1 /* 2 * ---------------------------------------------------------------------------- 3 * "THE BEER-WARE LICENSE" (Revision 42): 4 * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you 5 * can do whatever you want with this stuff. If we meet some day, and you think 6 * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp 7 * ---------------------------------------------------------------------------- 8 * 9 * $FreeBSD$ 10 * 11 */ 12 #include <sys/param.h> 13 #include <sys/devicestat.h> 14 #include <sys/ioctl.h> 15 #include <sys/linker.h> 16 #include <sys/mdioctl.h> 17 #include <sys/module.h> 18 #include <sys/resource.h> 19 #include <sys/stat.h> 20 21 #include <assert.h> 22 #include <devstat.h> 23 #include <err.h> 24 #include <errno.h> 25 #include <fcntl.h> 26 #include <inttypes.h> 27 #include <libgeom.h> 28 #include <libutil.h> 29 #include <stdarg.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <unistd.h> 34 35 36 static struct md_ioctl mdio; 37 static enum {UNSET, ATTACH, DETACH, LIST} action = UNSET; 38 static int nflag; 39 40 static void usage(void); 41 static int md_find(char *, const char *); 42 static int md_query(char *name); 43 static int md_list(char *units, int opt); 44 static char *geom_config_get(struct gconf *g, char *name); 45 static void md_prthumanval(char *length); 46 47 #define OPT_VERBOSE 0x01 48 #define OPT_UNIT 0x02 49 #define OPT_DONE 0x04 50 #define OPT_LIST 0x10 51 52 #define CLASS_NAME_MD "MD" 53 54 static void 55 usage() 56 { 57 fprintf(stderr, 58 "usage: mdconfig -a -t type [-n] [-o [no]option] ... [-f file]\n" 59 " [-s size] [-S sectorsize] [-u unit]\n" 60 " [-x sectors/track] [-y heads/cyl]\n" 61 " mdconfig -d -u unit\n" 62 " mdconfig -l [-v] [-n] [-u unit]\n"); 63 fprintf(stderr, "\t\ttype = {malloc, preload, vnode, swap}\n"); 64 fprintf(stderr, "\t\toption = {cluster, compress, reserve}\n"); 65 fprintf(stderr, "\t\tsize = %%d (512 byte blocks), %%db (B),\n"); 66 fprintf(stderr, "\t\t %%dk (kB), %%dm (MB), %%dg (GB) or\n"); 67 fprintf(stderr, "\t\t %%dt (TB)\n"); 68 exit(1); 69 } 70 71 int 72 main(int argc, char **argv) 73 { 74 int ch, fd, i, vflag; 75 char *p; 76 int cmdline = 0; 77 char *mdunit; 78 79 bzero(&mdio, sizeof(mdio)); 80 mdio.md_file = malloc(PATH_MAX); 81 if (mdio.md_file == NULL) 82 err(1, "could not allocate memory"); 83 vflag = 0; 84 bzero(mdio.md_file, PATH_MAX); 85 for (;;) { 86 ch = getopt(argc, argv, "ab:df:lno:s:S:t:u:vx:y:"); 87 if (ch == -1) 88 break; 89 switch (ch) { 90 case 'a': 91 if (cmdline != 0) 92 usage(); 93 action = ATTACH; 94 cmdline = 1; 95 break; 96 case 'd': 97 if (cmdline != 0) 98 usage(); 99 action = DETACH; 100 mdio.md_options = MD_AUTOUNIT; 101 cmdline = 3; 102 break; 103 case 'l': 104 if (cmdline != 0) 105 usage(); 106 action = LIST; 107 mdio.md_options = MD_AUTOUNIT; 108 cmdline = 3; 109 break; 110 case 'n': 111 nflag = 1; 112 break; 113 case 't': 114 if (cmdline != 1) 115 usage(); 116 if (!strcmp(optarg, "malloc")) { 117 mdio.md_type = MD_MALLOC; 118 mdio.md_options = MD_AUTOUNIT | MD_COMPRESS; 119 } else