geom_raid3.c revision 213662
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 213662 2010-10-09 20:20:27Z ae $"); 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 { 's', "sectorsize", "0", G_TYPE_NUMBER }, 91 { 'w', "verify", NULL, G_TYPE_BOOL }, 92 G_OPT_SENTINEL 93 }, 94 "[-hFnrvw] [-s blocksize] name prov prov prov ..." 95 }, 96 { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 97 "[-v] name prov" 98 }, 99 { "remove", G_FLAG_VERBOSE, NULL, 100 { 101 { 'n', "number", NULL, G_TYPE_NUMBER }, 102 G_OPT_SENTINEL 103 }, 104 "[-v] <-n number> name" 105 }, 106 { "stop", G_FLAG_VERBOSE, NULL, 107 { 108 { 'f', "force", NULL, G_TYPE_BOOL }, 109 G_OPT_SENTINEL 110 }, 111 "[-fv] name ..." 112 }, 113 G_CMD_SENTINEL 114}; 115 116static int verbose = 0; 117 118static void 119raid3_main(struct gctl_req *req, unsigned flags) 120{ 121 const char *name; 122 123 if ((flags & G_FLAG_VERBOSE) != 0) 124 verbose = 1; 125 126 name = gctl_get_ascii(req, "verb"); 127 if (name == NULL) { 128 gctl_error(req, "No '%s' argument.", "verb"); 129 return; 130 } 131 if (strcmp(name, "label") == 0) 132 raid3_label(req); 133 else if (strcmp(name, "clear") == 0) 134 raid3_clear(req); 135 else if (strcmp(name, "dump") == 0) 136 raid3_dump(req); 137 else 138 gctl_error(req, "Unknown command: %s.", name); 139} 140 141static void 142raid3_label(struct gctl_req *req) 143{ 144 struct g_raid3_metadata md; 145 u_char sector[512]; 146 const char *str; 147 unsigned sectorsize, ssize; 148 off_t mediasize, msize; 149 int hardcode, round_robin, verify; 150 int error, i, nargs; 151 152 nargs = gctl_get_int(req, "nargs"); 153 if (nargs < 4) { 154 gctl_error(req, "Too few arguments."); 155 return; 156 } 157 if (bitcount32(nargs - 2) != 1) { 158 gctl_error(req, "Invalid number of components."); 159 return; 160 } 161 162 strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 163 md.md_version = G_RAID3_VERSION; 164 str = gctl_get_ascii(req, "arg0"); 165 strlcpy(md.md_name, str, sizeof(md.md_name)); 166 md.md_id = arc4random(); 167 md.md_all = nargs - 1; 168 md.md_mflags = 0; 169 md.md_dflags = 0; 170 md.md_genid = 0; 171 md.md_syncid = 1; 172 md.md_sync_offset = 0; 173 if (gctl_get_int(req, "noautosync")) 174 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 175 if (gctl_get_int(req, "nofailsync")) 176 md.md_mflags |= G_RAID3_DEVICE_FLAG_NOFAILSYNC; 177 round_robin = gctl_get_int(req, "round_robin"); 178 if (round_robin) 179 md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 180 verify = gctl_get_int(req, "verify"); 181 if (verify) 182 md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 183 if (round_robin && verify) { 184 gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 185 return; 186 } 187 hardcode = gctl_get_int(req, "hardcode"); 188 189 /* 190 * Calculate sectorsize by finding least common multiple from 191 * sectorsizes of every disk and find the smallest mediasize. 192 */ 193 mediasize = 0; 194 sectorsize = gctl_get_intmax(req, "sectorsize"); 195 for (i = 1; i < nargs; i++) { 196 str = gctl_get_ascii(req, "arg%d", i); 197 msize = g_get_mediasize(str); 198 ssize = g_get_sectorsize(str); 199 if (msize == 0 || ssize == 0) { 200 gctl_error(req, "Can't get informations about %s: %s.", 201 str, strerror(errno)); 202 return; 203 } 204 msize -= ssize; 205 if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 206 mediasize = msize; 207 if (sectorsize == 0) 208 sectorsize = ssize; 209 else 210 sectorsize = g_lcm(sectorsize, ssize); 211 } 212 md.md_mediasize = mediasize * (nargs - 2); 213 md.md_sectorsize = sectorsize * (nargs - 2); 214 md.md_mediasize -= (md.md_mediasize % md.md_sectorsize); 215 216 /* 217 * Clear last sector first, to spoil all components if device exists. 