geom_mirror.c revision 330737
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 330737 2018-03-10 04:17:01Z asomers $"); 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 bzero(sector, sizeof(sector)); 180 nargs = gctl_get_int(req, "nargs"); 181 if (nargs < 2) { 182 gctl_error(req, "Too few arguments."); 183 return; 184 } 185 186 strlcpy(md.md_magic, G_MIRROR_MAGIC, sizeof(md.md_magic)); 187 md.md_version = G_MIRROR_VERSION; 188 str = gctl_get_ascii(req, "arg0"); 189 strlcpy(md.md_name, str, sizeof(md.md_name)); 190 md.md_mid = arc4random(); 191 md.md_all = nargs - 1; 192 md.md_mflags = 0; 193 md.md_dflags = 0; 194 md.md_genid = 0; 195 md.md_syncid = 1; 196 md.md_sync_offset = 0; 197 val = gctl_get_intmax(req, "slice"); 198 md.md_slice = val; 199 str = gctl_get_ascii(req, "balance"); 200 bal = balance_id(str); 201 if (bal == -1) { 202 gctl_error(req, "Invalid balance algorithm."); 203 return; 204 } 205 md.md_balance = bal; 206 if (gctl_get_int(req, "noautosync")) 207 md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOAUTOSYNC; 208 if (gctl_get_int(req, "nofailsync")) 209 md.md_mflags |= G_MIRROR_DEVICE_FLAG_NOFAILSYNC; 210 hardcode = gctl_get_int(req, "hardcode"); 211 212 /* 213 * Calculate sectorsize by finding least common multiple from 214 * sectorsizes of every disk and find the smallest mediasize. 215 */ 216 mediasize = 0; 217 sectorsize = 0; 218 for (i = 1; i < nargs; i++) { 219 unsigned ssize; 220 off_t msize; 221 222 str = gctl_get_ascii(req, "arg%d", i); 223 msize = g_get_mediasize(str); 224 ssize = g_get_sectorsize(str); 225 if (msize == 0 || ssize == 0) { 226 gctl_error(req, "Can't get informations about %s: %s.", 227 str, strerror(errno)); 228 return; 229 } 230 msize -= ssize; 231 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 232 mediasize = msize; 233 if (sectorsize == 0) 234 sectorsize = ssize; 235 else 236 sectorsize = g_lcm(sectorsize, ssize); 237 } 238 md.md_mediasize = mediasize; 239 md.md_sectorsize = sectorsize; 240 md.md_mediasize -= (md.md_mediasize % md.md_sectorsize); 241 242 /* 243 * Clear last sector first, to spoil all components if device exists. 244 */ 245 for (i = 1; i < nargs; i++) { 246 str = gctl_get_ascii(req, "arg%d", i); 247 error = g_metadata_clear(str, NULL); 248 if (error != 0) { 249 gctl_error(req, "Can't store metadata on %s: %s.", str, 250 strerror(error)); 251 return; 252 } 253 } 254 255 /* 256 * Ok, store metadata (use disk number as priority). 257 */ 258 for (i = 1; i < nargs; i++) { 259 str = gctl_get_ascii(req, "arg%d", i); 260 md.md_did = arc4random(); 261 md.md_priority = i - 1; 262 md.md_provsize = g_get_mediasize(str); 263 assert(md.md_provsize != 0); 264 if (!hardcode) 265 bzero(md.md_provider, sizeof(md.md_provider)); 266 else { 267 if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 268 str += sizeof(_PATH_DEV) - 1; 269 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 270 } 271 mirror_metadata_encode(&md, sector); 272 error = g_metadata_store(str, sector, sizeof(sector)); 273 if (error != 0) { 274 fprintf(stderr, "Can't store metadata on %s: %s.\n", 275 str, strerror(error)); 276 gctl_error(req, "Not fully done."); 277 continue; 278 } 279 if (verbose) 280 printf("Metadata value stored on %s.\n", str); 281 } 282} 283 284static void 285mirror_clear(struct gctl_req *req) 286{ 287 const char *name; 288 int error, i, nargs; 289 290 nargs = gctl_get_int(req, "nargs"); 291 if (nargs < 1) { 292 gctl_error(req, "Too few arguments."); 293 return; 294 } 295 296 for (i = 0; i < nargs; i++) { 297 name = gctl_get_ascii(req, "arg%d", i); 298 error = g_metadata_clear(name, G_MIRROR_MAGIC); 299 if (error != 0) { 300 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 301 name, strerror(error)); 302 gctl_error(req, "Not fully done."); 303 continue; 304 } 305 if (verbose) 306 printf("Metadata cleared on %s.\n", name); 307 } 308} 309 310static void 311mirror_dump(struct gctl_req *req) 312{ 313 struct g_mirror_metadata md, tmpmd; 314 const char *name; 315 int error, i, nargs; 316 317 nargs = gctl_get_int(req, "nargs"); 318 if (nargs < 1) { 319 gctl_error(req, "Too few arguments."); 320 return; 321 } 322 323 for (i = 0; i < nargs; i++) { 324 name = gctl_get_ascii(req, "arg%d", i); 325 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 326 G_MIRROR_MAGIC); 327 if (error != 0) { 328 fprintf(stderr, "Can't read metadata from %s: %s.