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. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#) Copyright (c) 1980, 1993 The Regents of the University of California. All rights reserved. 34 * @(#)swapon.c 8.1 (Berkeley) 6/5/93 35 * $FreeBSD: src/sbin/swapon/swapon.c,v 1.8.2.2 2001/07/30 10:30:11 dd Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/stat.h> 40 #include <sys/sysctl.h> 41 #include <sys/diskslice.h> 42 #include <sys/ioctl_compat.h> 43 #include <vm/vm_param.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fstab.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <fcntl.h> 53 #include <libutil.h> 54 55 static void usage(void); 56 static int swap_on_off(char *name, int doingall, int trim); 57 static void swaplist(int lflag, int sflag, int hflag); 58 59 enum { SWAPON, SWAPOFF, SWAPCTL } orig_prog, which_prog = SWAPCTL; 60 61 int 62 main(int argc, char **argv) 63 { 64 struct fstab *fsp; 65 char *ptr; 66 int ret; 67 int ch; 68 int doall, sflag, lflag, hflag, qflag, eflag; 69 70 if ((ptr = strrchr(argv[0], '/')) == NULL) 71 ptr = argv[0]; 72 if (strstr(ptr, "swapon")) 73 which_prog = SWAPON; 74 else if (strstr(ptr, "swapoff")) 75 which_prog = SWAPOFF; 76 orig_prog = which_prog; 77 78 sflag = lflag = hflag = qflag = doall = eflag = 0; 79 while ((ch = getopt(argc, argv, "AadeghklmqsU")) != -1) { 80 switch((char)ch) { 81 case 'A': 82 if (which_prog == SWAPCTL) { 83 doall = 1; 84 which_prog = SWAPON; 85 } else { 86 usage(); 87 } 88 break; 89 case 'a': 90 if (which_prog == SWAPON || which_prog == SWAPOFF) 91 doall = 1; 92 else 93 which_prog = SWAPON; 94 break; 95 case 'd': 96 if (which_prog == SWAPCTL) 97 which_prog = SWAPOFF; 98 else 99 usage(); 100 break; 101 case 'e': 102 eflag = 1; 103 break; 104 case 'g': 105 hflag = 'G'; 106 break; 107 case 'h': 108 hflag = 'H'; 109 break; 110 case 'k': 111 hflag = 'K'; 112 break; 113 case 'l': 114 lflag = 1; 115 break; 116 case 'm': 117 hflag = 'M'; 118 break; 119 case 'q': 120 if (which_prog == SWAPON || which_prog == SWAPOFF) 121 qflag = 1; 122 break; 123 case 's': 124 sflag = 1; 125 break; 126 case 'U': 127 if (which_prog == SWAPCTL) { 128 doall = 1; 129 which_prog = SWAPOFF; 130 } else { 131 usage(); 132 } 133 break; 134 case '?': 135 default: 136 usage(); 137 } 138 } 139 argv += optind; 140 141 ret = 0; 142 if (which_prog == SWAPON || which_prog == SWAPOFF) { 143 if (doall) { 144 while ((fsp = getfsent()) != NULL) { 145 if (strcmp(fsp->fs_type, FSTAB_SW)) 146 continue; 147 if (strstr(fsp->fs_mntops, "noauto")) 148 continue; 149 if (swap_on_off(fsp->fs_spec, 1, eflag)) { 150 ret = 1; 151 } else { 152 if (!qflag) { 153 printf("%s: %sing %s as swap device\n", 154 getprogname(), 155 which_prog == SWAPOFF ? "remov" : "add", 156 fsp->fs_spec); 157 } 158 } 159 } 160 } else if (*argv == NULL) { 161 usage(); 162 } 163 for (; *argv; ++argv) { 164 if (swap_on_off(getdevpath(*argv, 0), 0, eflag)) { 165 ret = 1; 166 } else if (orig_prog == SWAPCTL) { 167 printf("%s: %sing %s as swap device\n", 168 getprogname(), 169 which_prog == SWAPOFF ? "remov" : "add", 170 *argv); 171 } 172 } 173 } else { 174 if (lflag || sflag) 175 swaplist(lflag, sflag, hflag); 176 else 177 usage(); 178 } 179 exit(ret); 180 } 181 182 /* 183 * TRIM the device 184 */ 185 static 186 void 187 trim_volume(char * name) 188 { 189 struct partinfo pinfo; 190 int fd,i,n; 191 size_t bytes = 0,ksize; 192 char *xswbuf; 193 struct xswdev *xsw; 194 195 196 /* 197 * Determine if this device is already being used by swap without 198 * calling swapon(). 