geom_raid3.c revision 147947
1/*- 2 * Copyright (c) 2004-2005 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: head/sbin/geom/class/raid3/geom_raid3.c 147947 2005-07-13 07:46:55Z pjd $"); 29 30#include <sys/param.h> 31#include <errno.h> 32#include <paths.h> 33#include <stdio.h> 34#include <stdlib.h> 35#include <stdint.h> 36#include <string.h> 37#include <strings.h> 38#include <assert.h> 39#include <libgeom.h> 40#include <geom/raid3/g_raid3.h> 41#include <core/geom.h> 42#include <misc/subr.h> 43 44 45uint32_t lib_version = G_LIB_VERSION; 46uint32_t version = G_RAID3_VERSION; 47 48static void raid3_main(struct gctl_req *req, unsigned f); 49static void raid3_clear(struct gctl_req *req); 50static void raid3_dump(struct gctl_req *req); 51static void raid3_label(struct gctl_req *req); 52 53struct g_command class_commands[] = { 54 { "clear", G_FLAG_VERBOSE, raid3_main, G_NULL_OPTS, 55 "[-v] prov ..." 56 }, 57 { "configure", G_FLAG_VERBOSE, NULL, 58 { 59 { 'a', "autosync", NULL, G_TYPE_NONE }, 60 { 'd', "dynamic", NULL, G_TYPE_NONE }, 61 { 'h', "hardcode", NULL, G_TYPE_NONE }, 62 { 'n', "noautosync", NULL, G_TYPE_NONE }, 63 { 'r', "round_robin", NULL, G_TYPE_NONE }, 64 { 'R', "noround_robin", NULL, G_TYPE_NONE }, 65 { 'w', "verify", NULL, G_TYPE_NONE }, 66 { 'W', "noverify", NULL, G_TYPE_NONE }, 67 G_OPT_SENTINEL 68 }, 69 "[-adhnrRvwW] name" 70 }, 71 { "dump", 0, raid3_main, G_NULL_OPTS, 72 "prov ..." 73 }, 74 { "insert", G_FLAG_VERBOSE, NULL, 75 { 76 { 'h', "hardcode", NULL, G_TYPE_NONE }, 77 { 'n', "number", NULL, G_TYPE_NUMBER }, 78 G_OPT_SENTINEL 79 }, 80 "[-hv] <-n number> name prov" 81 }, 82 { "label", G_FLAG_VERBOSE, raid3_main, 83 { 84 { 'h', "hardcode", NULL, G_TYPE_NONE }, 85 { 'n', "noautosync", NULL, G_TYPE_NONE }, 86 { 'r', "round_robin", NULL, G_TYPE_NONE }, 87 { 'w', "verify", NULL, G_TYPE_NONE }, 88 G_OPT_SENTINEL 89 }, 90 "[-hnrvw] name prov prov prov ..." 91 }, 92 { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 93 "[-v] name prov" 94 }, 95 { "remove", G_FLAG_VERBOSE, NULL, 96 { 97 { 'n', "number", NULL, G_TYPE_NUMBER }, 98 G_OPT_SENTINEL 99 }, 100 "[-v] <-n number> name" 101 }, 102 { "stop", G_FLAG_VERBOSE, NULL, 103 { 104 { 'f', "force", NULL, G_TYPE_NONE }, 105 G_OPT_SENTINEL 106 }, 107 "[-fv] name ..." 108 }, 109 G_CMD_SENTINEL 110}; 111 112static int verbose = 0; 113 114static void 115raid3_main(struct gctl_req *req, unsigned flags) 116{ 117 const char *name; 118 119 if ((flags & G_FLAG_VERBOSE) != 0) 120 verbose = 1; 121 122 name = gctl_get_asciiparam(req, "verb"); 123 if (name == NULL) { 124 gctl_error(req, "No '%s' argument.", "verb"); 125 return; 126 } 127 if (strcmp(name, "label") == 0) 128 raid3_label(req); 129 else if (strcmp(name, "clear") == 0) 130 raid3_clear(req); 131 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 char param[16]; 144 int *hardcode, *nargs, *noautosync, *round_robin, *verify; 145 int error, i; 146 unsigned sectorsize, ssize; 147 off_t mediasize, msize; 148 149 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 150 if (nargs == NULL) { 151 gctl_error(req, "No '%s' argument.", "nargs"); 152 return; 153 } 154 if (*nargs < 4) { 155 gctl_error(req, "Too few arguments."); 156 return; 157 } 158#ifndef BITCOUNT 159#define BITCOUNT(x) (((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255) 160#define BX_(x) ((x) - (((x) >> 1) & 0x77777777) - \ 161 (((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111)) 162#endif 163 if (BITCOUNT(*nargs - 2) != 1) { 164 gctl_error(req, "Invalid number of components."); 165 return; 166 } 167 168 strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 169 md.md_version = G_RAID3_VERSION; 170 str = gctl_get_asciiparam(req, "arg0"); 171 if (str == NULL) { 172 gctl_error(req, "No 'arg%u' argument.", 0); 173 return; 174 } 175 strlcpy(md.md_name, str, sizeof(md.md_name)); 176 md.md_id = arc4random(); 177 md.md_all = *nargs - 1; 178 md.md_mflags = 0; 179 md.md_dflags = 0; 180 md.md_genid = 0; 181 md.md_syncid = 1; 182 md.md_sync_offset = 0; 183 noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync)); 184 if (noautosync == NULL) { 185 gctl_error(req, "No '%s' argument.", "noautosync"); 186 return; 187 } 188 if (*noautosync) 189 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 190 round_robin = gctl_get_paraml(req, "round_robin", sizeof(*round_robin)); 191 if (round_robin == NULL) { 192 gctl_error(req, "No '%s' argument.", "round_robin"); 193 return; 194 } 195 if (*round_robin) 196 md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 197 verify = gctl_get_paraml(req, "verify", sizeof(*verify)); 198 if (verify == NULL) { 199 gctl_error(req, "No '%s' argument.", "verify"); 200 return; 201 } 202 if (*verify) 203 md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 204 if (*round_robin && *verify) { 205 gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 206 return; 207 } 208 hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode)); 209 if (hardcode == NULL) { 210 gctl_error(req, "No '%s' argument.", "hardcode"); 211 return; 212 } 213 214 /* 215 * Calculate sectorsize by finding least common multiple from 216 * sectorsizes of every disk and find the smallest mediasize. 