1 #include "qemu/osdep.h" 2 #include "qemu-common.h" 3 #include "qemu/error-report.h" 4 #include "qemu/option.h" 5 #include "qemu/config-file.h" 6 #include "qmp-commands.h" 7 8 static QemuOptsList *vm_config_groups[48]; 9 static QemuOptsList *drive_config_groups[5]; 10 11 static QemuOptsList *find_list(QemuOptsList **lists, const char *group, 12 Error **errp) 13 { 14 int i; 15 16 for (i = 0; lists[i] != NULL; i++) { 17 if (strcmp(lists[i]->name, group) == 0) 18 break; 19 } 20 if (lists[i] == NULL) { 21 error_setg(errp, "There is no option group '%s'", group); 22 } 23 return lists[i]; 24 } 25 26 QemuOptsList *qemu_find_opts(const char *group) 27 { 28 QemuOptsList *ret; 29 Error *local_err = NULL; 30 31 ret = find_list(vm_config_groups, group, &local_err); 32 if (local_err) { 33 error_report_err(local_err); 34 } 35 36 return ret; 37 } 38 39 QemuOpts *qemu_find_opts_singleton(const char *group) 40 { 41 QemuOptsList *list; 42 QemuOpts *opts; 43 44 list = qemu_find_opts(group); 45 assert(list); 46 opts = qemu_opts_find(list, NULL); 47 if (!opts) { 48 opts = qemu_opts_create(list, NULL, 0, &error_abort); 49 } 50 return opts; 51 } 52 53 static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc) 54 { 55 CommandLineParameterInfoList *param_list = NULL, *entry; 56 CommandLineParameterInfo *info; 57 int i; 58 59 for (i = 0; desc[i].name != NULL; i++) { 60 info = g_malloc0(sizeof(*info)); 61 info->name = g_strdup(desc[i].name); 62 63 switch (desc[i].type) { 64 case QEMU_OPT_STRING: 65 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING; 66 break; 67 case QEMU_OPT_BOOL: 68 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN; 69 break; 70 case QEMU_OPT_NUMBER: 71 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER; 72 break; 73 case QEMU_OPT_SIZE: 74 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE; 75 break; 76 } 77 78 if (desc[i].help) { 79 info->has_help = true; 80 info->help = g_strdup(desc[i].help); 81 } 82 if (desc[i].def_value_str) { 83 info->has_q_default = true; 84 info->q_default = g_strdup(desc[i].def_value_str); 85 } 86 87 entry = g_malloc0(sizeof(*entry)); 88 entry->value = info; 89 entry->next = param_list; 90 param_list = entry; 91 } 92 93 return param_list; 94 } 95 96 /* remove repeated entry from the info list */ 97 static void cleanup_infolist(CommandLineParameterInfoList *head) 98 { 99 CommandLineParameterInfoList *pre_entry, *cur, *del_entry; 100 101 cur = head; 102 while (cur->next) { 103 pre_entry = head; 104 while (pre_entry != cur->next) { 105 if (!strcmp(pre_entry->value->name, cur->next->value->name)) { 106 del_entry = cur->next; 107 cur->next = cur->next->next; 108 g_free(del_entry); 109 break; 110 } 111 pre_entry = pre_entry->next; 112 } 113 cur = cur->next; 114 } 115 } 116 117 /* merge the description items of two parameter infolists */ 118 static void connect_infolist(CommandLineParameterInfoList *head, 119 CommandLineParameterInfoList *new) 120 { 121 CommandLineParameterInfoList *cur; 122 123 cur = head; 124 while (cur->next) { 125 cur = cur->next; 126 } 127 cur->next = new; 128 } 129 130 /* access all the local QemuOptsLists for drive option */ 131 static CommandLineParameterInfoList *get_drive_infolist(void) 132 { 133 CommandLineParameterInfoList *head = NULL, *cur; 134 int i; 135 136 for (i = 0; drive_config_groups[i] != NULL; i++) { 137 if (!head) { 138 head = query_option_descs(drive_config_groups[i]->desc); 139 } else { 140 cur = query_option_descs(drive_config_groups[i]->desc); 141 connect_infolist(head, cur); 142 } 143 } 144 cleanup_infolist(head); 145 146 return head; 147 } 148 149 /* restore machine options that are now machine's properties */ 150 static QemuOptsList machine_opts = { 151 .merge_lists = true, 152 .