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/param.h> 30 #include <errno.h> 31 #include <paths.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <stdint.h> 35 #include <string.h> 36 #include <strings.h> 37 #include <assert.h> 38 #include <libgeom.h> 39 #include <unistd.h> 40 #include <uuid.h> 41 #include <geom/multipath/g_multipath.h> 42 43 #include "core/geom.h" 44 #include "misc/subr.h" 45 46 uint32_t lib_version = G_LIB_VERSION; 47 uint32_t version = G_MULTIPATH_VERSION; 48 49 static void mp_main(struct gctl_req *, unsigned int); 50 static void mp_label(struct gctl_req *); 51 static void mp_clear(struct gctl_req *); 52 static void mp_prefer(struct gctl_req *); 53 54 struct g_command class_commands[] = { 55 { 56 "create", G_FLAG_VERBOSE | G_FLAG_LOADKLD, NULL, 57 { 58 { 'A', "active_active", NULL, G_TYPE_BOOL }, 59 { 'R', "active_read", NULL, G_TYPE_BOOL }, 60 G_OPT_SENTINEL 61 }, 62 "[-vAR] name prov ..." 63 }, 64 { 65 "label", G_FLAG_VERBOSE | G_FLAG_LOADKLD, mp_main, 66 { 67 { 'A', "active_active", NULL, G_TYPE_BOOL }, 68 { 'R', "active_read", NULL, G_TYPE_BOOL }, 69 G_OPT_SENTINEL 70 }, 71 "[-vAR] name prov ..." 72 }, 73 { "configure", G_FLAG_VERBOSE, NULL, 74 { 75 { 'A', "active_active", NULL, G_TYPE_BOOL }, 76 { 'P', "active_passive", NULL, G_TYPE_BOOL }, 77 { 'R', "active_read", NULL, G_TYPE_BOOL }, 78 G_OPT_SENTINEL 79 }, 80 "[-vAPR] name" 81 }, 82 { 83 "add", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 84 "[-v] name prov" 85 }, 86 { 87 "remove", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 88 "[-v] name prov" 89 }, 90 { 91 "prefer", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS, 92 "[-v] prov ..." 93 }, 94 { 95 "fail", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 96 "[-v] name prov" 97 }, 98 { 99 "restore", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 100 "[-v] name prov" 101 }, 102 { 103 "rotate", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 104 "[-v] name" 105 }, 106 { 107 "getactive", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 108 "[-v] name" 109 }, 110 { 111 "destroy", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 112 "[-v] name" 113 }, 114 { 115 "stop", G_FLAG_VERBOSE, NULL, G_NULL_OPTS, 116 "[-v] name" 117 }, 118 { 119 "clear", G_FLAG_VERBOSE, mp_main, G_NULL_OPTS, 120 "[-v] prov ..." 121 }, 122 G_CMD_SENTINEL 123 }; 124 125 static void 126 mp_main(struct gctl_req *req, unsigned int flags __unused) 127 { 128 const char *name; 129 130 name = gctl_get_ascii(req, "verb"); 131 if (name == NULL) { 132 gctl_error(req, "No '%s' argument.", "verb"); 133 return; 134 } 135 if (strcmp(name, "label") == 0) { 136 mp_label(req); 137 } else if (strcmp(name, "clear") == 0) { 138 mp_clear(req); 139 } else if (strcmp(name, "prefer") == 0) { 140 mp_prefer(req); 141 } else { 142 gctl_error(req, "Unknown command: %s.", name); 143 } 144 } 145 146 static void 147 mp_label(struct gctl_req *req) 148 { 149 struct g_multipath_metadata md; 150 off_t disksize = 0, msize; 151 uint8_t *sector, *rsector; 152 char *ptr; 153 uuid_t uuid; 154 ssize_t secsize = 0, ssize; 155 uint32_t status; 156 const char *name, *name2, *mpname; 157 int error, i, nargs, fd; 158 159 nargs = gctl_get_int(req, "nargs"); 160 if (nargs < 2) { 161 gctl_error(req, "wrong number of arguments."); 162 return; 163 } 164 165 /* 166 * First, check each provider to make sure it's the same size. 167 * This also gets us our size and sectorsize for the metadata. 