217 */ 218 mediasize = 0; 219 sectorsize = 0; 220 for (i = 1; i < *nargs; i++) { 221 snprintf(param, sizeof(param), "arg%u", i); 222 str = gctl_get_asciiparam(req, param); 223 224 msize = g_get_mediasize(str); 225 ssize = g_get_sectorsize(str); 226 if (msize == 0 || ssize == 0) { 227 gctl_error(req, "Can't get informations about %s: %s.", 228 str, strerror(errno)); 229 return; 230 } 231 msize -= ssize; 232 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 233 mediasize = msize; 234 if (sectorsize == 0) 235 sectorsize = ssize; 236 else 237 sectorsize = g_lcm(sectorsize, ssize); 238 } 239 md.md_mediasize = mediasize * (*nargs - 2); 240 md.md_sectorsize = sectorsize * (*nargs - 2); 241 242 /* 243 * Clear last sector first, to spoil all components if device exists. 244 */ 245 for (i = 1; i < *nargs; i++) { 246 snprintf(param, sizeof(param), "arg%u", i); 247 str = gctl_get_asciiparam(req, param); 248 249 error = g_metadata_clear(str, NULL); 250 if (error != 0) { 251 gctl_error(req, "Can't store metadata on %s: %s.", str, 252 strerror(error)); 253 return; 254 } 255 } 256 257 /* 258 * Ok, store metadata (use disk number as priority). 259 */ 260 for (i = 1; i < *nargs; i++) { 261 snprintf(param, sizeof(param), "arg%u", i); 262 str = gctl_get_asciiparam(req, param); 263 264 msize = g_get_mediasize(str); 265 ssize = g_get_sectorsize(str); 266 if (mediasize < msize - ssize) { 267 fprintf(stderr, 268 "warning: %s: only %jd bytes from %jd bytes used.\n", 269 str, (intmax_t)mediasize, (intmax_t)(msize - ssize)); 270 } 271 272 md.md_no = i - 1; 273 md.md_provsize = msize; 274 if (!*hardcode) 275 bzero(md.md_provider, sizeof(md.md_provider)); 276 else { 277 if (strncmp(str, _PATH_DEV, strlen(_PATH_DEV)) == 0) 278 str += strlen(_PATH_DEV); 279 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 280 } 281 if (*verify && md.md_no == md.md_all - 1) { 282 /* 283 * In "verify" mode, force synchronization of parity 284 * component on start. 285 */ 286 md.md_syncid = 0; 287 } 288 raid3_metadata_encode(&md, sector); 289 error = g_metadata_store(str, sector, sizeof(sector)); 290 if (error != 0) { 291 fprintf(stderr, "Can't store metadata on %s: %s.\n", 292 str, strerror(error)); 293 gctl_error(req, "Not fully done."); 294 continue; 295 } 296 if (verbose) 297 printf("Metadata value stored on %s.\n", str); 298 } 299} 300 301static void 302raid3_clear(struct gctl_req *req) 303{ 304 const char *name; 305 char param[16]; 306 int *nargs, error, i; 307 308 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 309 if (nargs == NULL) { 310 gctl_error(req, "No '%s' argument.", "nargs"); 311 return; 312 } 313 if (*nargs < 1) { 314 gctl_error(req, "Too few arguments."); 315 return; 316 } 317 318 for (i = 0; i < *nargs; i++) { 319 snprintf(param, sizeof(param), "arg%u", i); 320 name = gctl_get_asciiparam(req, param); 321 322 error = g_metadata_clear(name, G_RAID3_MAGIC); 323 if (error != 0) { 324 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 325 name, strerror(error)); 326 gctl_error(req, "Not fully done."); 327 continue; 328 } 329 if (verbose) 330 printf("Metadata cleared on %s.\n", name); 331 } 332} 333 334static void 335raid3_dump(struct gctl_req *req) 336{ 337 struct g_raid3_metadata md, tmpmd; 338 const char *name; 339 char param[16]; 340 int *nargs, error, i; 341 342 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 343 if (nargs == NULL) { 344 gctl_error(req, "No '%s' argument.", "nargs"); 345 return; 346 } 347 if (*nargs < 1) { 348 gctl_error(req, "Too few arguments."); 349 return; 350 } 351 352 for (i = 0; i < *nargs; i++) { 353 snprintf(param, sizeof(param), "arg%u", i); 354 name = gctl_get_asciiparam(req, param); 355 356 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 357 G_RAID3_MAGIC); 358 if (error != 0) { 359 fprintf(stderr, "Can't read metadata from %s: %s.\n", 360 name, strerror(error)); 361 gctl_error(req, "Not fully done."); 362 continue; 363 } 364 if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 365 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 366 name); 367 gctl_error(req, "Not fully done."); 368 continue; 369 } 370 printf("Metadata on %s:\n", name); 371 raid3_metadata_dump(&md); 372 printf("\n"); 373 } 374} 375