geom_raid3.c revision 217305
1182918Smarius/*- 2182918Smarius * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3182918Smarius * All rights reserved. 4182918Smarius * 5182918Smarius * Redistribution and use in source and binary forms, with or without 6182918Smarius * modification, are permitted provided that the following conditions 7182918Smarius * are met: 8182918Smarius * 1. Redistributions of source code must retain the above copyright 9182918Smarius * notice, this list of conditions and the following disclaimer. 10182918Smarius * 2. Redistributions in binary form must reproduce the above copyright 11182918Smarius * notice, this list of conditions and the following disclaimer in the 12182918Smarius * documentation and/or other materials provided with the distribution. 13182918Smarius * 14182918Smarius * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15182918Smarius * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16182918Smarius * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17182918Smarius * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18182918Smarius * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19182918Smarius * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20182918Smarius * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21182918Smarius * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22182918Smarius * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23182918Smarius * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24182918Smarius * SUCH DAMAGE. 25182918Smarius */ 26182918Smarius 27182918Smarius#include <sys/cdefs.h> 28182918Smarius__FBSDID("$FreeBSD: head/sbin/geom/class/raid3/geom_raid3.c 217305 2011-01-12 13:55:01Z ae $"); 29182918Smarius 30182918Smarius#include <sys/param.h> 31182918Smarius#include <errno.h> 32182918Smarius#include <paths.h> 33182918Smarius#include <stdio.h> 34182918Smarius#include <stdlib.h> 35182918Smarius#include <stdint.h> 36182918Smarius#include <string.h> 37182918Smarius#include <strings.h> 38182918Smarius#include <assert.h> 39182918Smarius#include <libgeom.h> 40182918Smarius#include <geom/raid3/g_raid3.h> 41182918Smarius#include <core/geom.h> 42182918Smarius#include <misc/subr.h> 43182918Smarius 44182918Smarius 45182918Smariusuint32_t lib_version = G_LIB_VERSION; 46182918Smariusuint32_t version = G_RAID3_VERSION; 47182918Smarius 48182918Smariusstatic void raid3_main(struct gctl_req *req, unsigned f); 49182918Smariusstatic void raid3_clear(struct gctl_req *req); 50182918Smariusstatic void raid3_dump(struct gctl_req *req); 51182918Smariusstatic void raid3_label(struct gctl_req *req); 52182918Smarius 53182918Smariusstruct g_command class_commands[] = { 54182918Smarius { "clear", G_FLAG_VERBOSE, raid3_main, G_NULL_OPTS, 55182918Smarius "[-v] prov ..." 56182918Smarius }, 57182918Smarius { "configure", G_FLAG_VERBOSE, NULL, 58182918Smarius { 59182918Smarius { 'a', "autosync", NULL, G_TYPE_BOOL }, 60182918Smarius { 'd', "dynamic", NULL, G_TYPE_BOOL }, 61182918Smarius { 'f', "failsync", NULL, G_TYPE_BOOL }, 62182918Smarius { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 63182918Smarius { 'h', "hardcode", NULL, G_TYPE_BOOL }, 64182918Smarius { 'n', "noautosync", NULL, G_TYPE_BOOL }, 65182918Smarius { 'r', "round_robin", NULL, G_TYPE_BOOL }, 66182918Smarius { 'R', "noround_robin", NULL, G_TYPE_BOOL }, 67182918Smarius { 'w', "verify", NULL, G_TYPE_BOOL }, 68182918Smarius { 'W', "noverify", NULL, G_TYPE_BOOL }, 69182918Smarius G_OPT_SENTINEL 70182918Smarius }, 71182918Smarius "[-adfFhnrRvwW] name" 72182918Smarius }, 73182918Smarius { "dump", 0, raid3_main, G_NULL_OPTS, 74182918Smarius "prov ..." 75182918Smarius }, 76182918Smarius { "insert", G_FLAG_VERBOSE, NULL, 77182918Smarius { 78182918Smarius { 'h', "hardcode", NULL, G_TYPE_BOOL }, 79182918Smarius { 'n', "number", NULL, G_TYPE_NUMBER }, 80182918Smarius G_OPT_SENTINEL 81182918Smarius }, 82182918Smarius "[-hv] <-n number> name prov" 83182918Smarius }, 84182918Smarius { "label", G_FLAG_VERBOSE, raid3_main, 85182918Smarius { 86182918Smarius { 'h', "hardcode", NULL, G_TYPE_BOOL }, 87182918Smarius { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 88182918Smarius { 'n', "noautosync", NULL, G_TYPE_BOOL }, 89182918Smarius { 'r', "round_robin", NULL, G_TYPE_BOOL }, 90182918Smarius { 's', "sectorsize", "0", G_TYPE_NUMBER }, 91182918Smarius { 'w', "verify", NULL, G_TYPE_BOOL }, 92182918Smarius G_OPT_SENTINEL 93182918Smarius }, 94182918Smarius "[-hFnrvw] [-s blocksize] name prov prov prov ..." 