geom_stripe.c revision 330726
1258057Sbr/*- 2261826Sbr * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3258057Sbr * 4258057Sbr * Copyright (c) 2004-2005 Pawel Jakub Dawidek <pjd@FreeBSD.org> 5258057Sbr * All rights reserved. 6258057Sbr * 7258057Sbr * Redistribution and use in source and binary forms, with or without 8258057Sbr * modification, are permitted provided that the following conditions 9258057Sbr * are met: 10258057Sbr * 1. Redistributions of source code must retain the above copyright 11258057Sbr * notice, this list of conditions and the following disclaimer. 12258057Sbr * 2. Redistributions in binary form must reproduce the above copyright 13258057Sbr * notice, this list of conditions and the following disclaimer in the 14258057Sbr * documentation and/or other materials provided with the distribution. 15258057Sbr * 16258057Sbr * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17258057Sbr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18258057Sbr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19258057Sbr * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20258057Sbr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21258057Sbr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22258057Sbr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23258057Sbr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24258057Sbr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25258057Sbr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26258057Sbr * SUCH DAMAGE. 27258057Sbr */ 28258057Sbr 29258057Sbr#include <sys/cdefs.h> 30258057Sbr__FBSDID("$FreeBSD: stable/11/sbin/geom/class/stripe/geom_stripe.c 330726 2018-03-10 02:15:45Z asomers $"); 31258057Sbr 32258057Sbr#include <sys/param.h> 33258057Sbr#include <errno.h> 34258057Sbr#include <paths.h> 35258057Sbr#include <stdio.h> 36258057Sbr#include <stdlib.h> 37258057Sbr#include <stdint.h> 38258057Sbr#include <string.h> 39258057Sbr#include <strings.h> 40258057Sbr#include <assert.h> 41261416Sbr#include <libgeom.h> 42261826Sbr#include <geom/stripe/g_stripe.h> 43261416Sbr 44#include "core/geom.h" 45#include "misc/subr.h" 46 47 48uint32_t lib_version = G_LIB_VERSION; 49uint32_t version = G_STRIPE_VERSION; 50 51#define GSTRIPE_STRIPESIZE "65536" 52 53static void stripe_main(struct gctl_req *req, unsigned flags); 54static void stripe_clear(struct gctl_req *req); 55static void stripe_dump(struct gctl_req *req); 56static void stripe_label(struct gctl_req *req); 57 58struct g_command class_commands[] = { 59 { "clear", G_FLAG_VERBOSE, stripe_main, G_NULL_OPTS, 60 "[-v] prov ..." 61 }, 62 { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, 63 { 64 { 's', "stripesize", GSTRIPE_STRIPESIZE, G_TYPE_NUMBER }, 65 G_OPT_SENTINEL 66 }, 67 "[-v] [-s stripesize] name prov prov ..." 68 }, 69 { "destroy", G_FLAG_VERBOSE, NULL, 70 { 71 { 'f', "force", NULL, G_TYPE_BOOL }, 72 G_OPT_SENTINEL 73 }, 74 "[-fv] name ..." 75 }, 76 { "dump", 0, stripe_main, G_NULL_OPTS, 77 "prov ..." 78 }, 79 { "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, stripe_main, 80 { 81 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 82 { 's', "stripesize", GSTRIPE_STRIPESIZE, G_TYPE_NUMBER }, 83 G_OPT_SENTINEL 84 }, 85 "[-hv] [-s stripesize] name prov prov ..." 86 }, 87 { "stop", G_FLAG_VERBOSE, NULL, 88 { 89 { 'f', "force", NULL, G_TYPE_BOOL }, 90 G_OPT_SENTINEL 91 }, 92 "[-fv] name ..." 93 }, 94 G_CMD_SENTINEL 95}; 96 97static int verbose = 0; 98 99static void 100stripe_main(struct gctl_req *req, unsigned flags) 101{ 102 const char *name; 103 104 if ((flags & G_FLAG_VERBOSE) != 0) 105 verbose = 1; 106 107 name = gctl_get_ascii(req, "verb"); 108 if (name == NULL) { 109 gctl_error(req, "No '%s' argument.", "verb"); 110 return; 111 } 112 if (strcmp(name, "label") == 0) 113 stripe_label(req); 114 else if (strcmp(name, "clear") == 0) 115 stripe_clear(req); 116 else if (strcmp(name, "dump") == 0) 117 stripe_dump(req); 118 else 119 gctl_error(req, "Unknown command: %s.", name); 120} 121 122static void 123stripe_label(struct gctl_req *req) 124{ 125 struct g_stripe_metadata md; 126 intmax_t stripesize; 127 off_t compsize, msize; 128 u_char sector[512]; 129 unsigned ssize, secsize; 130 const char *name; 131 int error, i, nargs, hardcode; 132 133 bzero(sector, sizeof(sector)); 134 nargs = gctl_get_int(req, "nargs"); 135 if (nargs < 3) { 136 gctl_error(req, "Too few arguments."); 137 return; 138 } 139 hardcode = gctl_get_int(req, "hardcode"); 140 141 /* 142 * Clear last sector first to spoil all components if device exists. 