geom_concat.c revision 330737
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: stable/10/sbin/geom/class/concat/geom_concat.c 330737 2018-03-10 04:17:01Z asomers $"); 29 30#include <sys/param.h> 31#include <errno.h> 32#include <paths.h> 33#include <stdio.h> 34#include <stdlib.h> 35#include <string.h> 36#include <strings.h> 37#include <assert.h> 38#include <libgeom.h> 39#include <geom/concat/g_concat.h> 40 41#include "core/geom.h" 42#include "misc/subr.h" 43 44 45uint32_t lib_version = G_LIB_VERSION; 46uint32_t version = G_CONCAT_VERSION; 47 48static void concat_main(struct gctl_req *req, unsigned flags); 49static void concat_clear(struct gctl_req *req); 50static void concat_dump(struct gctl_req *req); 51static void concat_label(struct gctl_req *req); 52 53struct g_command class_commands[] = { 54 { "clear", G_FLAG_VERBOSE, concat_main, G_NULL_OPTS, 55 "[-v] prov ..." 56 }, 57 { "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, G_NULL_OPTS, 58 "[-v] name prov ..." 59 }, 60 { "destroy", G_FLAG_VERBOSE, NULL, 61 { 62 { 'f', "force", NULL, G_TYPE_BOOL }, 63 G_OPT_SENTINEL 64 }, 65 "[-fv] name ..." 66 }, 67 { "dump", 0, concat_main, G_NULL_OPTS, 68 "prov ..." 69 }, 70 { "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, concat_main, 71 { 72 { 'h', "hardcode", NULL, G_TYPE_BOOL }, 73 G_OPT_SENTINEL 74 }, 75 "[-hv] name prov ..." 76 }, 77 { "stop", G_FLAG_VERBOSE, NULL, 78 { 79 { 'f', "force", NULL, G_TYPE_BOOL }, 80 G_OPT_SENTINEL 81 }, 82 "[-fv] name ..." 83 }, 84 G_CMD_SENTINEL 85}; 86 87static int verbose = 0; 88 89static void 90concat_main(struct gctl_req *req, unsigned flags) 91{ 92 const char *name; 93 94 if ((flags & G_FLAG_VERBOSE) != 0) 95 verbose = 1; 96 97 name = gctl_get_ascii(req, "verb"); 98 if (name == NULL) { 99 gctl_error(req, "No '%s' argument.", "verb"); 100 return; 101 } 102 if (strcmp(name, "label") == 0) 103 concat_label(req); 104 else if (strcmp(name, "clear") == 0) 105 concat_clear(req); 106 else if (strcmp(name, "dump") == 0) 107 concat_dump(req); 108 else 109 gctl_error(req, "Unknown command: %s.", name); 110} 111 112static void 113concat_label(struct gctl_req *req) 114{ 115 struct g_concat_metadata md; 116 u_char sector[512]; 117 const char *name; 118 int error, i, hardcode, nargs; 119 120 bzero(sector, sizeof(sector)); 121 nargs = gctl_get_int(req, "nargs"); 122 if (nargs < 2) { 123 gctl_error(req, "Too few arguments."); 124 return; 125 } 126 hardcode = gctl_get_int(req, "hardcode"); 127 128 /* 129 * Clear last sector first to spoil all components if device exists. 130 */ 131 for (i = 1; i < nargs; i++) { 132 name = gctl_get_ascii(req, "arg%d", i); 133 error = g_metadata_clear(name, NULL); 134 if (error != 0) { 135 gctl_error(req, "Can't store metadata on %s: %s.", name, 136 strerror(error)); 137 return; 138 } 139 } 140 141 strlcpy(md.md_magic, G_CONCAT_MAGIC, sizeof(md.md_magic)); 142 md.md_version = G_CONCAT_VERSION; 143 name = gctl_get_ascii(req, "arg0"); 144 strlcpy(md.md_name, name, sizeof(md.md_name)); 145 md.md_id = arc4random(); 146 md.md_all = nargs - 1; 147 148 /* 149 * Ok, store metadata. 150 */ 151 for (i = 1; i < nargs; i++) { 152 name = gctl_get_ascii(req, "arg%d", i); 153 md.md_no = i - 1; 154 if (!hardcode) 155 bzero(md.md_provider, sizeof(md.md_provider)); 156 else { 157 if (strncmp(name, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0) 158 name += sizeof(_PATH_DEV) - 1; 159 strlcpy(md.md_provider, name, sizeof(md.md_provider)); 160 } 161 md.md_provsize = g_get_mediasize(name); 162 if (md.md_provsize == 0) { 163 fprintf(stderr, "Can't get mediasize of %s: %s.\n", 164 name, strerror(errno)); 165 gctl_error(req, "Not fully done."); 166 continue; 167 } 168 concat_metadata_encode(&md, sector); 169 error = g_metadata_store(name, sector, sizeof(sector)); 170 if (error != 0) { 171 fprintf(stderr, "Can't store metadata on %s: %s.\n", 172 name, strerror(error)); 173 gctl_error(req, "Not fully done."); 174 continue; 175 } 176 if (verbose) 177 printf("Metadata value stored on %s.\n", name); 178 } 179} 180 181static void 182concat_clear(struct gctl_req *req) 183{ 184 const char *name; 185 int error, i, nargs; 186 187 nargs = gctl_get_int(req, "nargs"); 188 if (nargs < 1) { 189 gctl_error(req, "Too few arguments."); 190 return; 191 } 192 193 for (i = 0; i < nargs; i++) { 194 name = gctl_get_ascii(req, "arg%d", i); 195 error = g_metadata_clear(name, G_CONCAT_MAGIC); 196 if (error != 0) { 197 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 198 name, strerror(error)); 199 gctl_error(req, "Not fully done."); 200 continue; 201 } 202 if (verbose) 203 printf("Metadata cleared on %s.\n", name); 204 } 205} 206 207static void 208concat_metadata_dump(const struct g_concat_metadata *md) 209{ 210 211 printf(" Magic string: %s\n", md->md_magic); 212 printf(" Metadata version: %u\n", (u_int)md->md_version); 213 printf(" Device name: %s\n", md->md_name); 214 printf(" Device ID: %u\n", (u_int)md->md_id); 215 printf(" Disk number: %u\n", (u_int)md->md_no); 216 printf("Total number of disks: %u\n", (u_int)md->md_all); 217 printf(" Hardcoded provider: %s\n", md->md_provider); 218} 219 220static void 221concat_dump(struct gctl_req *req) 222{ 223 struct g_concat_metadata md, tmpmd; 224 const char *name; 225 int error, i, nargs; 226 227 nargs = gctl_get_int(req, "nargs"); 228 if (nargs < 1) { 229 gctl_error(req, "Too few arguments."); 230 return; 231 } 232 233 for (i = 0; i < nargs; i++) { 234 name = gctl_get_ascii(req, "arg%d", i); 235 error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 236 G_CONCAT_MAGIC); 237 if (error != 0) { 238 fprintf(stderr, "Can't read metadata from %s: %s.\n", 239 name, strerror(error)); 240 gctl_error(req, "Not fully done."); 241 continue; 242 } 243 concat_metadata_decode((u_char *)&tmpmd, &md); 244 printf("Metadata on %s:\n", name); 245 concat_metadata_dump(&md); 246 printf("\n"); 247 } 248} 249