geom_mirror.c revision 260503
1/*- 2 * Copyright (c) 2004-2009 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD: stable/10/sbin/geom/class/mirror/geom_mirror.c 260503 2014-01-10 07:48:36Z ae $"); 29 30#include <sys/param.h> 31#include <err.h> 32#include <errno.h> 33#include <paths.h> 34#include <stdio.h> 35#include <stdlib.h> 36#include <stdint.h> 37#include <string.h> 38#include <strings.h> 39#include <assert.h> 40#include <libgeom.h> 41#include <geom/mirror/g_mirror.h> 42#include <core/geom.h> 43#include <misc/subr.h> 44 45uint32_t lib_version = G_LIB_VERSION; 46uint32_t version = G_MIRROR_VERSION; 47 48#define GMIRROR_BALANCE "load" 49#define GMIRROR_SLICE "4096" 50#define GMIRROR_PRIORITY "0" 51 52static void mirror_main(struct gctl_req *req, unsigned flags); 53static void mirror_activate(struct gctl_req *req); 54static void mirror_clear(struct gctl_req *req); 55static void mirror_dump(struct gctl_req *req); 56static void mirror_label(struct gctl_req *req); 57static void mirror_resize(struct gctl_req *req, unsigned flags); 58 59struct g_command class_commands[] = { 60 { "activate", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS, 61 "[-v] name prov ..." 62 }, 63 { "clear", G_FLAG_VERBOSE, mirror_main, G_NULL_OPTS, 64 "[-v] prov ..." 65 }, 66 { "configure", G_FLAG_VERBOSE, NULL, 67 { 68 { 'a', "autosync", NULL, G_TYPE_BOOL }, 69 { 'b', "balance", "", G_TYPE_STRING }, 70 { 'd', "dynamic", NULL, G_TYPE_BOOL }, 71 { 'f', "failsync", NULL, G_TYPE_BOOL }, 72 { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 73 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 74 { 'n', "noautosync", NULL, G_TYPE_BOOL }, 75 { 'p', "priority", "-1", G_TYPE_NUMBER }, 76 { 's', "slice", "-1", G_TYPE_NUMBER }, 77 G_OPT_SENTINEL 78 }, 79 "[-adfFhnv] [-b balance] [-s slice] name\n" 80 "[-v] -p priority name prov" 81 }, 82 { "deactivate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 83 "[-v] name prov ..." 84 }, 85 { "destroy", G_FLAG_VERBOSE, NULL, 86 { 87 { 'f', "force", NULL, G_TYPE_BOOL }, 88 G_OPT_SENTINEL 89 }, 90 "[-fv] name ..." 91 }, 92 { "dump", 0, mirror_main, G_NULL_OPTS, 93 "prov ..." 94 }, 95 { "forget", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 96 "name ..." 97 }, 98 { "label", G_FLAG_VERBOSE, mirror_main, 99 { 100 { 'b', "balance", GMIRROR_BALANCE, G_TYPE_STRING }, 101 { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 102 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 103 { 'n', "noautosync", NULL, G_TYPE_BOOL }, 104 { 's', "slice", GMIRROR_SLICE, G_TYPE_NUMBER }, 105 G_OPT_SENTINEL 106 }, 107 "[-Fhnv] [-b balance] [-s slice] name prov ..." 108 }, 109 { "insert", G_FLAG_VERBOSE, NULL, 110 { 111 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 112 { 'i', "inactive", NULL, G_TYPE_BOOL }, 113 { 'p', "priority", GMIRROR_PRIORITY, G_TYPE_NUMBER }, 114 G_OPT_SENTINEL 115 }, 116 "[-hiv] [-p priority] name prov ..." 117 }, 118 { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 119 "[-v] name prov ..." 120 }, 121 { "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 122 "[-v] name prov ..." 