geom_raid3.c revision 153190
120253Sjoerg/*- 220302Sjoerg * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 320302Sjoerg * All rights reserved. 420253Sjoerg * 520253Sjoerg * Redistribution and use in source and binary forms, with or without 620253Sjoerg * modification, are permitted provided that the following conditions 720253Sjoerg * are met: 820253Sjoerg * 1. Redistributions of source code must retain the above copyright 920302Sjoerg * notice, this list of conditions and the following disclaimer. 1020253Sjoerg * 2. Redistributions in binary form must reproduce the above copyright 1120253Sjoerg * notice, this list of conditions and the following disclaimer in the 1220253Sjoerg * documentation and/or other materials provided with the distribution. 1320253Sjoerg * 1420302Sjoerg * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 1520253Sjoerg * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1620253Sjoerg * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1720302Sjoerg * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 1820253Sjoerg * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1920253Sjoerg * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2020253Sjoerg * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2120253Sjoerg * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2220253Sjoerg * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2320253Sjoerg * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2420253Sjoerg * SUCH DAMAGE. 2520253Sjoerg */ 2620253Sjoerg 2730259Scharnier#include <sys/cdefs.h> 2830259Scharnier__FBSDID("$FreeBSD: head/sbin/geom/class/raid3/geom_raid3.c 153190 2005-12-07 01:38:27Z pjd $"); 2950479Speter 3030259Scharnier#include <sys/param.h> 3130259Scharnier#include <errno.h> 3230259Scharnier#include <paths.h> 3330259Scharnier#include <stdio.h> 3430259Scharnier#include <stdlib.h> 3520253Sjoerg#include <stdint.h> 3620253Sjoerg#include <string.h> 3720253Sjoerg#include <strings.h> 3830259Scharnier#include <assert.h> 3920253Sjoerg#include <libgeom.h> 4020253Sjoerg#include <geom/raid3/g_raid3.h> 4130259Scharnier#include <core/geom.h> 4220253Sjoerg#include <misc/subr.h> 4320253Sjoerg 44219408Sjkim 4520253Sjoerguint32_t lib_version = G_LIB_VERSION; 4620253Sjoerguint32_t version = G_RAID3_VERSION; 4720253Sjoerg 4820253Sjoergstatic void raid3_main(struct gctl_req *req, unsigned f); 4920253Sjoergstatic void raid3_clear(struct gctl_req *req); 5020253Sjoergstatic void raid3_dump(struct gctl_req *req); 5120253Sjoergstatic void raid3_label(struct gctl_req *req); 52168046Sle 53168046Slestruct g_command class_commands[] = { 5420253Sjoerg { "clear", G_FLAG_VERBOSE, raid3_main, G_NULL_OPTS, 5520253Sjoerg "[-v] prov ..." 5630259Scharnier }, 5720253Sjoerg { "configure", G_FLAG_VERBOSE, NULL, 5820253Sjoerg { 5920253Sjoerg { 'a', "autosync", NULL, G_TYPE_NONE }, 6020253Sjoerg { 'd', "dynamic", NULL, G_TYPE_NONE }, 6120253Sjoerg { 'h', "hardcode", NULL, G_TYPE_NONE }, 6220253Sjoerg { 'n', "noautosync", NULL, G_TYPE_NONE }, 6320253Sjoerg { 'r', "round_robin", NULL, G_TYPE_NONE }, 6420253Sjoerg { 'R', "noround_robin", NULL, G_TYPE_NONE }, 6520253Sjoerg { 'w', "verify", NULL, G_TYPE_NONE }, 66144841Sstefanf { 'W', "noverify", NULL, G_TYPE_NONE }, 6720253Sjoerg G_OPT_SENTINEL 6820253Sjoerg }, 6920253Sjoerg "[-adhnrRvwW] name" 7020253Sjoerg }, 7120253Sjoerg { "dump", 0, raid3_main, G_NULL_OPTS, 7220253Sjoerg "prov ..." 