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head), 153 .desc = { 154 { 155 .name = "type", 156 .type = QEMU_OPT_STRING, 157 .help = "emulated machine" 158 },{ 159 .name = "accel", 160 .type = QEMU_OPT_STRING, 161 .help = "accelerator list", 162 },{ 163 .name = "kernel_irqchip", 164 .type = QEMU_OPT_BOOL, 165 .help = "use KVM in-kernel irqchip", 166 },{ 167 .name = "kvm_shadow_mem", 168 .type = QEMU_OPT_SIZE, 169 .help = "KVM shadow MMU size", 170 },{ 171 .name = "kernel", 172 .type = QEMU_OPT_STRING, 173 .help = "Linux kernel image file", 174 },{ 175 .name = "initrd", 176 .type = QEMU_OPT_STRING, 177 .help = "Linux initial ramdisk file", 178 },{ 179 .name = "append", 180 .type = QEMU_OPT_STRING, 181 .help = "Linux kernel command line", 182 },{ 183 .name = "dtb", 184 .type = QEMU_OPT_STRING, 185 .help = "Linux kernel device tree file", 186 },{ 187 .name = "dumpdtb", 188 .type = QEMU_OPT_STRING, 189 .help = "Dump current dtb to a file and quit", 190 },{ 191 .name = "phandle_start", 192 .type = QEMU_OPT_NUMBER, 193 .help = "The first phandle ID we may generate dynamically", 194 },{ 195 .name = "dt_compatible", 196 .type = QEMU_OPT_STRING, 197 .help = "Overrides the \"compatible\" property of the dt root node", 198 },{ 199 .name = "dump-guest-core", 200 .type = QEMU_OPT_BOOL, 201 .help = "Include guest memory in a core dump", 202 },{ 203 .name = "mem-merge", 204 .type = QEMU_OPT_BOOL, 205 .help = "enable/disable memory merge support", 206 },{ 207 .name = "usb", 208 .type = QEMU_OPT_BOOL, 209 .help = "Set on/off to enable/disable usb", 210 },{ 211 .name = "firmware", 212 .type = QEMU_OPT_STRING, 213 .help = "firmware image", 214 },{ 215 .name = "iommu", 216 .type = QEMU_OPT_BOOL, 217 .help = "Set on/off to enable/disable Intel IOMMU (VT-d)", 218 },{ 219 .name = "suppress-vmdesc", 220 .type = QEMU_OPT_BOOL, 221 .help = "Set on to disable self-describing migration", 222 },{ 223 .name = "aes-key-wrap", 224 .type = QEMU_OPT_BOOL, 225 .help = "enable/disable AES key wrapping using the CPACF wrapping key", 226 },{ 227 .name = "dea-key-wrap", 228 .type = QEMU_OPT_BOOL, 229 .help = "enable/disable DEA key wrapping using the CPACF wrapping key", 230 }, 231 { /* End of list */ } 232 } 233 }; 234 235 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option, 236 const char *option, 237 Error **errp) 238 { 239 CommandLineOptionInfoList *conf_list = NULL, *entry; 240 CommandLineOptionInfo *info; 241 int i; 242 243 for (i = 0; vm_config_groups[i] != NULL; i++) { 244 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) { 245 info = g_malloc0(sizeof(*info)); 246 info->option = g_strdup(vm_config_groups[i]->name); 247 if (!strcmp("drive", vm_config_groups[i]->name)) { 248 info->parameters = get_drive_infolist(); 249 } else if (!strcmp("machine", vm_config_groups[i]->name)) { 250 info->parameters = query_option_descs(machine_opts.desc); 251 } else { 252 info->parameters = 253 query_option_descs(vm_config_groups[i]->desc); 254 } 255 entry = g_malloc0(sizeof(*entry)); 256 entry->value = info; 257 entry->next = conf_list; 258 conf_list = entry; 259 } 260 } 261 262 if (conf_list == NULL) { 263 error_setg(errp, "invalid option name: %s", option); 264 } 265 266 return conf_list; 267 } 268 269 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp) 270 { 271 return find_list(vm_config_groups, group, errp); 272 } 273 274 void