123 }, 124 { "resize", G_FLAG_VERBOSE, mirror_resize, 125 { 126 { 's', "size", "*", G_TYPE_STRING }, 127 G_OPT_SENTINEL 128 }, 129 "[-s size] [-v] name" 130 }, 131 { "stop", G_FLAG_VERBOSE, NULL, 132 { 133 { 'f', "force", NULL, G_TYPE_BOOL }, 134 G_OPT_SENTINEL 135 }, 136 "[-fv] name ..." 137 }, 138 G_CMD_SENTINEL 139}; 140 141static int verbose = 0; 142 143static void 144mirror_main(struct gctl_req *req, unsigned flags) 145{ 146 const char *name; 147 148 if ((flags & G_FLAG_VERBOSE) != 0) 149 verbose = 1; 150 151 name = gctl_get_ascii(req, "verb"); 152 if (name == NULL) { 153 gctl_error(req, "No '%s' argument.", "verb"); 154 return; 155 } 156 if (strcmp(name, "label") == 0) 157 mirror_label(req); 158 else if (strcmp(name, "clear") == 0) 159 mirror_clear(req); 160 else if (strcmp(name, "dump") == 0) 161 mirror_dump(req); 162 else if (strcmp(name, "activate") == 0) 163 mirror_activate(req); 164 else 165 gctl_error(req, "Unknown command: %s.", name); 166} 167 168static void 169mirror_label(struct gctl_req *req) 170{ 171 struct g_mirror_metadata md; 172 u_char sector[512]; 173 const char *str; 174 unsigned sectorsize; 175 off_t mediasize; 176 intmax_t val; 177 int error, i, nargs, bal, hardcode; 178 179 nargs = gctl_get_int(req, "nargs"); 180 if (nargs < 2) { 181 gctl_error(req, "Too few arguments."); 182 return; 183 } 184 185 strlcpy(md.md_magic, G_MIRROR_MAGIC, sizeof(md.md_magic)); 186 md.md_version = G_MIRROR_VERSION; 187 str = gctl_get_ascii(req, "arg0"); 188 strlcpy(md.md_name, str, sizeof(md.md_name)); 189 md.md_mid = arc4random(); 190 md.md_all = nargs - 1; 191 md.md_mflags = 0; 192 md.md_dflags = 0; 193 md.md_genid = 0; 194 md.md_syncid = 1; 195 md.md_sync_offset = 0; 196 val = gctl_get_intmax(req, "slice"); 197 md.md_slice = val; 198 str = gctl_get_ascii(req, "balance"); 199 bal = balance_id(str); 200 if (bal == -1) { 201 gctl_error(req, "Invalid balance algorithm."); 202 return; 203 } 204 md.md_balance = bal; 205 if (gctl_get_int(req, "noautosync")) 206 md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC; 207 if (gctl_get_int(req, "nofailsync")) 208 md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOFAILSYNC; 209 hardcode = gctl_get_int(req, "hardcode"); 210 211 /* 212 * Calculate sectorsize by finding least common multiple from 213 * sectorsizes of every disk and find the smallest mediasize. 214 */ 215 mediasize = 0; 216 sectorsize = 0; 217 for (i = 1; i < nargs; i++) { 218 unsigned ssize; 219 off_t msize; 220 221 str = gctl_get_ascii(req, "arg%d", i); 222 msize = g_get_mediasize(str); 223 ssize = g_get_sectorsize(str); 224 if (msize == 0 || ssize == 0) { 225 gctl_error(req, "Can't get informations about %s: %s.", 226 str, strerror(errno)); 227 return; 228 } 229 msize -= ssize; 230 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 231 mediasize = msize; 232 if (sectorsize == 0) 233 sectorsize = ssize; 234 else 235 sectorsize = g_lcm(sectorsize, ssize); 236 } 237 md.md_mediasize = mediasize; 238 md.md_sectorsize = sectorsize; 239 md.md_mediasize -= (md.md_mediasize % md.md_sectorsize); 240 241 /* 242 * Clear last sector first, to spoil all components if device exists. 243 */ 244 for (i = 1; i < nargs; i++) { 245 str = gctl_get_ascii(req, "arg%d", i); 246 error = g_metadata_clear(str, NULL); 247 if (error != 0) { 248 gctl_error(req, "Can't store metadata on %s: %s.", str, 249 strerror(error)); 250 return; 251 } 252 } 253 254 /* 255 * Ok, store metadata (use disk number as priority). 