\n", 329 name, strerror(error)); 330 gctl_error(req, "Not fully done."); 331 continue; 332 } 333 if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) { 334 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 335 name); 336 gctl_error(req, "Not fully done."); 337 continue; 338 } 339 printf("Metadata on %s:\n", name); 340 mirror_metadata_dump(&md); 341 printf("\n"); 342 } 343} 344 345static void 346mirror_activate(struct gctl_req *req) 347{ 348 struct g_mirror_metadata md, tmpmd; 349 const char *name, *path; 350 int error, i, nargs; 351 352 nargs = gctl_get_int(req, "nargs"); 353 if (nargs < 2) { 354 gctl_error(req, "Too few arguments."); 355 return; 356 } 357 name = gctl_get_ascii(req, "arg0"); 358 359 for (i = 1; i < nargs; i++) { 360 path = gctl_get_ascii(req, "arg%d", i); 361 error = g_metadata_read(path, (u_char *)&tmpmd, sizeof(tmpmd), 362 G_MIRROR_MAGIC); 363 if (error != 0) { 364 fprintf(stderr, "Cannot read metadata from %s: %s.\n", 365 path, strerror(error)); 366 gctl_error(req, "Not fully done."); 367 continue; 368 } 369 if (mirror_metadata_decode((u_char *)&tmpmd, &md) != 0) { 370 fprintf(stderr, 371 "MD5 hash mismatch for provider %s, skipping.\n", 372 path); 373 gctl_error(req, "Not fully done."); 374 continue; 375 } 376 if (strcmp(md.md_name, name) != 0) { 377 fprintf(stderr, 378 "Provider %s is not the mirror %s component.\n", 379 path, name); 380 gctl_error(req, "Not fully done."); 381 continue; 382 } 383 md.md_dflags &= ~G_MIRROR_DISK_FLAG_INACTIVE; 384 mirror_metadata_encode(&md, (u_char *)&tmpmd); 385 error = g_metadata_store(path, (u_char *)&tmpmd, sizeof(tmpmd)); 386 if (error != 0) { 387 fprintf(stderr, "Cannot write metadata from %s: %s.\n", 388 path, strerror(error)); 389 gctl_error(req, "Not fully done."); 390 continue; 391 } 392 if (verbose) 393 printf("Provider %s activated.\n", path); 394 } 395} 396 397static struct gclass * 398find_class(struct gmesh *mesh, const char *name) 399{ 400 struct gclass *classp; 401 402 LIST_FOREACH(classp, &mesh->lg_class, lg_class) { 403 if (strcmp(classp->lg_name, name) == 0) 404 return (classp); 405 } 406 return (NULL); 407} 408 409static struct ggeom * 410find_geom(struct gclass *classp, const char *name) 411{ 412 struct ggeom *gp; 413 414 LIST_FOREACH(gp, &classp->lg_geom, lg_geom) { 415 if (strcmp(gp->lg_name, name) == 0) 416 return (gp); 417 } 418 return (NULL); 419} 420 421static void 422mirror_resize(struct gctl_req *req, unsigned flags __unused) 423{ 424 struct gmesh mesh; 425 struct gclass *classp; 426 struct ggeom *gp; 427 struct gprovider *pp; 428 struct gconsumer *cp; 429 off_t size; 430 int error, nargs; 431 const char *name; 432 char ssize[30]; 433 434 nargs = gctl_get_int(req, "nargs"); 435 if (nargs < 1) { 436 gctl_error(req, "Too few arguments."); 437 return; 438 } 439 error = geom_gettree(&mesh); 440 if (error) 441 errc(EXIT_FAILURE, error, "Cannot get GEOM tree"); 442 name = gctl_get_ascii(req, "class"); 443 if (name == NULL) 444 abort(); 445 classp = find_class(&mesh, name); 446 if (classp == NULL) 447 errx(EXIT_FAILURE, "Class %s not found.", name); 448 name = gctl_get_ascii(req, "arg0"); 449 if (name == NULL) 450 abort(); 451 gp = find_geom(classp, name); 452 if (gp == NULL) 453 errx(EXIT_FAILURE, "No such geom: %s.", name); 454 pp = LIST_FIRST(&gp->lg_provider); 455 if (pp == NULL) 456 errx(EXIT_FAILURE, "Provider of geom %s not found.", name); 457 size = pp->lg_mediasize; 458 name = gctl_get_ascii(req, "size"); 459 if (name == NULL) 460 errx(EXIT_FAILURE, "The size is not specified."); 461 if (*name == '*') { 462#define CSZ(c) ((c)->lg_provider->lg_mediasize - \ 463 (c)->lg_provider->lg_sectorsize) 464 /* Find the maximum possible size */ 465 LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { 466 if (CSZ(cp) > size) 467 size = CSZ(cp); 468 } 469 LIST_FOREACH(cp, &gp->lg_consumer, lg_consumer) { 470 if (CSZ(cp) < size) 471 size = CSZ(cp); 472 } 473#undef CSZ 474 if (size == pp->lg_mediasize) 475 errx(EXIT_FAILURE, 476 "Cannot expand provider %s\n", 477 pp->lg_name); 478 } else { 479 error = g_parse_lba(name, pp->lg_sectorsize, &size); 480 if (error) 481 errc(EXIT_FAILURE, error, "Invalid size param"); 482 size *= pp->lg_sectorsize; 483 } 484 snprintf(ssize, sizeof(ssize), "%ju", (uintmax_t)size); 485 gctl_change_param(req, "size", -1, ssize); 486 geom_deletetree(&mesh); 487 gctl_issue(req); 488} 489