7320253Sjoerg }, 7420253Sjoerg { "insert", G_FLAG_VERBOSE, NULL, 7563094Sdavidn { 7663094Sdavidn { 'h', "hardcode", NULL, G_TYPE_NONE }, 77168046Sle { 'n', "number", NULL, G_TYPE_NUMBER }, 7820253Sjoerg G_OPT_SENTINEL 7920253Sjoerg }, 8063094Sdavidn "[-hv] <-n number> name prov" 8163094Sdavidn }, 8263094Sdavidn { "label", G_FLAG_VERBOSE, raid3_main, 8363094Sdavidn { 8420253Sjoerg { 'h', "hardcode", NULL, G_TYPE_NONE }, 85219408Sjkim { 'n', "noautosync", NULL, G_TYPE_NONE }, 8663094Sdavidn { 'r', "round_robin", NULL, G_TYPE_NONE }, 87168046Sle { 'w', "verify", NULL, G_TYPE_NONE }, 88168046Sle G_OPT_SENTINEL 89168046Sle }, 90168046Sle "[-hnrvw] name prov prov prov ..." 9120253Sjoerg }, 9263094Sdavidn { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 9363094Sdavidn "[-v] name prov" 9420253Sjoerg }, 9563094Sdavidn { "remove", G_FLAG_VERBOSE, NULL, 9620253Sjoerg { 9720253Sjoerg { 'n', "number", NULL, G_TYPE_NUMBER }, 9820253Sjoerg G_OPT_SENTINEL 9920253Sjoerg }, 10020253Sjoerg "[-v] <-n number> name" 10120253Sjoerg }, 10220253Sjoerg { "stop", G_FLAG_VERBOSE, NULL, 10320253Sjoerg { 10420253Sjoerg { 'f', "force", NULL, G_TYPE_NONE }, 10520253Sjoerg G_OPT_SENTINEL 10620253Sjoerg }, 10720253Sjoerg "[-fv] name ..." 10820253Sjoerg }, 10920253Sjoerg G_CMD_SENTINEL 11063094Sdavidn}; 11163094Sdavidn 11263094Sdavidnstatic int verbose = 0; 11363094Sdavidn 11463094Sdavidnstatic void 11520253Sjoergraid3_main(struct gctl_req *req, unsigned flags) 11620253Sjoerg{ 11720253Sjoerg const char *name; 11863094Sdavidn 11920253Sjoerg if ((flags & G_FLAG_VERBOSE) != 0) 12020253Sjoerg verbose = 1; 12120253Sjoerg 12220253Sjoerg name = gctl_get_ascii(req, "verb"); 12320253Sjoerg if (name == NULL) { 12420253Sjoerg gctl_error(req, "No '%s' argument.", "verb"); 12520253Sjoerg return; 12620253Sjoerg } 12720253Sjoerg if (strcmp(name, "label") == 0) 12820253Sjoerg raid3_label(req); 12920253Sjoerg else if (strcmp(name, "clear") == 0) 13020253Sjoerg raid3_clear(req); 13120267Sjoerg else if (strcmp(name, "dump") == 0) 132 raid3_dump(req); 133 else 134 gctl_error(req, "Unknown command: %s.", name); 135} 136 137static void 138raid3_label(struct gctl_req *req) 139{ 140 struct g_raid3_metadata md; 141 u_char sector[512]; 142 const char *str; 143 unsigned sectorsize, ssize; 144 off_t mediasize, msize; 145 int error, i, nargs, hardcode, noautosync, round_robin, verify; 146 147 nargs = gctl_get_int(req, "nargs"); 148 if (nargs < 4) { 149 gctl_error(req, "Too few arguments."); 150 return; 151 } 152 if (bitcount32(nargs - 2) != 1) { 153 gctl_error(req, "Invalid number of components."); 154 return; 155 } 156 157 strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 158 md.md_version = G_RAID3_VERSION; 159 str = gctl_get_ascii(req, "arg0"); 160 strlcpy(md.md_name, str, sizeof(md.md_name)); 161 md.md_id = arc4random(); 162 md.md_all = nargs - 1; 163 md.md_mflags = 0; 164 md.md_dflags = 0; 165 md.md_genid = 0; 166 md.md_syncid = 1; 167 md.md_sync_offset = 0; 168 noautosync = gctl_get_int(req, "noautosync"); 169 if (noautosync) 170 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 171 round_robin = gctl_get_int(req, "round_robin"); 172 if (round_robin) 173 md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 174 verify = gctl_get_int(req, "verify"); 175 if (verify) 176 md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 177 if (round_robin && verify) { 178 gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 179 return; 180 } 181 hardcode = gctl_get_int(req, "hardcode"); 182 183 /* 184 * Calculate sectorsize by finding least common multiple from 185 * sectorsizes of every disk and find the smallest mediasize. 