256 */ 257 for (i = 1; i < nargs; i++) { 258 str = gctl_get_ascii(req, "arg%d", i); 259 md.md_did = arc4random(); 260 md.md_priority = i - 1; 261 md.md_provsize = g_get_mediasize(str); 262 assert(md.md_provsize != 0); 263 if (!hardcode) 264 bzero(md.md_provider, sizeof(md.md_provider)); 265 else { 266 if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 267 str += sizeof(_PATH_DEV) - 1; 268 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 269 } 270 mirror_metadata_encode(&md, sector); 271 error = g_metadata_store(str, sector, sizeof(sector)); 272 if (error != 0) { 273 fprintf(stderr, "Can't store metadata on %s: %s.\n", 274 str, strerror(error)); 275 gctl_error(req, "Not fully done."); 276 continue; 277 } 278 if (verbose) 279 printf("Metadata value stored on %s.\n", str); 280 } 281} 282 283static void 284mirror_clear(struct gctl_req *req) 285{ 286 const char *name; 287 int error, i, nargs; 288 289 nargs = gctl_get_int(req, "nargs"); 290 if (nargs < 1) { 291 gctl_error(req, "Too few arguments."); 292 return; 293 } 294 295 for (i = 0; i < nargs; i++) { 296 name = gctl_get_ascii(req, "arg%d", i); 297 error = g_metadata_clear(name, G_MIRROR_MAGIC); 298 if (error != 0) { 299 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 300 name, strerror(error)); 301 gctl_error(req, "Not fully done."); 302 continue; 303 } 304 if (verbose) 305 printf("Metadata cleared on %s.\n", name); 306 } 307} 308 309static void 310mirror_dump(struct gctl_req *req) 311{ 312 struct g_mirror_metadata md, tmpmd; 313 const char *name; 314 int error, i, nargs; 315 316 nargs = gctl_get_int(req, "nargs"); 317 if (nargs < 1) { 318 gctl_error(req, "Too few arguments."); 319 return; 320 } 321 322 for (i = 0; i < nargs; i++) { 323 name = gctl_get_ascii(req, "arg%d", i); 324 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 325 G_MIRROR_MAGIC); 326 if (error != 0) { 327 fprintf(stderr, "Can't read metadata from %s: %s.\n", 328 name, strerror(error)); 329 gctl_error(req, "Not fully done."); 330 continue; 331 } 332 if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) { 333 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 334 name); 335 gctl_error(req, "Not fully done."); 336 continue; 337 } 338 printf("Metadata on %s:\n", name); 339 mirror_metadata_dump(&md); 340 printf("\n"); 341 } 342} 343 344static void 345mirror_activate(struct gctl_req *req) 346{ 347 struct g_mirror_metadata md, tmpmd; 348 const char *name, *path; 349 int error, i, nargs; 350 351 nargs = gctl_get_int(req, "nargs"); 352 if (nargs < 2) { 353 gctl_error(req, "Too few arguments."); 354 return; 355 } 356 name = gctl_get_ascii(req, "arg0"); 357 358 for (i = 1; i < nargs; i++) { 359 path = gctl_get_ascii(req, "arg%d", i); 360 error = g_metadata_read(path, (u_char *)&tmpmd, sizeof(tmpmd), 361 G_MIRROR_MAGIC); 362 if (error != 0) { 363 fprintf(stderr, "Cannot read metadata from %s: %s.\n", 364 path, strerror(error)); 365 gctl_error(req, "Not fully done."); 366 continue; 367 } 368 if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) { 369 fprintf(stderr, 370 "MD5 hash mismatch for provider %s, skipping.