if (!strcmp(optarg, "preload")) { 120 mdio.md_type = MD_PRELOAD; 121 mdio.md_options = 0; 122 } else if (!strcmp(optarg, "vnode")) { 123 mdio.md_type = MD_VNODE; 124 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 125 } else if (!strcmp(optarg, "swap")) { 126 mdio.md_type = MD_SWAP; 127 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 128 } else { 129 usage(); 130 } 131 cmdline=2; 132 break; 133 case 'f': 134 if (cmdline == 0) { 135 action = ATTACH; 136 cmdline = 1; 137 } 138 if (cmdline == 1) { 139 /* Imply ``-t vnode'' */ 140 mdio.md_type = MD_VNODE; 141 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 142 cmdline = 2; 143 } 144 if (cmdline != 2) 145 usage(); 146 if (realpath(optarg, mdio.md_file) == NULL) { 147 err(1, "could not find full path for %s", 148 optarg); 149 } 150 fd = open(mdio.md_file, O_RDONLY); 151 if (fd < 0) 152 err(1, "could not open %s", optarg); 153 else if (mdio.md_mediasize == 0) { 154 struct stat sb; 155 156 if (fstat(fd, &sb) == -1) 157 err(1, "could not stat %s", optarg); 158 mdio.md_mediasize = sb.st_size; 159 } 160 close(fd); 161 break; 162 case 'o': 163 if (cmdline != 2) 164 usage(); 165 if (!strcmp(optarg, "async")) 166 mdio.md_options |= MD_ASYNC; 167 else if (!strcmp(optarg, "noasync")) 168 mdio.md_options &= ~MD_ASYNC; 169 else if (!strcmp(optarg, "cluster")) 170 mdio.md_options |= MD_CLUSTER; 171 else if (!strcmp(optarg, "nocluster")) 172 mdio.md_options &= ~MD_CLUSTER; 173 else if (!strcmp(optarg, "compress")) 174 mdio.md_options |= MD_COMPRESS; 175 else if (!strcmp(optarg, "nocompress")) 176 mdio.md_options &= ~MD_COMPRESS; 177 else if (!strcmp(optarg, "force")) 178 mdio.md_options |= MD_FORCE; 179 else if (!strcmp(optarg, "noforce")) 180 mdio.md_options &= ~MD_FORCE; 181 else if (!strcmp(optarg, "readonly")) 182 mdio.md_options |= MD_READONLY; 183 else if (!strcmp(optarg, "noreadonly")) 184 mdio.md_options &= ~MD_READONLY; 185 else if (!strcmp(optarg, "reserve")) 186 mdio.md_options |= MD_RESERVE; 187 else if (!strcmp(optarg, "noreserve")) 188 mdio.md_options &= ~MD_RESERVE; 189 else 190 errx(1, "Unknown option: %s.", optarg); 191 break; 192 case 'S': 193 if (cmdline != 2) 194 usage(); 195 mdio.md_sectorsize = strtoul(optarg, &p, 0); 196 break; 197 case 's': 198 if (cmdline == 0) { 199 /* Imply ``-a'' */ 200 action = ATTACH; 201 cmdline = 1; 202 } 203 if (cmdline == 1) { 204 /* Imply ``-t swap'' */ 205 mdio.md_type = MD_SWAP; 206 mdio.md_options = MD_CLUSTER | MD_AUTOUNIT | MD_COMPRESS; 207 cmdline = 2; 208 } 209 if (cmdline != 2) 210 usage(); 211 mdio.md_mediasize = (off_t)strtoumax(optarg, &p, 0); 212 if (p == NULL || *p == '\0') 213 mdio.md_mediasize *= DEV_BSIZE; 214 else if (*p == 'b' || *p == 'B') 215 ; /* do nothing */ 216 else if (*p == 'k' || *p == 'K') 217 mdio.md_mediasize <<= 10; 218 else if (*p == 'm' || *p == 'M') 219 mdio.md_mediasize <<= 20; 220 else if (*p == 'g' || *p == 'G') 221 mdio.md_mediasize <<= 30; 222 else if (*p == 't' || *p == 'T') { 223 mdio.md_mediasize <<= 30; 224 mdio.md_mediasize <<= 10; 225 } else 226 