143 */ 144 compsize = 0; 145 secsize = 0; 146 for (i = 1; i < nargs; i++) { 147 name = gctl_get_ascii(req, "arg%d", i); 148 msize = g_get_mediasize(name); 149 ssize = g_get_sectorsize(name); 150 if (msize == 0 || ssize == 0) { 151 gctl_error(req, "Can't get informations about %s: %s.", 152 name, strerror(errno)); 153 return; 154 } 155 msize -= ssize; 156 if (compsize == 0 || (compsize > 0 && msize < compsize)) 157 compsize = msize; 158 if (secsize == 0) 159 secsize = ssize; 160 else 161 secsize = g_lcm(secsize, ssize); 162 163 error = g_metadata_clear(name, NULL); 164 if (error != 0) { 165 gctl_error(req, "Can't store metadata on %s: %s.", name, 166 strerror(error)); 167 return; 168 } 169 } 170 171 strlcpy(md.md_magic, G_STRIPE_MAGIC, sizeof(md.md_magic)); 172 md.md_version = G_STRIPE_VERSION; 173 name = gctl_get_ascii(req, "arg0"); 174 strlcpy(md.md_name, name, sizeof(md.md_name)); 175 md.md_id = arc4random(); 176 md.md_all = nargs - 1; 177 stripesize = gctl_get_intmax(req, "stripesize"); 178 if ((stripesize % secsize) != 0) { 179 gctl_error(req, "Stripesize should be multiple of %u.", 180 secsize); 181 return; 182 } 183 md.md_stripesize = stripesize; 184 185 /* 186 * Ok, store metadata. 187 */ 188 for (i = 1; i < nargs; i++) { 189 name = gctl_get_ascii(req, "arg%d", i); 190 msize = g_get_mediasize(name); 191 ssize = g_get_sectorsize(name); 192 if (compsize < msize - ssize) { 193 fprintf(stderr, 194 "warning: %s: only %jd bytes from %jd bytes used.\n", 195 name, (intmax_t)compsize, (intmax_t)(msize - ssize)); 196 } 197 198 md.md_no = i - 1; 199 md.md_provsize = msize; 200 if (!hardcode) 201 bzero(md.md_provider, sizeof(md.md_provider)); 202 else { 203 if (strncmp(name, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 204 name += sizeof(_PATH_DEV) - 1; 205 strlcpy(md.md_provider, name, sizeof(md.md_provider)); 206 } 207 stripe_metadata_encode(&md, sector); 208 error = g_metadata_store(name, sector, sizeof(sector)); 209 if (error != 0) { 210 fprintf(stderr, "Can't store metadata on %s: %s.\n", 211 name, strerror(error)); 212 gctl_error(req, "Not fully done."); 213 continue; 214 } 215 if (verbose) 216 printf("Metadata value stored on %s.\n", name); 217 } 218} 219 220static void 221stripe_clear(struct gctl_req *req) 222{ 223 const char *name; 224 int error, i, nargs; 225 226 nargs = gctl_get_int(req, "nargs"); 227 if (nargs < 1) { 228 gctl_error(req, "Too few arguments."); 229 return; 230 } 231 232 for (i = 0; i < nargs; i++) { 233 name = gctl_get_ascii(req, "arg%d", i); 234 error = g_metadata_clear(name, G_STRIPE_MAGIC); 235 if (error != 0) { 236 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 237 name, strerror(error)); 238 gctl_error(req, "Not fully done."); 239 continue; 240 } 241 if (verbose) 242 printf("Metadata cleared on %s.\n", name); 243 } 244} 245 246static void 247stripe_metadata_dump(const struct g_stripe_metadata *md) 248{ 249 250 printf(" Magic string: %s\n", md->md_magic); 251 printf(" Metadata version: %u\n", (u_int)md->md_version); 252 printf(" Device name: %s\n", md->md_name); 253 printf(" Device ID: %u\n", (u_int)md->md_id); 254 printf(" Disk number: %u\n", (u_int)md->md_no); 255 printf("Total number of disks: %u\n", (u_int)md->md_all); 256 printf(" Stripe size: %u\n", (u_int)md->md_stripesize); 257 printf(" Hardcoded provider: %s\n", md->md_provider); 258} 259 260static void 261stripe_dump(struct gctl_req *req) 262{ 263 struct g_stripe_metadata md, tmpmd; 264 const char *name; 265 int error, i, nargs; 266 267 nargs = gctl_get_int(req, "nargs"); 268 if (nargs < 1) { 269 gctl_error(req, "Too few arguments."); 270 return; 271 } 272 273 for (i = 0; i < nargs; i++) { 274 name = gctl_get_ascii(req, "arg%d", i); 275 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 276 G_STRIPE_MAGIC); 277 if (error != 0) { 278 fprintf(stderr, "Can't read metadata from %s: %s.\n", 279 name, strerror(error)); 280 gctl_error(req, "Not fully done."); 281 continue; 282 } 283 stripe_metadata_decode((u_char *)&tmpmd, &md); 284 printf("Metadata on %s:\n", name); 285 stripe_metadata_dump(&md); 286 printf("\n"); 287 } 288} 289