186 */ 187 mediasize = 0; 188 sectorsize = 0; 189 for (i = 1; i < nargs; i++) { 190 str = gctl_get_ascii(req, "arg%d", i); 191 msize = g_get_mediasize(str); 192 ssize = g_get_sectorsize(str); 193 if (msize == 0 || ssize == 0) { 194 gctl_error(req, "Can't get informations about %s: %s.", 195 str, strerror(errno)); 196 return; 197 } 198 msize -= ssize; 199 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 200 mediasize = msize; 201 if (sectorsize == 0) 202 sectorsize = ssize; 203 else 204 sectorsize = g_lcm(sectorsize, ssize); 205 } 206 md.md_mediasize = mediasize * (nargs - 2); 207 md.md_sectorsize = sectorsize * (nargs - 2); 208 209 /* 210 * Clear last sector first, to spoil all components if device exists. 211 */ 212 for (i = 1; i < nargs; i++) { 213 str = gctl_get_ascii(req, "arg%d", i); 214 error = g_metadata_clear(str, NULL); 215 if (error != 0) { 216 gctl_error(req, "Can't store metadata on %s: %s.", str, 217 strerror(error)); 218 return; 219 } 220 } 221 222 /* 223 * Ok, store metadata (use disk number as priority). 224 */ 225 for (i = 1; i < nargs; i++) { 226 str = gctl_get_ascii(req, "arg%d", i); 227 msize = g_get_mediasize(str); 228 ssize = g_get_sectorsize(str); 229 if (mediasize < msize - ssize) { 230 fprintf(stderr, 231 "warning: %s: only %jd bytes from %jd bytes used.\n", 232 str, (intmax_t)mediasize, (intmax_t)(msize - ssize)); 233 } 234 235 md.md_no = i - 1; 236 md.md_provsize = msize; 237 if (!hardcode) 238 bzero(md.md_provider, sizeof(md.md_provider)); 239 else { 240 if (strncmp(str, _PATH_DEV, strlen(_PATH_DEV)) == 0) 241 str += strlen(_PATH_DEV); 242 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 243 } 244 if (verify && md.md_no == md.md_all - 1) { 245 /* 246 * In "verify" mode, force synchronization of parity 247 * component on start. 248 */ 249 md.md_syncid = 0; 250 } 251 raid3_metadata_encode(&md, sector); 252 error = g_metadata_store(str, sector, sizeof(sector)); 253 if (error != 0) { 254 fprintf(stderr, "Can't store metadata on %s: %s.\n", 255 str, strerror(error)); 256 gctl_error(req, "Not fully done."); 257 continue; 258 } 259 if (verbose) 260 printf("Metadata value stored on %s.\n", str); 261 } 262} 263 264static void 265raid3_clear(struct gctl_req *req) 266{ 267 const char *name; 268 int error, i, nargs; 269 270 nargs = gctl_get_int(req, "nargs"); 271 if (nargs < 1) { 272 gctl_error(req, "Too few arguments."); 273 return; 274 } 275 276 for (i = 0; i < nargs; i++) { 277 name = gctl_get_ascii(req, "arg%d", i); 278 error = g_metadata_clear(name, G_RAID3_MAGIC); 279 if (error != 0) { 280 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 281 name, strerror(error)); 282 gctl_error(req, "Not fully done."); 283 continue; 284 } 285 if (verbose) 286 printf("Metadata cleared on %s.\n", name); 287 } 288} 289 290static void 291raid3_dump(struct gctl_req *req) 292{ 293 struct g_raid3_metadata md, tmpmd; 294 const char *name; 295 int error, i, nargs; 296 297 nargs = gctl_get_int(req, "nargs"); 298 if (nargs < 1) { 299 gctl_error(req, "Too few arguments."); 300 return; 301 } 302 303 for (i = 0; i < nargs; i++) { 304 name = gctl_get_ascii(req, "arg%d", i); 305 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 306 G_RAID3_MAGIC); 307 if (error != 0) { 308 fprintf(stderr, "Can't read metadata from %s: %s.\n", 309 name, strerror(error)); 310 gctl_error(req, "Not fully done."); 311 continue; 312 } 313 if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 314 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 315 name); 316 gctl_error(req, "Not fully done."); 317 continue; 318 } 319 printf("Metadata on %s:\n", name); 320 raid3_metadata_dump(&md); 321 printf("\n"); 322 } 323} 324