qemu_add_drive_opts(QemuOptsList *list) 275 { 276 int entries, i; 277 278 entries = ARRAY_SIZE(drive_config_groups); 279 entries--; /* keep list NULL terminated */ 280 for (i = 0; i < entries; i++) { 281 if (drive_config_groups[i] == NULL) { 282 drive_config_groups[i] = list; 283 return; 284 } 285 } 286 fprintf(stderr, "ran out of space in drive_config_groups"); 287 abort(); 288 } 289 290 void qemu_add_opts(QemuOptsList *list) 291 { 292 int entries, i; 293 294 entries = ARRAY_SIZE(vm_config_groups); 295 entries--; /* keep list NULL terminated */ 296 for (i = 0; i < entries; i++) { 297 if (vm_config_groups[i] == NULL) { 298 vm_config_groups[i] = list; 299 return; 300 } 301 } 302 fprintf(stderr, "ran out of space in vm_config_groups"); 303 abort(); 304 } 305 306 int qemu_set_option(const char *str) 307 { 308 Error *local_err = NULL; 309 char group[64], id[64], arg[64]; 310 QemuOptsList *list; 311 QemuOpts *opts; 312 int rc, offset; 313 314 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset); 315 if (rc < 3 || str[offset] != '=') { 316 error_report("can't parse: \"%s\"", str); 317 return -1; 318 } 319 320 list = qemu_find_opts(group); 321 if (list == NULL) { 322 return -1; 323 } 324 325 opts = qemu_opts_find(list, id); 326 if (!opts) { 327 error_report("there is no %s \"%s\" defined", 328 list->name, id); 329 return -1; 330 } 331 332 qemu_opt_set(opts, arg, str + offset + 1, &local_err); 333 if (local_err) { 334 error_report_err(local_err); 335 return -1; 336 } 337 return 0; 338 } 339 340 struct ConfigWriteData { 341 QemuOptsList *list; 342 FILE *fp; 343 }; 344 345 static int config_write_opt(void *opaque, const char *name, const char *value, 346 Error **errp) 347 { 348 struct ConfigWriteData *data = opaque; 349 350 fprintf(data->fp, " %s = \"%s\"\n", name, value); 351 return 0; 352 } 353 354 static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp) 355 { 356 struct ConfigWriteData *data = opaque; 357 const char *id = qemu_opts_id(opts); 358 359 if (id) { 360 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id); 361 } else { 362 fprintf(data->fp, "[%s]\n", data->list->name); 363 } 364 qemu_opt_foreach(opts, config_write_opt, data, NULL); 365 fprintf(data->fp, "\n"); 366 return 0; 367 } 368 369 void qemu_config_write(FILE *fp) 370 { 371 struct ConfigWriteData data = { .fp = fp }; 372 QemuOptsList **lists = vm_config_groups; 373 int i; 374 375 fprintf(fp, "# qemu config file\n\n"); 376 for (i = 0; lists[i] != NULL; i++) { 377 data.list = lists[i]; 378 qemu_opts_foreach(data.list, config_write_opts, &data, NULL); 379 } 380 } 381 382 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) 383 { 384 char line[1024], group[64], id[64], arg[64], value[1024]; 385 Location loc; 386 QemuOptsList *list = NULL; 387 Error *local_err = NULL; 388 QemuOpts *opts = NULL; 389 int res = -1, lno = 0; 390 391 loc_push_none(&loc); 392 while (fgets(line, sizeof(line), fp) != NULL) { 393 loc_set_file(fname, ++lno); 394 if (line[0] == '\n') { 395 /* skip empty lines */ 396 continue; 397 } 398 if (line[0] == '#') { 399 /* comment */ 400 continue; 401 } 402 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) { 403 /* group with id */ 404 list = find_list(lists, group, &local_err); 405 if (local_err) { 406 error_report_err(local_err); 407 goto out; 408 } 409 opts = qemu_opts_create(list, id, 1, NULL); 410 continue; 411 } 412 if (sscanf(line, "[%63[^]]]", group) == 1) { 413 /* group without id */ 414 list = find_list(lists, group, &local_err); 415 if (local_err) { 416 error_report_err(local_err); 417 