218 */ 219 for (i = 1; i < nargs; i++) { 220 str = gctl_get_ascii(req, "arg%d", i); 221 error = g_metadata_clear(str, NULL); 222 if (error != 0) { 223 gctl_error(req, "Can't store metadata on %s: %s.", str, 224 strerror(error)); 225 return; 226 } 227 } 228 229 /* 230 * Ok, store metadata (use disk number as priority). 231 */ 232 for (i = 1; i < nargs; i++) { 233 str = gctl_get_ascii(req, "arg%d", i); 234 msize = g_get_mediasize(str); 235 ssize = g_get_sectorsize(str); 236 if (mediasize < msize - ssize) { 237 fprintf(stderr, 238 "warning: %s: only %jd bytes from %jd bytes used.\n", 239 str, (intmax_t)mediasize, (intmax_t)(msize - ssize)); 240 } 241 242 md.md_no = i - 1; 243 md.md_provsize = msize; 244 if (!hardcode) 245 bzero(md.md_provider, sizeof(md.md_provider)); 246 else { 247 if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 248 str += sizeof(_PATH_DEV) - 1; 249 strlcpy(md.md_provider, str, sizeof(md.md_provider)); 250 } 251 if (verify && md.md_no == md.md_all - 1) { 252 /* 253 * In "verify" mode, force synchronization of parity 254 * component on start. 255 */ 256 md.md_syncid = 0; 257 } 258 raid3_metadata_encode(&md, sector); 259 error = g_metadata_store(str, sector, sizeof(sector)); 260 if (error != 0) { 261 fprintf(stderr, "Can't store metadata on %s: %s.\n", 262 str, strerror(error)); 263 gctl_error(req, "Not fully done."); 264 continue; 265 } 266 if (verbose) 267 printf("Metadata value stored on %s.\n", str); 268 } 269} 270 271static void 272raid3_clear(struct gctl_req *req) 273{ 274 const char *name; 275 int error, i, nargs; 276 277 nargs = gctl_get_int(req, "nargs"); 278 if (nargs < 1) { 279 gctl_error(req, "Too few arguments."); 280 return; 281 } 282 283 for (i = 0; i < nargs; i++) { 284 name = gctl_get_ascii(req, "arg%d", i); 285 error = g_metadata_clear(name, G_RAID3_MAGIC); 286 if (error != 0) { 287 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 288 name, strerror(error)); 289 gctl_error(req, "Not fully done."); 290 continue; 291 } 292 if (verbose) 293 printf("Metadata cleared on %s.\n", name); 294 } 295} 296 297static void 298raid3_dump(struct gctl_req *req) 299{ 300 struct g_raid3_metadata md, tmpmd; 301 const char *name; 302 int error, i, nargs; 303 304 nargs = gctl_get_int(req, "nargs"); 305 if (nargs < 1) { 306 gctl_error(req, "Too few arguments."); 307 return; 308 } 309 310 for (i = 0; i < nargs; i++) { 311 name = gctl_get_ascii(req, "arg%d", i); 312 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 313 G_RAID3_MAGIC); 314 if (error != 0) { 315 fprintf(stderr, "Can't read metadata from %s: %s.\n", 316 name, strerror(error)); 317 gctl_error(req, "Not fully done."); 318 continue; 319 } 320 if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 321 fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 322 name); 323 gctl_error(req, "Not fully done."); 324 continue; 325 } 326 printf("Metadata on %s:\n", name); 327 raid3_metadata_dump(&md); 328 printf("\n"); 329 } 330} 331