errx(1, "Unknown suffix on -s argument"); 227 break; 228 case 'u': 229 if (cmdline != 2 && cmdline != 3) 230 usage(); 231 if (!strncmp(optarg, "/dev/", 5)) 232 optarg += 5; 233 if (!strncmp(optarg, MD_NAME, sizeof(MD_NAME) - 1)) 234 optarg += sizeof(MD_NAME) - 1; 235 mdio.md_unit = strtoul(optarg, &p, 0); 236 if (mdio.md_unit == (unsigned)ULONG_MAX || *p != '\0') 237 errx(1, "bad unit: %s", optarg); 238 mdunit = optarg; 239 mdio.md_options &= ~MD_AUTOUNIT; 240 break; 241 case 'v': 242 if (cmdline != 3) 243 usage(); 244 vflag = OPT_VERBOSE; 245 break; 246 case 'x': 247 if (cmdline != 2) 248 usage(); 249 mdio.md_fwsectors = strtoul(optarg, &p, 0); 250 break; 251 case 'y': 252 if (cmdline != 2) 253 usage(); 254 mdio.md_fwheads = strtoul(optarg, &p, 0); 255 break; 256 default: 257 usage(); 258 } 259 } 260 mdio.md_version = MDIOVERSION; 261 262 if (!kld_isloaded("g_md") && kld_load("geom_md") == -1) 263 err(1, "failed to load geom_md module"); 264 265 fd = open("/dev/" MDCTL_NAME, O_RDWR, 0); 266 if (fd < 0) 267 err(1, "open(/dev/%s)", MDCTL_NAME); 268 if (cmdline == 2 269 && (mdio.md_type == MD_MALLOC || mdio.md_type == MD_SWAP)) 270 if (mdio.md_mediasize == 0) 271 errx(1, "must specify -s for -t malloc or -t swap"); 272 if (cmdline == 2 && mdio.md_type == MD_VNODE) 273 if (mdio.md_file[0] == '\0') 274 errx(1, "must specify -f for -t vnode"); 275 if (mdio.md_type == MD_VNODE && 276 (mdio.md_options & MD_READONLY) == 0) { 277 if (access(mdio.md_file, W_OK) < 0 && 278 (errno == EACCES || errno == EPERM || errno == EROFS)) { 279 fprintf(stderr, 280 "WARNING: opening backing store: %s readonly\n", 281 mdio.md_file); 282 mdio.md_options |= MD_READONLY; 283 } 284 } 285 if (action == LIST) { 286 if (mdio.md_options & MD_AUTOUNIT) { 287 /* 288 * Listing all devices. This is why we pass NULL 289 * together with OPT_LIST. 290 */ 291 md_list(NULL, OPT_LIST | vflag); 292 } else { 293 return (md_query(mdunit)); 294 } 295 } else if (action == ATTACH) { 296 if (cmdline < 2) 297 usage(); 298 i = ioctl(fd, MDIOCATTACH, &mdio); 299 if (i < 0) 300 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 301 if (mdio.md_options & MD_AUTOUNIT) 302 printf("%s%d\n", nflag ? "" : MD_NAME, mdio.md_unit); 303 } else if (action == DETACH) { 304 if (mdio.md_options & MD_AUTOUNIT) 305 usage(); 306 i = ioctl(fd, MDIOCDETACH, &mdio); 307 if (i < 0) 308 err(1, "ioctl(/dev/%s)", MDCTL_NAME); 309 } else 310 usage(); 311 close (fd); 312 return (0); 313 } 314 315 /* 316 * Lists md(4) disks. Is used also as a query routine, since it handles XML 317 * interface. 'units' can be NULL for listing memory disks. It might be 318 * coma-separated string containing md(4) disk names. 