1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 Mathew Jacob <mjacob@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 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 <unistd.h> 41 #include <uuid.h> 42 #include <geom/multipath/g_multipath.h> 43 44 #include "core/geom.h" 45 #include "misc/subr.h" 46 47 uint32_t lib_version = G_LIB_VERSION; 48 uint32_t version = G_MULTIPATH_VERSION; 49 50 static void mp_main(struct gctl_req *, unsigned int); 51 static void mp_label(struct gctl_req *); 52 static void mp_clear(struct gctl_req *); 53 static void mp_prefer(struct gctl_req *); 54 55 struct g_command class_commands[] = { 56 { 57 "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, 58 { 59 { 'A', "active_active", NULL, G_TYPE_BOOL }, 60 { 'R', "active_read", NULL, G_TYPE_BOOL }, 61 G_OPT_SENTINEL 62 }, 63 "[-vAR] name prov ..." 64 }, 65 { 66 "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, mp_main, 67 { 68 { 'A', "active_active", NULL, G_TYPE_BOOL }, 69 { 'R', "active_read", NULL, G_TYPE_BOOL }, 70 G_OPT_SENTINEL 71 }, 72 "[-vAR] name prov ..." 73 }, 74 { "configure", G_FLAG_VERBOSE, NULL, 75 { 76 { 'A', "active_active", NULL, G_TYPE_BOOL }, 77 { 'P', "active_passive", NULL, G_TYPE_BOOL }, 78 { 'R', "active_read", NULL, G_TYPE_BOOL }, 79 G_OPT_SENTINEL 80 }, 81 "[-vAPR] name" 82 }, 83 { 84 "add", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 85 "[-v] name prov" 86 }, 87 { 88 "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 89 "[-v] name prov" 90 }, 91 { 92 "prefer", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS, 93 "[-v] prov ..." 94 }, 95 { 96 "fail", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 97 "[-v] name prov" 98 }, 99 { 100 "restore", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 101 "[-v] name prov" 102 }, 103 { 104 "rotate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 105 "[-v] name" 106 }, 107 { 108 "getactive", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 109 "[-v] name" 110 }, 111 { 112 "destroy", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 113 "[-v] name" 114 }, 115 { 116 "stop", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 117 "[-v] name" 118 }, 119 { 120 "clear", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS, 121 "[-v] prov ..." 122 }, 123 G_CMD_SENTINEL 124 }; 125 126 static void 127 mp_main(struct gctl_req *req, unsigned int flags __unused) 128 { 129 const char *name; 130 131 name = gctl_get_ascii(req, "verb"); 132 if (name == NULL) { 133 gctl_error(req, "No '%s' argument.", "verb"); 134 return; 135 } 136 if (strcmp(name, "label") == 0) { 137 mp_label(req); 138 } else if (strcmp(name, "clear") == 0) { 139 mp_clear(req); 140 } else if (strcmp(name, "prefer") == 0) { 141 mp_prefer(req); 142 } else { 143 gctl_error(req, "Unknown command: %s.", name); 144 } 145 } 146 147 static void 148 mp_label(struct gctl_req *req) 149 { 150 struct g_multipath_metadata md; 151 off_t disksize = 0, msize; 152 uint8_t *sector, *rsector; 153 char *ptr; 154 uuid_t uuid; 155 ssize_t secsize = 0, ssize; 156 uint32_t status; 157 const char *name, *name2, *mpname; 158 int error, i, nargs, fd; 159 160 nargs = gctl_get_int(req, "nargs"); 161 if (nargs < 2) { 162 gctl_error(req, "wrong number of arguments."); 163 return; 164 } 165 166 /* 167 * First, check each provider to make sure it's the same size. 168 * This also gets us our size and sectorsize for the metadata. 