goto out; 418 } 419 opts = qemu_opts_create(list, NULL, 0, &error_abort); 420 continue; 421 } 422 value[0] = '\0'; 423 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 || 424 sscanf(line, " %63s = \"\"", arg) == 1) { 425 /* arg = value */ 426 if (opts == NULL) { 427 error_report("no group defined"); 428 goto out; 429 } 430 qemu_opt_set(opts, arg, value, &local_err); 431 if (local_err) { 432 error_report_err(local_err); 433 goto out; 434 } 435 continue; 436 } 437 error_report("parse error"); 438 goto out; 439 } 440 if (ferror(fp)) { 441 error_report("error reading file"); 442 goto out; 443 } 444 res = 0; 445 out: 446 loc_pop(&loc); 447 return res; 448 } 449 450 int qemu_read_config_file(const char *filename) 451 { 452 FILE *f = fopen(filename, "r"); 453 int ret; 454 455 if (f == NULL) { 456 return -errno; 457 } 458 459 ret = qemu_config_parse(f, vm_config_groups, filename); 460 fclose(f); 461 462 if (ret == 0) { 463 return 0; 464 } else { 465 return -EINVAL; 466 } 467 } 468 469 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts, 470 Error **errp) 471 { 472 QemuOpts *subopts; 473 QDict *subqdict; 474 QList *list = NULL; 475 Error *local_err = NULL; 476 size_t orig_size, enum_size; 477 char *prefix; 478 479 prefix = g_strdup_printf("%s.", opts->name); 480 qdict_extract_subqdict(options, &subqdict, prefix); 481 g_free(prefix); 482 orig_size = qdict_size(subqdict); 483 if (!orig_size) { 484 goto out; 485 } 486 487 subopts = qemu_opts_create(opts, NULL, 0, &local_err); 488 if (local_err) { 489 error_propagate(errp, local_err); 490 goto out; 491 } 492 493 qemu_opts_absorb_qdict(subopts, subqdict, &local_err); 494 if (local_err) { 495 error_propagate(errp, local_err); 496 goto out; 497 } 498 499 enum_size = qdict_size(subqdict); 500 if (enum_size < orig_size && enum_size) { 501 error_setg(errp, "Unknown option '%s' for [%s]", 502 qdict_first(subqdict)->key, opts->name); 503 goto out; 504 } 505 506 if (enum_size) { 507 /* Multiple, enumerated sections */ 508 QListEntry *list_entry; 509 unsigned i = 0; 510 511 /* Not required anymore */ 512 qemu_opts_del(subopts); 513 514 qdict_array_split(subqdict, &list); 515 if (qdict_size(subqdict)) { 516 error_setg(errp, "Unused option '%s' for [%s]", 517 qdict_first(subqdict)->key, opts->name); 518 goto out; 519 } 520 521 QLIST_FOREACH_ENTRY(list, list_entry) { 522 QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry)); 523 char *opt_name; 524 525 if (!section) { 526 error_setg(errp, "[%s] section (index %u) does not consist of " 527 "keys", opts->name, i); 528 goto out; 529 } 530 531 opt_name = g_strdup_printf("%s.%u", opts->name, i++); 532 subopts = qemu_opts_create(opts, opt_name, 1, &local_err); 533 g_free(opt_name); 534 if (local_err) { 535 error_propagate(errp, local_err); 536 goto out; 537 } 538 539 qemu_opts_absorb_qdict(subopts, section, &local_err); 540 if (local_err) { 541 error_propagate(errp, local_err); 542 qemu_opts_del(subopts); 543 goto out; 544 } 545 546 if (qdict_size(section)) { 547 error_setg(errp, "[%s] section doesn't support the option '%s'", 548 opts->name, qdict_first(section)->key); 549 qemu_opts_del(subopts); 550 goto out; 551 } 552 } 553 } 554 555 out: 556 QDECREF(subqdict); 557 QDECREF(list); 558 } 559 560 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists, 561 Error **errp) 562 { 563 int i; 564 Error *local_err = NULL; 565 566 for (i = 0; lists[i]; i++) { 567 config_parse_qdict_section(options, lists[i], &local_err); 568 if (local_err) { 569 error_propagate(errp, local_err); 570 return; 571 } 572 } 573 } 574