'opt' distinguished 319 * between list and query mode. 320 */ 321 static int 322 md_list(char *units, int opt) 323 { 324 struct gmesh gm; 325 struct gprovider *pp; 326 struct gconf *gc; 327 struct gident *gid; 328 struct devstat *gsp; 329 struct ggeom *gg; 330 struct gclass *gcl; 331 void *sq; 332 int retcode, found; 333 char *type, *file, *length; 334 335 type = file = length = NULL; 336 337 retcode = geom_gettree(&gm); 338 if (retcode != 0) 339 return (-1); 340 retcode = geom_stats_open(); 341 if (retcode != 0) 342 return (-1); 343 sq = geom_stats_snapshot_get(); 344 if (sq == NULL) 345 return (-1); 346 347 found = 0; 348 while ((gsp = geom_stats_snapshot_next(sq)) != NULL) { 349 gid = geom_lookupid(&gm, gsp->id); 350 if (gid == NULL) 351 continue; 352 if (gid->lg_what == ISPROVIDER) { 353 pp = gid->lg_ptr; 354 gg = pp->lg_geom; 355 gcl = gg->lg_class; 356 if (strcmp(gcl->lg_name, CLASS_NAME_MD) != 0) 357 continue; 358 if ((opt & OPT_UNIT) && (units != NULL)) { 359 retcode = md_find(units, pp->lg_name); 360 if (retcode != 1) 361 continue; 362 else 363 found = 1; 364 } 365 gc = &pp->lg_config; 366 printf("%s", pp->lg_name); 367 if (opt & OPT_VERBOSE || opt & OPT_UNIT) { 368 type = geom_config_get(gc, "type"); 369 if (strcmp(type, "vnode") == 0) 370 file = geom_config_get(gc, "file"); 371 length = geom_config_get(gc, "length"); 372 if (length == NULL) 373 length = "<a>"; 374 printf("\t%s\t", type); 375 md_prthumanval(length); 376 if (file != NULL) { 377 printf("\t%s", file); 378 file = NULL; 379 } 380 } 381 opt |= OPT_DONE; 382 if ((opt & OPT_LIST) && !(opt & OPT_VERBOSE)) 383 printf(" "); 384 else 385 printf("\n"); 386 } 387 } 388 if ((opt & OPT_LIST) && (opt & OPT_DONE) && !(opt & OPT_VERBOSE)) 389 printf("\n"); 390 /* XXX: Check if it's enough to clean everything. */ 391 geom_stats_snapshot_free(sq); 392 if ((opt & OPT_UNIT) && found) 393 return (0); 394 else 395 return (-1); 396 } 397 398 /* 399 * Returns value of 'name' from gconfig structure. 400 */ 401 static char * 402 geom_config_get(struct gconf *g, char *name) 403 { 404 struct gconfig *gce; 405 406 LIST_FOREACH(gce, g, lg_config) { 407 if (strcmp(gce->lg_name, name) == 0) 408 return (gce->lg_val); 409 } 410 return (NULL); 411 } 412 413 /* 414 * List is comma separated list of MD disks. name is a 415 * device name we look for. Returns 1 if found and 0 416 * otherwise. 417 */ 418 static int 419 md_find(char *list, const char *name) 420 { 421 int ret; 422 char num[16]; 423 char *ptr, *p, *u; 424 425 ret = 0; 426 ptr = strdup(list); 427 if (ptr == NULL) 428 return (-1); 429 for (p = ptr; (u = strsep(&p, ",")) != NULL;) { 430 if (strncmp(u, "/dev/", 5) == 0) 431 u += 5; 432 /* Just in case user specified number instead of full name */ 433 snprintf(num, sizeof(num), "md%s", u); 434 if (strcmp(u, name) == 0 || strcmp(num, name) == 0) { 435 ret = 1; 436 break; 437 } 438 } 439 free(ptr); 440 return (ret); 441 } 442 443 static void 444 md_prthumanval(char *length) 445 { 446 char buf[6]; 447 uint64_t bytes; 448 char *endptr; 449 450 bytes = strtoul(length, &endptr, 10); 451 if (bytes == (unsigned)ULONG_MAX || *endptr != '\0') 452 return; 453 humanize_number(buf, sizeof(buf) - (bytes < 0 ? 0 : 1), 454 bytes, "", HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL); 455 (void)printf("%6s", buf); 456 } 457 458 int 459 md_query(char *name) 460 { 461 return (md_list(name, OPT_UNIT)); 462 } 463