geom_shsec.c revision 140074
1/*- 2 * Copyright (c) 2004 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/shsec/geom_shsec.c 140074 2005-01-11 18:06:44Z 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/shsec/g_shsec.h> 41 42#include "core/geom.h" 43#include "misc/subr.h" 44 45 46uint32_t lib_version = G_LIB_VERSION; 47uint32_t version = G_SHSEC_VERSION; 48 49static void shsec_main(struct gctl_req *req, unsigned flags); 50static void shsec_clear(struct gctl_req *req); 51static void shsec_dump(struct gctl_req *req); 52static void shsec_label(struct gctl_req *req); 53 54struct g_command class_commands[] = { 55 { "clear", G_FLAG_VERBOSE, shsec_main, G_NULL_OPTS }, 56 { "dump", 0, shsec_main, G_NULL_OPTS }, 57 { "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, shsec_main, 58 { 59 { 'h', "hardcode", NULL, G_TYPE_NONE }, 60 G_OPT_SENTINEL 61 } 62 }, 63 { "stop", G_FLAG_VERBOSE, NULL, 64 { 65 { 'f', "force", NULL, G_TYPE_NONE }, 66 G_OPT_SENTINEL 67 } 68 }, 69 G_CMD_SENTINEL 70}; 71 72static int verbose = 0; 73 74void usage(const char *name); 75void 76usage(const char *name) 77{ 78 79 fprintf(stderr, "usage: %s label [-hv] <name> <prov> <prov> [prov [...]]\n", name); 80 fprintf(stderr, " %s stop [-fv] <name> [name [...]]\n", name); 81 fprintf(stderr, " %s clear [-v] <prov> [prov [...]]\n", name); 82 fprintf(stderr, " %s dump <prov> [prov [...]]\n", name); 83} 84 85static void 86shsec_main(struct gctl_req *req, unsigned flags) 87{ 88 const char *name; 89 90 if ((flags & G_FLAG_VERBOSE) != 0) 91 verbose = 1; 92 93 name = gctl_get_asciiparam(req, "verb"); 94 if (name == NULL) { 95 gctl_error(req, "No '%s' argument.", "verb"); 96 return; 97 } 98 if (strcmp(name, "label") == 0) 99 shsec_label(req); 100 else if (strcmp(name, "clear") == 0) 101 shsec_clear(req); 102 else if (strcmp(name, "dump") == 0) 103 shsec_dump(req); 104 else 105 gctl_error(req, "Unknown command: %s.", name); 106} 107 108static void 109shsec_label(struct gctl_req *req) 110{ 111 struct g_shsec_metadata md; 112 off_t compsize, msize; 113 u_char sector[512]; 114 unsigned i, ssize, secsize; 115 const char *name; 116 char param[16]; 117 int *hardcode, *nargs, error; 118 119 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 120 if (nargs == NULL) { 121 gctl_error(req, "No '%s' argument.", "nargs"); 122 return; 123 } 124 if (*nargs <= 2) { 125 gctl_error(req, "Too few arguments."); 126 return; 127 } 128 hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode)); 129 if (hardcode == NULL) { 130 gctl_error(req, "No '%s' argument.", "hardcode"); 131 return; 132 } 133 134 /* 135 * Clear last sector first to spoil all components if device exists. 136 */ 137 compsize = 0; 138 secsize = 0; 139 for (i = 1; i < (unsigned)*nargs; i++) { 140 snprintf(param, sizeof(param), "arg%u", i); 141 name = gctl_get_asciiparam(req, param); 142 143 msize = g_get_mediasize(name); 144 ssize = g_get_sectorsize(name); 145 if (msize == 0 || ssize == 0) { 146 gctl_error(req, "Can't get informations about %s: %s.", 147 name, strerror(errno)); 148 return; 149 } 150 msize -= ssize; 151 if (compsize == 0 || (compsize > 0 && msize < compsize)) 152 compsize = msize; 153 if (secsize == 0) 154 secsize = ssize; 155 else 156 secsize = g_lcm(secsize, ssize); 