 | struct partinfo pinfo; |
| 292 | int fd,i,n; |
| 293 | size_t bytes = 0,ksize; |
| 294 | char *xswbuf; |
| 295 | struct xswdev *xsw; |
| 296 | |
| 297 | |
| 298 | /* |
| 299 | * Determine if this device is already being used by swap without |
| 300 | * calling swapon(). |
| 301 | */ |
| 302 | if ((sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) || |
| 303 | bytes == 0) { |
| 304 | err(1, "sysctlbyname()"); |
| 305 | } |
| 306 | |
| 307 | xswbuf = malloc(bytes); |
| 308 | if ((sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) || |
| 309 | bytes == 0) { |
| 310 | free(xswbuf); |
| 311 | err(1, "sysctlbyname()"); |
| 312 | } |
| 313 | |
| 314 | ksize = ((struct xswdev *)xswbuf)->xsw_size; |
| 315 | n = (int)(bytes / ksize); |
| 316 | for (i = 0; i < n; ++i) { |
| 317 | xsw = (void *)((char *)xswbuf + i * ksize); |
| 318 | |
| 319 | if (xsw->xsw_dev == NODEV ) |
| 320 | continue; |
| 321 | if(!strcmp(devname(xsw->xsw_dev, S_IFCHR), |
| 322 | name + strlen("/dev/"))) { |
| 323 | warnx("%s: device already a swap device", name); |
| 324 | exit(1); |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * Get the size and offset of this parititon/device |
| 330 | */ |
| 331 | fd = open(name, O_RDWR); |
| 332 | if (fd < 0) |
| 333 | err(1, "Unable to open %s R+W", name); |
| 334 | if (ioctl(fd, DIOCGPART, &pinfo) < 0) { |
| 335 | printf("Cannot trim regular file\n"); |
| 336 | usage (); |
| 337 | } |
| 338 | off_t ioarg[2]; |
| 339 | |
| 340 | /*Trim the Device*/ |
| 341 | ioarg[0] = pinfo.media_offset; |
| 342 | ioarg[1] = pinfo.media_size; |
| 343 | printf("Trimming Device:%s, sectors (%llu -%llu)\n",name, |
| 344 | (unsigned long long)ioarg[0]/512, |
| 345 | (unsigned long long)ioarg[1]/512); |
| 346 | if (ioctl(fd, DAIOCTRIM, ioarg) < 0) { |
| 347 | printf("Device trim failed\n"); |
| 348 | usage (); |
| 349 | } |
| 350 | close(fd); |
| 351 | } |
| 352 | |
| 353 | static int |
| 354 | swap_on_off(char *name, int doingall, int trim, int ask) |
| 355 | { |
| 356 | |
| 357 | if (ask && which_prog == SWAPON) { |
| 358 | printf("Do you really want to use device %s as a swap device ?\n", name); |
| 359 | printf("You might loose data. [Y/N]"); |
| 360 | |
| 361 | int c = fgetc(stdin); |
| 362 | printf("\n"); |
| 363 | if (c != 'y' && c != 'Y') |
| 364 | return(1); |
| 365 | |
| 366 | } |
| 367 | if (which_prog == SWAPON && trim) { |
| 368 | char sysctl_name[64]; |
| 369 | int trim_enabled = 0; |
| 370 | size_t olen = sizeof(trim_enabled); |
| 371 | char *dev_name = strdup(name); |
| 372 | dev_name = strtok(dev_name + strlen("/dev/da"),"s"); |
| 373 | sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name); |
| 374 | if (sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0) < 0) { |
| 375 | if (qflag == 0) { |
| 376 | printf("TRIM not supported on %s, " |
| 377 | "ignoring\n", |
| 378 | name); |
| 379 | } |
| 380 | errno = 0; |
| 381 | } else if (!trim_enabled) { |
| 382 | if (qflag == 0) { |
| 383 | printf("TRIM not enabled on %s (%s), " |
| 384 | "ignoring\n", |
| 385 | name, sysctl_name); |
| 386 | } |
| 387 | } else { |
| 388 | trim_volume(name); |
| 389 | } |
| 390 | } |
| 391 | if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) { |
| 392 | switch(errno) { |
| 393 | case EBUSY: |
| 394 | if (!doingall) |
| 395 | warnx("%s: device already in use", name); |
| 396 | break; |
| 397 | case EINVAL: |
| 398 | if (which_prog == SWAPON) |
| 399 | warnx("%s: NSWAPDEV limit reached", name); |
| 400 | else if (!doingall) |
| 401 | warn("%s", name); |
| 402 | break; |
| 403 | default: |
| 404 | warn("%s", name); |
| 405 | break; |
| 406 | } |
| 407 | return(1); |
| 408 | } |
| 409 | return(0); |
| 410 | } |
| 411 | |
| 412 | static void |
| 413 | usage(void) |
| 414 | { |
| 415 | fprintf(stderr, "usage: %s ", getprogname()); |
| 416 | switch (orig_prog) { |