\n", 371 path); 372 gctl_error(req, "Not fully done."); 373 continue; 374 } 375 if (strcmp(md.md_name, name) != 0) { 376 fprintf(stderr, 377 "Provider %s is not the mirror %s component.\n", 378 path, name); 379 gctl_error(req, "Not fully done."); 380 continue; 381 } 382 md.md_dflags &= ~G_MIRROR_DISK_FLAG_INACTIVE; 383 mirror_metadata_encode(&md, (u_char *)&tmpmd); 384 error = g_metadata_store(path, (u_char *)&tmpmd, sizeof(tmpmd)); 385 if (error != 0) { 386 fprintf(stderr, "Cannot write metadata from %s: %s.\n", 387 path, strerror(error)); 388 gctl_error(req, "Not fully done."); 389 continue; 390 } 391 if (verbose) 392 printf("Provider %s activated.\n", path); 393 } 394} 395 396static struct gclass * 397find_class(struct gmesh *mesh, const char *name) 398{ 399 struct gclass *classp; 400 401 LIST_FOREACH(classp, &mesh->lg_class, lg_class) { 402 if (strcmp(classp->lg_name, name) == 0) 403 return (classp); 404 } 405 return (NULL); 406} 407 408static struct ggeom * 409find_geom(struct gclass *classp, const char *name) 410{ 411 struct ggeom *gp; 412 413 LIST_FOREACH(gp, &classp->lg_geom, lg_geom) { 414 if (strcmp(gp->lg_name, name) == 0) 415 return (gp); 416 } 417 return (NULL); 418} 419 420static void 421mirror_resize(struct gctl_req *req, unsigned flags __unused) 422{ 423 struct gmesh mesh; 424 struct gclass *classp; 425 struct ggeom *gp; 426 struct gprovider *pp; 427 struct gconsumer *cp; 428 off_t size; 429 int error, nargs; 430 const char *name; 431 char ssize[30]; 432 433 nargs = gctl_get_int(req, "nargs"); 434 if (nargs < 1) { 435 gctl_error(req, "Too few arguments."); 436 return; 437 } 438 error = geom_gettree(&mesh); 439 if (error) 440 errc(EXIT_FAILURE, error, "Cannot get GEOM tree"); 441 name = gctl_get_ascii(req, "class"); 442 if (name == NULL) 443 abort(); 444 classp = find_class(&mesh, name); 445 if (classp == NULL) 446 errx(EXIT_FAILURE, "Class %s not found.", name); 447 name = gctl_get_ascii(req, "arg0"); 448 if (name == NULL) 449 abort(); 450 gp = find_geom(classp, name); 451 if (gp == NULL) 452 errx(EXIT_FAILURE, "No such geom: %s.", name); 453 pp = LIST_FIRST(&gp->lg_provider); 454 if (pp == NULL) 455 errx(EXIT_FAILURE, "Provider of geom %s not found.", name); 456 size = pp->lg_mediasize; 457 name = gctl_get_ascii(req, "size"); 458 if (name == NULL) 459 errx(EXIT_FAILURE, "The size is not specified."); 460 if (*name == '*') { 461#define CSZ(c) ((c)->lg_provider->lg_mediasize - \ 462 (c)->lg_provider->lg_sectorsize) 463 /* Find the maximum possible size */ 464 LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { 465 if (CSZ(cp) > size) 466 size = CSZ(cp); 467 } 468 LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { 469 if (CSZ(cp) < size) 470 size = CSZ(cp); 471 } 472#undef CSZ 473 if (size == pp->lg_mediasize) 474 errx(EXIT_FAILURE, 475 "Cannot expand provider %s\n", 476 pp->lg_name); 477 } else { 478 error = g_parse_lba(name, pp->lg_sectorsize, &size); 479 if (error) 480 errc(EXIT_FAILURE, error, "Invalid size param"); 481 size *= pp->lg_sectorsize; 482 } 483 snprintf(ssize, sizeof(ssize), "%ju", (uintmax_t)size); 484 gctl_change_param(req, "size", -1, ssize); 485 geom_deletetree(&mesh); 486 gctl_issue(req); 487} 488