157 158 error = g_metadata_clear(name, NULL); 159 if (error != 0) { 160 gctl_error(req, "Can't store metadata on %s: %s.", name, 161 strerror(error)); 162 return; 163 } 164 } 165 166 strlcpy(md.md_magic, G_SHSEC_MAGIC, sizeof(md.md_magic)); 167 md.md_version = G_SHSEC_VERSION; 168 name = gctl_get_asciiparam(req, "arg0"); 169 if (name == NULL) { 170 gctl_error(req, "No 'arg%u' argument.", 0); 171 return; 172 } 173 strlcpy(md.md_name, name, sizeof(md.md_name)); 174 md.md_id = arc4random(); 175 md.md_all = *nargs - 1; 176 177 /* 178 * Ok, store metadata. 179 */ 180 for (i = 1; i < (unsigned)*nargs; i++) { 181 snprintf(param, sizeof(param), "arg%u", i); 182 name = gctl_get_asciiparam(req, param); 183 184 msize = g_get_mediasize(name) - g_get_sectorsize(name); 185 if (compsize < msize) { 186 fprintf(stderr, 187 "warning: %s: only %jd bytes from %jd bytes used.\n", 188 name, (intmax_t)compsize, (intmax_t)msize); 189 } 190 191 md.md_no = i - 1; 192 if (!*hardcode) 193 bzero(md.md_provider, sizeof(md.md_provider)); 194 else { 195 if (strncmp(name, _PATH_DEV, strlen(_PATH_DEV)) == 0) 196 name += strlen(_PATH_DEV); 197 strlcpy(md.md_provider, name, sizeof(md.md_provider)); 198 } 199 shsec_metadata_encode(&md, sector); 200 error = g_metadata_store(name, sector, sizeof(sector)); 201 if (error != 0) { 202 fprintf(stderr, "Can't store metadata on %s: %s.\n", 203 name, strerror(error)); 204 gctl_error(req, "Not fully done."); 205 continue; 206 } 207 if (verbose) 208 printf("Metadata value stored on %s.\n", name); 209 } 210} 211 212static void 213shsec_clear(struct gctl_req *req) 214{ 215 const char *name; 216 char param[16]; 217 unsigned i; 218 int *nargs, error; 219 220 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 221 if (nargs == NULL) { 222 gctl_error(req, "No '%s' argument.", "nargs"); 223 return; 224 } 225 if (*nargs < 1) { 226 gctl_error(req, "Too few arguments."); 227 return; 228 } 229 230 for (i = 0; i < (unsigned)*nargs; i++) { 231 snprintf(param, sizeof(param), "arg%u", i); 232 name = gctl_get_asciiparam(req, param); 233 234 error = g_metadata_clear(name, G_SHSEC_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 247shsec_metadata_dump(const struct g_shsec_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(" Hardcoded provider: %s\n", md->md_provider); 257} 258 259static void 260shsec_dump(struct gctl_req *req) 261{ 262 struct g_shsec_metadata md, tmpmd; 263 const char *name; 264 char param[16]; 265 int *nargs, error, i; 266 267 nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 268 if (nargs == NULL) { 269 gctl_error(req, "No '%s' argument.", "nargs"); 270 return; 271 } 272 if (*nargs < 1) { 273 gctl_error(req, "Too few arguments."); 274 return; 275 } 276 277 for (i = 0; i < *nargs; i++) { 278 snprintf(param, sizeof(param), "arg%u", i); 279 name = gctl_get_asciiparam(req, param); 280 281 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 282 G_SHSEC_MAGIC); 283 if (error != 0) { 284 fprintf(stderr, "Can't read metadata from %s: %s.\n", 285 name, strerror(error)); 286 gctl_error(req, "Not fully done."); 287 continue; 288 } 289 shsec_metadata_decode((u_char *)&tmpmd, &md); 290 printf("Metadata on %s:\n", name); 291 shsec_metadata_dump(&md); 292 printf("\n"); 293 } 294} 295