geom_raid3.c revision 163888
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 163888 2006-11-01 22:51:49Z 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_BOOL }, 60 { 'd', "dynamic", NULL, G_TYPE_BOOL }, 61 { 'f', "failsync", NULL, G_TYPE_BOOL }, 62 { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 63 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 64 { 'n', "noautosync", NULL, G_TYPE_BOOL }, 65 { 'r', "round_robin", NULL, G_TYPE_BOOL }, 66 { 'R', "noround_robin", NULL, G_TYPE_BOOL }, 67 { 'w', "verify", NULL, G_TYPE_BOOL }, 68 { 'W', "noverify", NULL, G_TYPE_BOOL }, 69 G_OPT_SENTINEL 70 }, 71 "[-adfFhnrRvwW] name" 72 }, 73 { "dump", 0, raid3_main, G_NULL_OPTS, 74 "prov ..." 75 }, 76 { "insert", G_FLAG_VERBOSE, NULL, 77 { 78 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 79 { 'n', "number", NULL, G_TYPE_NUMBER }, 80 G_OPT_SENTINEL 81 }, 82 "[-hv] <-n number> name prov" 83 }, 84 { "label", G_FLAG_VERBOSE, raid3_main, 85 { 86 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 87 { 'F', "nofailsync", NULL, G_TYPE_BOOL }, 88 { 'n', "noautosync", NULL, G_TYPE_BOOL }, 89 { 'r', "round_robin", NULL, G_TYPE_BOOL }, 90 { 'w', "verify", NULL, G_TYPE_BOOL }, 91 G_OPT_SENTINEL 92 }, 93 "[-hFnrvw] name prov prov prov ..." 94 }, 95 { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 96 "[-v] name prov" 97 }, 98 { "remove", G_FLAG_VERBOSE, NULL, 99 { 100 { 'n', "number", NULL, G_TYPE_NUMBER }, 101 G_OPT_SENTINEL 102 }, 103 "[-v] <-n number> name" 104 }, 105 { "stop", G_FLAG_VERBOSE, NULL, 106 { 107 { 'f', "force", NULL, G_TYPE_BOOL }, 108 G_OPT_SENTINEL 109 }, 110 "[-fv] name ..." 111 }, 112 G_CMD_SENTINEL 113}; 114 115static int verbose = 0; 116 117static void 118raid3_main(struct gctl_req *req, unsigned flags) 119{ 120 const char *name; 121 122 if ((flags & G_FLAG_VERBOSE) != 0) 123 verbose = 1; 124 125 name = gctl_get_ascii(req, "verb"); 126 if (name == NULL) { 127 gctl_error(req, "No '%s' argument.", "verb"); 128 return; 129 } 130 if (strcmp(name, "label") == 0) 131 raid3_label(req); 132 else if (strcmp(name, "clear") == 0) 133 raid3_clear(req); 134 else if (strcmp(name, "dump") == 0) 135 raid3_dump(req); 136 else 137 gctl_error(req, "Unknown command: %s.", name); 138} 139 140static void 141raid3_label(struct gctl_req *req) 142{ 143 struct g_raid3_metadata md; 144 u_char sector[512]; 145 const char *str; 146 unsigned sectorsize, ssize; 147 off_t mediasize, msize; 148 int hardcode, round_robin, verify; 149 int error, i, nargs; 150 151 nargs = gctl_get_int(req, "nargs"); 152 if (nargs < 4) { 153 gctl_error(req, "Too few arguments."); 154 return; 155 } 156 if (bitcount32(nargs - 2) != 1) { 157 gctl_error(req, "Invalid number of components."); 158 return; 159 } 160 161 strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 162 md.md_version = G_RAID3_VERSION; 163 str = gctl_get_ascii(req, "arg0"); 164 strlcpy(md.md_name, str, sizeof(md.md_name)); 165 md.md_id = arc4random(); 166 md.md_all = nargs - 1; 167 md.md_mflags = 0; 168 md.md_dflags = 0; 169 md.md_genid = 0; 170 md.md_syncid = 1; 171 md.md_sync_offset = 0; 172 if (gctl_get_int(req, "noautosync")) 173 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 174 if (gctl_get_int(req, "nofailsync")) 175 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOFAILSYNC; 176 round_robin = gctl_get_int(req, "round_robin"); 177 if (round_robin) 178 md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 179 verify = gctl_get_int(req, "verify"); 180 if (verify) 181 md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 182 if (round_robin && verify) { 183 gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 184 return; 185 } 186 hardcode = gctl_get_int(req, "hardcode"); 187 188 /* 189 * Calculate sectorsize by finding least common multiple from 190 * sectorsizes of every disk and find the smallest mediasize. 