199 */ 200 if ((sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) || 201 bytes == 0) { 202 err(1, "sysctlbyname()"); 203 } 204 205 xswbuf = malloc(bytes); 206 if ((sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) || 207 bytes == 0) { 208 free(xswbuf); 209 err(1, "sysctlbyname()"); 210 } 211 212 ksize = ((struct xswdev *)xswbuf)->xsw_size; 213 n = (int)(bytes / ksize); 214 for (i = 0; i < n; ++i) { 215 xsw = (void *)((char *)xswbuf + i * ksize); 216 217 if (xsw->xsw_dev == NODEV ) 218 continue; 219 if(!strcmp(devname(xsw->xsw_dev, S_IFCHR), 220 name + strlen("/dev/"))) { 221 warnx("%s: device already a swap device", name); 222 exit(1); 223 } 224 } 225 226 /* 227 * Get the size and offset of this parititon/device 228 */ 229 fd = open(name, O_RDWR); 230 if (fd < 0) 231 err(1, "Unable to open %s R+W", name); 232 if (ioctl(fd, DIOCGPART, &pinfo) < 0) { 233 printf("Cannot trim regular file\n"); 234 usage (); 235 } 236 off_t ioarg[2]; 237 238 /*Trim the Device*/ 239 ioarg[0] = pinfo.media_offset; 240 ioarg[1] = pinfo.media_size; 241 printf("Trimming Device:%s, sectors (%llu -%llu)\n",name, 242 (unsigned long long)ioarg[0]/512, 243 (unsigned long long)ioarg[1]/512); 244 if (ioctl(fd, IOCTLTRIM, ioarg) < 0) { 245 printf("Device trim failed\n"); 246 usage (); 247 } 248 close(fd); 249 } 250 251 static int 252 swap_on_off(char *name, int doingall, int trim) 253 { 254 if (which_prog == SWAPON && trim){ 255 char sysctl_name[64]; 256 int trim_enabled = 0; 257 size_t olen = sizeof(trim_enabled); 258 char *dev_name = strdup(name); 259 dev_name = strtok(dev_name + strlen("/dev/da"),"s"); 260 sprintf(sysctl_name, "kern.cam.da.%s.trim_enabled", dev_name); 261 sysctlbyname(sysctl_name, &trim_enabled, &olen, NULL, 0); 262 if(errno == ENOENT) { 263 printf("Device:%s does not support the TRIM command\n", 264 name); 265 usage(); 266 } 267 if(!trim_enabled) { 268 printf("Erase device option selected, but sysctl (%s) " 269 "is not enabled\n",sysctl_name); 270 usage(); 271 } 272 273 trim_volume(name); 274 275 } 276 if ((which_prog == SWAPOFF ? swapoff(name) : swapon(name)) == -1) { 277 switch(errno) { 278 case EBUSY: 279 if (!doingall) 280 warnx("%s: device already in use", name); 281 break; 282 case EINVAL: 283 if (which_prog == SWAPON) 284 warnx("%s: NSWAPDEV limit reached", name); 285 else if (!doingall) 286 warn("%s", name); 287 break; 288 default: 289 warn("%s", name); 290 break; 291 } 292 return(1); 293 } 294 return(0); 295 } 296 297 static void 298 usage(void) 299 { 300 fprintf(stderr, "usage: %s ", getprogname()); 301 switch (orig_prog) { 302 case SWAPON: 303 case SWAPOFF: 304 fprintf(stderr, "-aeq | file ...