95182918Smarius }, 96182918Smarius { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 97182918Smarius "[-v] name prov" 98182918Smarius }, 99182918Smarius { "remove", G_FLAG_VERBOSE, NULL, 100182918Smarius { 101182918Smarius { 'n', "number", NULL, G_TYPE_NUMBER }, 102182918Smarius G_OPT_SENTINEL 103182918Smarius }, 104182918Smarius "[-v] <-n number> name" 105182918Smarius }, 106182918Smarius { "stop", G_FLAG_VERBOSE, NULL, 107182918Smarius { 108182918Smarius { 'f', "force", NULL, G_TYPE_BOOL }, 109182918Smarius G_OPT_SENTINEL 110182918Smarius }, 111182918Smarius "[-fv] name ..." 112182918Smarius }, 113182918Smarius G_CMD_SENTINEL 114182918Smarius}; 115182918Smarius 116182918Smariusstatic int verbose = 0; 117182918Smarius 118182918Smariusstatic void 119182918Smariusraid3_main(struct gctl_req *req, unsigned flags) 120182918Smarius{ 121182918Smarius const char *name; 122182918Smarius 123182918Smarius if ((flags & G_FLAG_VERBOSE) != 0) 124182918Smarius verbose = 1; 125182918Smarius 126182918Smarius name = gctl_get_ascii(req, "verb"); 127182918Smarius if (name == NULL) { 128182918Smarius gctl_error(req, "No '%s' argument.", "verb"); 129182918Smarius return; 130182918Smarius } 131182918Smarius if (strcmp(name, "label") == 0) 132182918Smarius raid3_label(req); 133182918Smarius else if (strcmp(name, "clear") == 0) 134182918Smarius raid3_clear(req); 135182918Smarius else if (strcmp(name, "dump") == 0) 136182918Smarius raid3_dump(req); 137182918Smarius else 138182918Smarius gctl_error(req, "Unknown command: %s.", name); 139182918Smarius} 140182918Smarius 141182918Smariusstatic void 142182918Smariusraid3_label(struct gctl_req *req) 143182918Smarius{ 144182918Smarius struct g_raid3_metadata md; 145182918Smarius u_char sector[512]; 146182918Smarius const char *str; 147182918Smarius unsigned sectorsize, ssize; 148182918Smarius off_t mediasize, msize; 149182918Smarius int hardcode, round_robin, verify; 150182918Smarius int error, i, nargs; 151182918Smarius 152182918Smarius nargs = gctl_get_int(req, "nargs"); 153182918Smarius if (nargs < 4) { 154182918Smarius gctl_error(req, "Too few arguments."); 155182918Smarius return; 156182918Smarius } 157182918Smarius if (bitcount32(nargs - 2) != 1) { 158182918Smarius gctl_error(req, "Invalid number of components."); 159182918Smarius return; 160182918Smarius } 161182918Smarius 162182918Smarius strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 163182918Smarius md.md_version = G_RAID3_VERSION; 164182918Smarius str = gctl_get_ascii(req, "arg0"); 165182918Smarius strlcpy(md.md_name, str, sizeof(md.md_name)); 166182918Smarius md.md_id = arc4random(); 167182918Smarius md.md_all = nargs - 1; 168182918Smarius md.md_mflags = 0; 169182918Smarius md.md_dflags = 0; 170182918Smarius md.md_genid = 0; 171182918Smarius md.md_syncid = 1; 172182918Smarius md.md_sync_offset = 0; 173182918Smarius if (gctl_get_int(req, "noautosync")) 174182918Smarius md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 175182918Smarius if (gctl_get_int(req, "nofailsync")) 176182918Smarius md.md_mflags |= G_RAID3_DEVICE_FLAG_NOFAILSYNC; 177182918Smarius round_robin = gctl_get_int(req, "round_robin"); 178182918Smarius if (round_robin) 179182918Smarius md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 180182918Smarius verify = gctl_get_int(req, "verify"); 181182918Smarius if (verify) 182182918Smarius md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 183182918Smarius if (round_robin && verify) { 184182918Smarius gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 185182918Smarius return; 186182918Smarius } 187182918Smarius hardcode = gctl_get_int(req, "hardcode"); 188182918Smarius 189182918Smarius /* 190182918Smarius * Calculate sectorsize by finding least common multiple from 191182918Smarius * sectorsizes of every disk and find the smallest mediasize. 