169 */ 170 for (i = 1; i < nargs; i++) { 171 name = gctl_get_ascii(req, "arg%d", i); 172 msize = g_get_mediasize(name); 173 ssize = g_get_sectorsize(name); 174 if (msize == 0 || ssize == 0) { 175 gctl_error(req, "cannot get information about %s: %s.", 176 name, strerror(errno)); 177 return; 178 } 179 if (i == 1) { 180 secsize = ssize; 181 disksize = msize; 182 } else { 183 if (secsize != ssize) { 184 gctl_error(req, "%s sector size %ju different.", 185 name, (intmax_t)ssize); 186 return; 187 } 188 if (disksize != msize) { 189 gctl_error(req, "%s media size %ju different.", 190 name, (intmax_t)msize); 191 return; 192 } 193 } 194 195 } 196 197 /* 198 * Generate metadata. 199 */ 200 strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic)); 201 md.md_version = G_MULTIPATH_VERSION; 202 mpname = gctl_get_ascii(req, "arg0"); 203 strlcpy(md.md_name, mpname, sizeof(md.md_name)); 204 md.md_size = disksize; 205 md.md_sectorsize = secsize; 206 uuid_create(&uuid, &status); 207 if (status != uuid_s_ok) { 208 gctl_error(req, "cannot create a UUID."); 209 return; 210 } 211 uuid_to_string(&uuid, &ptr, &status); 212 if (status != uuid_s_ok) { 213 gctl_error(req, "cannot stringify a UUID."); 214 return; 215 } 216 strlcpy(md.md_uuid, ptr, sizeof (md.md_uuid)); 217 md.md_active_active = gctl_get_int(req, "active_active"); 218 if (gctl_get_int(req, "active_read")) 219 md.md_active_active = 2; 220 free(ptr); 221 222 /* 223 * Allocate a sector to write as metadata. 224 */ 225 sector = calloc(1, secsize); 226 if (sector == NULL) { 227 gctl_error(req, "unable to allocate metadata buffer"); 228 return; 229 } 230 rsector = malloc(secsize); 231 if (rsector == NULL) { 232 gctl_error(req, "unable to allocate metadata buffer"); 233 goto done; 234 } 235 236 /* 237 * encode the metadata 238 */ 239 multipath_metadata_encode(&md, sector); 240 241 /* 242 * Store metadata on the initial provider. 243 */ 244 name = gctl_get_ascii(req, "arg1"); 245 error = g_metadata_store(name, sector, secsize); 246 if (error != 0) { 247 gctl_error(req, "cannot store metadata on %s: %s.", name, strerror(error)); 248 goto done; 249 } 250 251 /* 252 * Now touch the rest of the providers to hint retaste. 253 */ 254 for (i = 2; i < nargs; i++) { 255 name2 = gctl_get_ascii(req, "arg%d", i); 256 fd = g_open(name2, 1); 257 if (fd < 0) { 258 fprintf(stderr, "Unable to open %s: %s.\n", 259 name2, strerror(errno)); 260 continue; 261 } 262 if (pread(fd, rsector, secsize, disksize - secsize) != 263 (ssize_t)secsize) { 264 fprintf(stderr, "Unable to read metadata from %s: %s.\n", 265 name2, strerror(errno)); 266 g_close(fd); 267 continue; 268 } 269 g_close(fd); 270 if (memcmp(sector, rsector, secsize)) { 271 fprintf(stderr, "No metadata found on %s." 272 " It is not a path of %s.\n", 273 name2, name); 274 } 275 } 276 done: 277 free(rsector); 278 free(sector); 279 } 280 281 282 static void 283 mp_clear(struct gctl_req *req) 284 { 285 const char *name; 286 int error, i, nargs; 287 288 nargs = gctl_get_int(req, "nargs"); 289 if (nargs < 1) { 290 gctl_error(req, "Too few arguments."); 291 return; 292 } 293 294 for (i = 0; i < nargs; i++) { 295 name = gctl_get_ascii(req, "arg%d", i); 296 error = g_metadata_clear(name, G_MULTIPATH_MAGIC); 297 if (error != 0) { 298 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 299 name, strerror(error)); 300 gctl_error(req, "Not fully done."); 301 continue; 302 } 303 } 304 } 305 306 static void 307 mp_prefer(struct gctl_req *req) 308 { 309 const char *name, *comp, *errstr; 310 int nargs; 311 312 nargs = gctl_get_int(req, "nargs"); 313 if (nargs != 2) { 314 gctl_error(req, "Usage: prefer GEOM PROVIDER"); 315 return; 316 } 317 name = gctl_get_ascii(req, "arg0"); 318 comp = gctl_get_ascii(req, "arg1"); 319 errstr = gctl_issue (req); 320 if (errstr != NULL) { 321 fprintf(stderr, "Can't set %s preferred provider to %s: %s.\n", 322 name, comp, errstr); 323 } 324 } 325