| 417 | case SWAPON: |
| 418 | case SWAPOFF: |
| 419 | fprintf(stderr, "-aeiq | file ...\n"); |
| 420 | break; |
| 421 | case SWAPCTL: |
| 422 | fprintf(stderr, "[-AeghiklmsU] [-a file ... | -d file ...]\n"); |
| 423 | break; |
| 424 | } |
| 425 | exit(1); |
| 426 | } |
| 427 | |
| 428 | static void |
| 429 | sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, |
| 430 | long blocksize) |
| 431 | { |
| 432 | if (hflag == 'H') { |
| 433 | char tmp[16]; |
| 434 | |
| 435 | humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, |
| 436 | HN_B | HN_NOSPACE | HN_DECIMAL); |
| 437 | snprintf(buf, bufsize, "%*s", hlen, tmp); |
| 438 | } else { |
| 439 | snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | swaplist(int lflag, int sflag, int hflag) |
| 445 | { |
| 446 | size_t ksize, bytes = 0; |
| 447 | char *xswbuf; |
| 448 | struct xswdev *xsw; |
| 449 | int hlen, pagesize; |
| 450 | int i, n; |
| 451 | long blocksize; |
| 452 | long long total, used, tmp_total, tmp_used; |
| 453 | char buf[32]; |
| 454 | |
| 455 | pagesize = getpagesize(); |
| 456 | switch(hflag) { |
| 457 | case 'G': |
| 458 | blocksize = 1024 * 1024 * 1024; |
| 459 | strlcpy(buf, "1GB-blocks", sizeof(buf)); |
| 460 | hlen = 10; |
| 461 | break; |
| 462 | case 'H': |
| 463 | blocksize = -1; |
| 464 | strlcpy(buf, "Bytes", sizeof(buf)); |
| 465 | hlen = 10; |
| 466 | break; |
| 467 | case 'K': |
| 468 | blocksize = 1024; |
| 469 | strlcpy(buf, "1kB-blocks", sizeof(buf)); |
| 470 | hlen = 10; |
| 471 | break; |
| 472 | case 'M': |
| 473 | blocksize = 1024 * 1024; |
| 474 | strlcpy(buf, "1MB-blocks", sizeof(buf)); |
| 475 | hlen = 10; |
| 476 | break; |
| 477 | default: |
| 478 | getbsize(&hlen, &blocksize); |
| 479 | snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); |
| 480 | break; |
| 481 | } |
| 482 | |
| 483 | if (sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) |
| 484 | err(1, "sysctlbyname()"); |
| 485 | if (bytes == 0) |
| 486 | err(1, "sysctlbyname()"); |
| 487 | |
| 488 | xswbuf = malloc(bytes); |
| 489 | if (sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) { |
| 490 | free(xswbuf); |
| 491 | err(1, "sysctlbyname()"); |
| 492 | } |
| 493 | if (bytes == 0) { |
| 494 | free(xswbuf); |
| 495 | err(1, "sysctlbyname()"); |
| 496 | } |
| 497 | |
| 498 | /* |
| 499 | * Calculate size of xsw entry returned by kernel (it can be larger |
| 500 | * than the one we have if there is a version mismatch). |
| 501 | */ |
| 502 | ksize = ((struct xswdev *)xswbuf)->xsw_size; |
| 503 | n = (int)(bytes / ksize); |
| 504 | |
| 505 | if (lflag) { |
| 506 | printf("%-13s %*s %*s\n", |
| 507 | "Device:", |
| 508 | hlen, buf, |
| 509 | hlen, "Used:"); |
| 510 | } |
| 511 | |
| 512 | total = used = tmp_total = tmp_used = 0; |
| 513 | for (i = 0; i < n; ++i) { |
| 514 | xsw = (void *)((char *)xswbuf + i * ksize); |
| 515 | |
| 516 | if (xsw->xsw_nblks == 0) |
| 517 | continue; |
| 518 | |
| 519 | tmp_total = (long long)xsw->xsw_nblks * pagesize; |
| 520 | tmp_used = (long long)xsw->xsw_used * pagesize; |
| 521 | total += tmp_total; |
| 522 | used += tmp_used; |
| 523 | if (lflag) { |
| 524 | sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, |
| 525 | blocksize); |
| 526 | if (xsw->xsw_dev == NODEV) { |
| 527 | printf("%-13s %s ", "[NFS swap]", buf); |
| 528 | } else { |
| 529 | printf("/dev/%-8s %s ", |
| 530 | devname(xsw->xsw_dev, S_IFCHR), buf); |
| 531 | } |
| 532 | |
| 533 | sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, |
| 534 | blocksize); |
| 535 | printf("%s\n", buf); |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | if (sflag) { |
| 540 | sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); |
| 541 | printf("Total: %s ", buf); |
| 542 | sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); |
| 543 | printf("%s\n", buf); |
| 544 | } |
| 545 | } |