168 */ 169 for (i = 1; i < nargs; i++) { 170 name = gctl_get_ascii(req, "arg%d", i); 171 msize = g_get_mediasize(name); 172 ssize = g_get_sectorsize(name); 173 if (msize == 0 || ssize == 0) { 174 gctl_error(req, "cannot get information about %s: %s.", 175 name, strerror(errno)); 176 return; 177 } 178 if (i == 1) { 179 secsize = ssize; 180 disksize = msize; 181 } else { 182 if (secsize != ssize) { 183 gctl_error(req, "%s sector size %ju different.", 184 name, (intmax_t)ssize); 185 return; 186 } 187 if (disksize != msize) { 188 gctl_error(req, "%s media size %ju different.", 189 name, (intmax_t)msize); 190 return; 191 } 192 } 193 194 } 195 196 /* 197 * Generate metadata. 198 */ 199 strlcpy(md.md_magic, G_MULTIPATH_MAGIC, sizeof(md.md_magic)); 200 md.md_version = G_MULTIPATH_VERSION; 201 mpname = gctl_get_ascii(req, "arg0"); 202 strlcpy(md.md_name, mpname, sizeof(md.md_name)); 203 md.md_size = disksize; 204 md.md_sectorsize = secsize; 205 uuid_create(&uuid, &status); 206 if (status != uuid_s_ok) { 207 gctl_error(req, "cannot create a UUID."); 208 return; 209 } 210 uuid_to_string(&uuid, &ptr, &status); 211 if (status != uuid_s_ok) { 212 gctl_error(req, "cannot stringify a UUID."); 213 return; 214 } 215 strlcpy(md.md_uuid, ptr, sizeof (md.md_uuid)); 216 md.md_active_active = gctl_get_int(req, "active_active"); 217 if (gctl_get_int(req, "active_read")) 218 md.md_active_active = 2; 219 free(ptr); 220 221 /* 222 * Allocate a sector to write as metadata. 223 */ 224 sector = calloc(1, secsize); 225 if (sector == NULL) { 226 gctl_error(req, "unable to allocate metadata buffer"); 227 return; 228 } 229 rsector = malloc(secsize); 230 if (rsector == NULL) { 231 gctl_error(req, "unable to allocate metadata buffer"); 232 goto done; 233 } 234 235 /* 236 * encode the metadata 237 */ 238 multipath_metadata_encode(&md, sector); 239 240 /* 241 * Store metadata on the initial provider. 242 */ 243 name = gctl_get_ascii(req, "arg1"); 244 error = g_metadata_store(name, sector, secsize); 245 if (error != 0) { 246 gctl_error(req, "cannot store metadata on %s: %s.", name, strerror(error)); 247 goto done; 248 } 249 250 /* 251 * Now touch the rest of the providers to hint retaste. 252 */ 253 for (i = 2; i < nargs; i++) { 254 name2 = gctl_get_ascii(req, "arg%d", i); 255 fd = g_open(name2, 1); 256 if (fd < 0) { 257 fprintf(stderr, "Unable to open %s: %s.\n", 258 name2, strerror(errno)); 259 continue; 260 } 261 if (pread(fd, rsector, secsize, disksize - secsize) != 262 (ssize_t)secsize) { 263 fprintf(stderr, "Unable to read metadata from %s: %s.\n", 264 name2, strerror(errno)); 265 g_close(fd); 266 continue; 267 } 268 g_close(fd); 269 if (memcmp(sector, rsector, secsize)) { 270 fprintf(stderr, "No metadata found on %s." 271 " It is not a path of %s.\n", 272 name2, name); 273 } 274 } 275 done: 276 free(rsector); 277 free(sector); 278 } 279 280 281 static void 282 mp_clear(struct gctl_req *req) 283 { 284 const char *name; 285 int error, i, nargs; 286 287 nargs = gctl_get_int(req, "nargs"); 288 if (nargs < 1) { 289 gctl_error(req, "Too few arguments."); 290 return; 291 } 292 293 for (i = 0; i < nargs; i++) { 294 name = gctl_get_ascii(req, "arg%d", i); 295 error = g_metadata_clear(name, G_MULTIPATH_MAGIC); 296 if (error != 0) { 297 fprintf(stderr, "Can't clear metadata on %s: %s.\n", 298 name, strerror(error)); 299 gctl_error(req, "Not fully done."); 300 continue; 301 } 302 } 303 } 304 305 static void 306 mp_prefer(struct gctl_req *req) 307 { 308 const char *name, *comp, *errstr; 309 int nargs; 310 311 nargs = gctl_get_int(req, "nargs"); 312 if (nargs != 2) { 313 gctl_error(req, "Usage: prefer GEOM PROVIDER"); 314 return; 315 } 316 name = gctl_get_ascii(req, "arg0"); 317 comp = gctl_get_ascii(req, "arg1"); 318 errstr = gctl_issue (req); 319 if (errstr != NULL) { 320 fprintf(stderr, "Can't set %s preferred provider to %s: %s.\n", 321 name, comp, errstr); 322 } 323 } 324