1 #include "qemu-common.h" 2 #include "qemu/error-report.h" 3 #include "qemu/option.h" 4 #include "qemu/config-file.h" 5 #include "qapi/error.h" 6 #include "qmp-commands.h" 7 8 static QemuOptsList *vm_config_groups[48]; 9 static QemuOptsList *drive_config_groups[4]; 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 { /* End of list */ } 224 } 225 }; 226 227 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option, 228 const char *option, 229 Error **errp) 230 { 231 CommandLineOptionInfoList *conf_list = NULL, *entry; 232 CommandLineOptionInfo *info; 233 int i; 234 235 for (i = 0; vm_config_groups[i] != NULL; i++) { 236 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) { 237 info = g_malloc0(sizeof(*info)); 238 info->option = g_strdup(vm_config_groups[i]->name); 239 if (!strcmp("drive", vm_config_groups[i]->name)) { 240 info->parameters = get_drive_infolist(); 241 } else if (!strcmp("machine", vm_config_groups[i]->name)) { 242 info->parameters = query_option_descs(machine_opts.desc); 243 } else { 244 info->parameters = 245 query_option_descs(vm_config_groups[i]->desc); 246 } 247 entry = g_malloc0(sizeof(*entry)); 248 entry->value = info; 249 entry->next = conf_list; 250 conf_list = entry; 251 } 252 } 253 254 if (conf_list == NULL) { 255 error_setg(errp, "invalid option name: %s", option); 256 } 257 258 return conf_list; 259 } 260 261 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp) 262 { 263 return find_list(vm_config_groups, group, errp); 264 } 265 266 void qemu_add_drive_opts(QemuOptsList *list) 267 { 268 int entries, i; 269 270 entries = ARRAY_SIZE(drive_config_groups); 271 entries--; /* keep list NULL terminated */ 272 for (i = 0; i < entries; i++) { 273 if (drive_config_groups[i] == NULL) { 274 drive_config_groups[i] = list; 275 return; 276 } 277 } 278 fprintf(stderr, "ran out of space in drive_config_groups"); 279 abort(); 280 } 281 282 void qemu_add_opts(QemuOptsList *list) 283 { 284 int entries, i; 285 286 entries = ARRAY_SIZE(vm_config_groups); 287 entries--; /* keep list NULL terminated */ 288 for (i = 0; i < entries; i++) { 289 if (vm_config_groups[i] == NULL) { 290 vm_config_groups[i] = list; 291 return; 292 } 293 } 294 fprintf(stderr, "ran out of space in vm_config_groups"); 295 abort(); 296 } 297 298 int qemu_set_option(const char *str) 299 { 300 Error *local_err = NULL; 301 char group[64], id[64], arg[64]; 302 QemuOptsList *list; 303 QemuOpts *opts; 304 int rc, offset; 305 306 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset); 307 if (rc < 3 || str[offset] != '=') { 308 error_report("can't parse: \"%s\"", str); 309 return -1; 310 } 311 312 list = qemu_find_opts(group); 313 if (list == NULL) { 314 return -1; 315 } 316 317 opts = qemu_opts_find(list, id); 318 if (!opts) { 319 error_report("there is no %s \"%s\" defined", 320 list->name, id); 321 return -1; 322 } 323 324 qemu_opt_set(opts, arg, str + offset + 1, &local_err); 325 if (local_err) { 326 error_report_err(local_err); 327 return -1; 328 } 329 return 0; 330 } 331 332 struct ConfigWriteData { 333 QemuOptsList *list; 334 FILE *fp; 335 }; 336 337 static int config_write_opt(void *opaque, const char *name, const char *value, 338 Error **errp) 339 { 340 struct ConfigWriteData *data = opaque; 341 342 fprintf(data->fp, " %s = \"%s\"\n", name, value); 343 return 0; 344 } 345 346 static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp) 347 { 348 struct ConfigWriteData *data = opaque; 349 const char *id = qemu_opts_id(opts); 350 351 if (id) { 352 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id); 353 } else { 354 fprintf(data->fp, "[%s]\n", data->list->name); 355 } 356 qemu_opt_foreach(opts, config_write_opt, data, NULL); 357 fprintf(data->fp, "\n"); 358 return 0; 359 } 360 361 void qemu_config_write(FILE *fp) 362 { 363 struct ConfigWriteData data = { .fp = fp }; 364 QemuOptsList **lists = vm_config_groups; 365 int i; 366 367 fprintf(fp, "# qemu config file\n\n"); 368 for (i = 0; lists[i] != NULL; i++) { 369 data.list = lists[i]; 370 qemu_opts_foreach(data.list, config_write_opts, &data, NULL); 371 } 372 } 373 374 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) 375 { 376 char line[1024], group[64], id[64], arg[64], value[1024]; 377 Location loc; 378 QemuOptsList *list = NULL; 379 Error *local_err = NULL; 380 QemuOpts *opts = NULL; 381 int res = -1, lno = 0; 382 383 loc_push_none(&loc); 384 while (fgets(line, sizeof(line), fp) != NULL) { 385 loc_set_file(fname, ++lno); 386 if (line[0] == '\n') { 387 /* skip empty lines */ 388 continue; 389 } 390 if (line[0] == '#') { 391 /* comment */ 392 continue; 393 } 394 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) { 395 /* group with id */ 396 list = find_list(lists, group, &local_err); 397 if (local_err) { 398 error_report_err(local_err); 399 goto out; 400 } 401 opts = qemu_opts_create(list, id, 1, NULL); 402 continue; 403 } 404 if (sscanf(line, "[%63[^]]]", group) == 1) { 405 /* group without id */ 406 list = find_list(lists, group, &local_err); 407 if (local_err) { 408 error_report_err(local_err); 409 goto out; 410 } 411 opts = qemu_opts_create(list, NULL, 0, &error_abort); 412 continue; 413 } 414 value[0] = '\0'; 415 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 || 416 sscanf(line, " %63s = \"\"", arg) == 1) { 417 /* arg = value */ 418 if (opts == NULL) { 419 error_report("no group defined"); 420 goto out; 421 } 422 qemu_opt_set(opts, arg, value, &local_err); 423 if (local_err) { 424 error_report_err(local_err); 425 goto out; 426 } 427 continue; 428 } 429 error_report("parse error"); 430 goto out; 431 } 432 if (ferror(fp)) { 433 error_report("error reading file"); 434 goto out; 435 } 436 res = 0; 437 out: 438 loc_pop(&loc); 439 return res; 440 } 441 442 int qemu_read_config_file(const char *filename) 443 { 444 FILE *f = fopen(filename, "r"); 445 int ret; 446 447 if (f == NULL) { 448 return -errno; 449 } 450 451 ret = qemu_config_parse(f, vm_config_groups, filename); 452 fclose(f); 453 454 if (ret == 0) { 455 return 0; 456 } else { 457 return -EINVAL; 458 } 459 } 460 461 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts, 462 Error **errp) 463 { 464 QemuOpts *subopts; 465 QDict *subqdict; 466 QList *list = NULL; 467 Error *local_err = NULL; 468 size_t orig_size, enum_size; 469 char *prefix; 470 471 prefix = g_strdup_printf("%s.", opts->name); 472 qdict_extract_subqdict(options, &subqdict, prefix); 473 g_free(prefix); 474 orig_size = qdict_size(subqdict); 475 if (!orig_size) { 476 goto out; 477 } 478 479 subopts = qemu_opts_create(opts, NULL, 0, &local_err); 480 if (local_err) { 481 error_propagate(errp, local_err); 482 goto out; 483 } 484 485 qemu_opts_absorb_qdict(subopts, subqdict, &local_err); 486 if (local_err) { 487 error_propagate(errp, local_err); 488 goto out; 489 } 490 491 enum_size = qdict_size(subqdict); 492 if (enum_size < orig_size && enum_size) { 493 error_setg(errp, "Unknown option '%s' for [%s]", 494 qdict_first(subqdict)->key, opts->name); 495 goto out; 496 } 497 498 if (enum_size) { 499 /* Multiple, enumerated sections */ 500 QListEntry *list_entry; 501 unsigned i = 0; 502 503 /* Not required anymore */ 504 qemu_opts_del(subopts); 505 506 qdict_array_split(subqdict, &list); 507 if (qdict_size(subqdict)) { 508 error_setg(errp, "Unused option '%s' for [%s]", 509 qdict_first(subqdict)->key, opts->name); 510 goto out; 511 } 512 513 QLIST_FOREACH_ENTRY(list, list_entry) { 514 QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry)); 515 char *opt_name; 516 517 if (!section) { 518 error_setg(errp, "[%s] section (index %u) does not consist of " 519 "keys", opts->name, i); 520 goto out; 521 } 522 523 opt_name = g_strdup_printf("%s.%u", opts->name, i++); 524 subopts = qemu_opts_create(opts, opt_name, 1, &local_err); 525 g_free(opt_name); 526 if (local_err) { 527 error_propagate(errp, local_err); 528 goto out; 529 } 530 531 qemu_opts_absorb_qdict(subopts, section, &local_err); 532 if (local_err) { 533 error_propagate(errp, local_err); 534 qemu_opts_del(subopts); 535 goto out; 536 } 537 538 if (qdict_size(section)) { 539 error_setg(errp, "[%s] section doesn't support the option '%s'", 540 opts->name, qdict_first(section)->key); 541 qemu_opts_del(subopts); 542 goto out; 543 } 544 } 545 } 546 547 out: 548 QDECREF(subqdict); 549 QDECREF(list); 550 } 551 552 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists, 553 Error **errp) 554 { 555 int i; 556 Error *local_err = NULL; 557 558 for (i = 0; lists[i]; i++) { 559 config_parse_qdict_section(options, lists[i], &local_err); 560 if (local_err) { 561 error_propagate(errp, local_err); 562 return; 563 } 564 } 565 } 566