\n"); 305 break; 306 case SWAPCTL: 307 fprintf(stderr, "[-AeghklmsU] [-a file ... | -d file ...]\n"); 308 break; 309 } 310 exit(1); 311 } 312 313 static void 314 sizetobuf(char *buf, size_t bufsize, int hflag, long long val, int hlen, 315 long blocksize) 316 { 317 if (hflag == 'H') { 318 char tmp[16]; 319 320 humanize_number(tmp, 5, (int64_t)val, "", HN_AUTOSCALE, 321 HN_B | HN_NOSPACE | HN_DECIMAL); 322 snprintf(buf, bufsize, "%*s", hlen, tmp); 323 } else { 324 snprintf(buf, bufsize, "%*lld", hlen, val / blocksize); 325 } 326 } 327 328 static void 329 swaplist(int lflag, int sflag, int hflag) 330 { 331 size_t ksize, bytes = 0; 332 char *xswbuf; 333 struct xswdev *xsw; 334 int hlen, pagesize; 335 int i, n; 336 long blocksize; 337 long long total, used, tmp_total, tmp_used; 338 char buf[32]; 339 340 pagesize = getpagesize(); 341 switch(hflag) { 342 case 'G': 343 blocksize = 1024 * 1024 * 1024; 344 strlcpy(buf, "1GB-blocks", sizeof(buf)); 345 hlen = 10; 346 break; 347 case 'H': 348 blocksize = -1; 349 strlcpy(buf, "Bytes", sizeof(buf)); 350 hlen = 10; 351 break; 352 case 'K': 353 blocksize = 1024; 354 strlcpy(buf, "1kB-blocks", sizeof(buf)); 355 hlen = 10; 356 break; 357 case 'M': 358 blocksize = 1024 * 1024; 359 strlcpy(buf, "1MB-blocks", sizeof(buf)); 360 hlen = 10; 361 break; 362 default: 363 getbsize(&hlen, &blocksize); 364 snprintf(buf, sizeof(buf), "%ld-blocks", blocksize); 365 break; 366 } 367 368 if (sysctlbyname("vm.swap_info_array", NULL, &bytes, NULL, 0) < 0) 369 err(1, "sysctlbyname()"); 370 if (bytes == 0) 371 err(1, "sysctlbyname()"); 372 373 xswbuf = malloc(bytes); 374 if (sysctlbyname("vm.swap_info_array", xswbuf, &bytes, NULL, 0) < 0) { 375 free(xswbuf); 376 err(1, "sysctlbyname()"); 377 } 378 if (bytes == 0) { 379 free(xswbuf); 380 err(1, "sysctlbyname()"); 381 } 382 383 /* 384 * Calculate size of xsw entry returned by kernel (it can be larger 385 * than the one we have if there is a version mismatch). 386 */ 387 ksize = ((struct xswdev *)xswbuf)->xsw_size; 388 n = (int)(bytes / ksize); 389 390 if (lflag) { 391 printf("%-13s %*s %*s\n", 392 "Device:", 393 hlen, buf, 394 hlen, "Used:"); 395 } 396 397 total = used = tmp_total = tmp_used = 0; 398 for (i = 0; i < n; ++i) { 399 xsw = (void *)((char *)xswbuf + i * ksize); 400 401 if (xsw->xsw_nblks == 0) 402 continue; 403 404 tmp_total = (long long)xsw->xsw_nblks * pagesize; 405 tmp_used = (long long)xsw->xsw_used * pagesize; 406 total += tmp_total; 407 used += tmp_used; 408 if (lflag) { 409 sizetobuf(buf, sizeof(buf), hflag, tmp_total, hlen, 410 blocksize); 411 if (xsw->xsw_dev == NODEV) { 412 printf("%-13s %s ", "[NFS swap]", buf); 413 } else { 414 printf("/dev/%-8s %s ", 415 devname(xsw->xsw_dev, S_IFCHR), buf); 416 } 417 418 sizetobuf(buf, sizeof(buf), hflag, tmp_used, hlen, 419 blocksize); 420 printf("%s\n", buf); 421 } 422 } 423 424 if (sflag) { 425 sizetobuf(buf, sizeof(buf), hflag, total, hlen, blocksize); 426 printf("Total: %s ", buf); 427 sizetobuf(buf, sizeof(buf), hflag, used, hlen, blocksize); 428 printf("%s\n", buf); 429 } 430 } 431