191 */ 192 mediasize = 0; 193 sectorsize = 0; 194 for (i = 1; i < nargs; i++) { 195 str = gctl_get_ascii(req, "arg%d", i); 196 msize = g_get_mediasize(str); 197 ssize = g_get_sectorsize(str); 198 if (msize == 0 || ssize == 0) { 199 gctl_error(req, "Can't get informations about %s: %s.", 200 str, strerror(errno)); 201 return; 202 } 203 msize -= ssize; 204 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 205 mediasize = msize; 206 if (sectorsize == 0) 207 sectorsize = ssize; 208 else 209 sectorsize = g_lcm(sectorsize, ssize); 210 } 211 md.md_mediasize = mediasize * (nargs - 2); 212 md.md_sectorsize = sectorsize * (nargs - 2); 213 md.md_mediasize -= (md.md_mediasize % md.md_sectorsize); 214 215 /* 216 * Clear last sector first, to spoil all components if device exists. 217 */ 218 for (i = 1; i < nargs; i++) { 219 str = gctl_get_ascii(req, "arg%d", i); 220 error = g_metadata_clear(str, NULL); 221 if (error != 0) { 222 gctl_error(req, "Can't store metadata on %s: %s.", str, 223 strerror(error)); 224 return; 225 } 226 } 227 228 /* 229 * Ok, store metadata (use disk number as priority). 230 */ 231 for (i = 1; i < nargs; i++) { 232 str = gctl_get_ascii(req, "arg%d", i); 233 msize = g_get_mediasize(str); 234 ssize = g_get_sectorsize(str); 235 if (mediasize < msize - ssize) { 236 fprintf(stderr, 237 "warning: %s: only %jd bytes from %jd bytes used.\n", 238 str, (intmax_t)mediasize, (intmax_t)(msize - ssize)); 239 } 240 241 md.md_no = i - 1; 242 md.md_provsize = msize; 243 if (!hardcode) 244 bzero(md.md_provider, sizeof(md.md_provider)); 245 else { 246 if (strncmp(str, _PATH_DEV, strlen(_PATH_DEV)) == 0) 247 str += strlen(_PATH_DEV); 248 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 249 } 250 if (verify && md.md_no == md.md_all - 1) { 251 /* 252 * In "verify" mode, force synchronization of parity 253 * component on start. 254 */ 255 md.md_syncid = 0; 256 } 257 raid3_metadata_encode(&md, sector); 258 error = g_metadata_store(str, sector, sizeof(sector)); 259 if (error != 0) { 260 fprintf(stderr, "Can't store metadata on %s: %s.\n", 261 str, strerror(error)); 262 gctl_error(req, "Not fully done."); 263 continue; 264 } 265 if (verbose) 266 printf("Metadata value stored on %s.\n", str); 267 } 268} 269 270static void 271raid3_clear(struct gctl_req *req) 272{ 273 const char *name; 274 int error, i, nargs; 275 276 nargs = gctl_get_int(req, "nargs"); 277 if (nargs < 1) { 278 gctl_error(req, "Too few arguments."); 279 return; 280 } 281 282 for (i = 0; i < nargs; i++) { 283 name = gctl_get_ascii(req, "arg%d", i); 284 error = g_metadata_clear(name, G_RAID3_MAGIC); 285 if (error != 0) { 286 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 287 name, strerror(error)); 288 gctl_error(req, "Not fully done."); 289 continue; 290 } 291 if (verbose) 292 printf("Metadata cleared on %s.\n", name); 293 } 294} 295 296static void 297raid3_dump(struct gctl_req *req) 298{ 299 struct g_raid3_metadata md, tmpmd; 300 const char *name; 301 int error, i, nargs; 302 303 nargs = gctl_get_int(req, "nargs"); 304 if (nargs < 1) { 305 gctl_error(req, "Too few arguments."); 306 return; 307 } 308 309 for (i = 0; i < nargs; i++) { 310 name = gctl_get_ascii(req, "arg%d", i); 311 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 312 G_RAID3_MAGIC); 313 if (error != 0) { 314 fprintf(stderr, "Can't read metadata from %s: %s.\n", 315 name, strerror(error)); 316 gctl_error(req, "Not fully done."); 317 continue; 318 } 319 if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 320 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 321 name); 322 gctl_error(req, "Not fully done."); 323 continue; 324 } 325 printf("Metadata on %s:\n", name); 326 raid3_metadata_dump(&md); 327 printf("\n"); 328 } 329} 330