192182918Smarius */ 193182918Smarius mediasize = 0; 194182918Smarius sectorsize = gctl_get_intmax(req, "sectorsize"); 195182918Smarius for (i = 1; i < nargs; i++) { 196182918Smarius str = gctl_get_ascii(req, "arg%d", i); 197182918Smarius msize = g_get_mediasize(str); 198182918Smarius ssize = g_get_sectorsize(str); 199182918Smarius if (msize == 0 || ssize == 0) { 200182918Smarius gctl_error(req, "Can't get informations about %s: %s.", 201182918Smarius str, strerror(errno)); 202182918Smarius return; 203182918Smarius } 204182918Smarius msize -= ssize; 205182918Smarius if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 206182918Smarius mediasize = msize; 207182918Smarius if (sectorsize == 0) 208182918Smarius sectorsize = ssize; 209182918Smarius else 210182918Smarius sectorsize = g_lcm(sectorsize, ssize); 211182918Smarius } 212182918Smarius md.md_mediasize = mediasize * (nargs - 2); 213182918Smarius md.md_sectorsize = sectorsize * (nargs - 2); 214182918Smarius md.md_mediasize -= (md.md_mediasize % md.md_sectorsize); 215182918Smarius 216182918Smarius if (md.md_sectorsize > MAXPHYS) { 217182918Smarius gctl_error(req, "The blocksize is too big."); 218182918Smarius return; 219182918Smarius } 220182918Smarius 221182918Smarius /* 222182918Smarius * Clear last sector first, to spoil all components if device exists. 223182918Smarius */ 224182918Smarius for (i = 1; i < nargs; i++) { 225182918Smarius str = gctl_get_ascii(req, "arg%d", i); 226182918Smarius error = g_metadata_clear(str, NULL); 227 if (error != 0) { 228 gctl_error(req, "Can't store metadata on %s: %s.", str, 229 strerror(error)); 230 return; 231 } 232 } 233 234 /* 235 * Ok, store metadata (use disk number as priority). 236 */ 237 for (i = 1; i < nargs; i++) { 238 str = gctl_get_ascii(req, "arg%d", i); 239 msize = g_get_mediasize(str); 240 ssize = g_get_sectorsize(str); 241 if (mediasize < msize - ssize) { 242 fprintf(stderr, 243 "warning: %s: only %jd bytes from %jd bytes used.\n", 244 str, (intmax_t)mediasize, (intmax_t)(msize - ssize)); 245 } 246 247 md.md_no = i - 1; 248 md.md_provsize = msize; 249 if (!hardcode) 250 bzero(md.md_provider, sizeof(md.md_provider)); 251 else { 252 if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 253 str += sizeof(_PATH_DEV) - 1; 254 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 255 } 256 if (verify && md.md_no == md.md_all - 1) { 257 /* 258 * In "verify" mode, force synchronization of parity 259 * component on start. 260 */ 261 md.md_syncid = 0; 262 } 263 raid3_metadata_encode(&md, sector); 264 error = g_metadata_store(str, sector, sizeof(sector)); 265 if (error != 0) { 266 fprintf(stderr, "Can't store metadata on %s: %s.\n", 267 str, strerror(error)); 268 gctl_error(req, "Not fully done."); 269 continue; 270 } 271 if (verbose) 272 printf("Metadata value stored on %s.\n", str); 273 } 274} 275 276static void 277raid3_clear(struct gctl_req *req) 278{ 279 const char *name; 280 int error, i, nargs; 281 282 nargs = gctl_get_int(req, "nargs"); 283 if (nargs < 1) { 284 gctl_error(req, "Too few arguments."); 285 return; 286 } 287 288 for (i = 0; i < nargs; i++) { 289 name = gctl_get_ascii(req, "arg%d", i); 290 error = g_metadata_clear(name, G_RAID3_MAGIC); 291 if (error != 0) { 292 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 293 name, strerror(error)); 294 gctl_error(req, "Not fully done."); 295 continue; 296 } 297 if (verbose) 298 printf("Metadata cleared on %s.\n", name); 299 } 300} 301 302static void 303raid3_dump(struct gctl_req *req) 304{ 305 struct g_raid3_metadata md, tmpmd; 306 const char *name; 307 int error, i, nargs; 308 309 nargs = gctl_get_int(req, "nargs"); 310 if (nargs < 1) { 311 gctl_error(req, "Too few arguments."); 312 return; 313 } 314 315 for (i = 0; i < nargs; i++) { 316 name = gctl_get_ascii(req, "arg%d", i); 317 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 318 G_RAID3_MAGIC); 319 if (error != 0) { 320 fprintf(stderr, "Can't read metadata from %s: %s.\n", 321 name, strerror(error)); 322 gctl_error(req, "Not fully done."); 323 continue; 324 } 325 if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 326 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 327 name); 328 gctl_error(req, "Not fully done."); 329 continue; 330 } 331 printf("Metadata on %s:\n", name); 332 raid3_metadata_dump(&md); 333 printf("\n"); 334 } 335} 336