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/qmp/qerror.h" 6 #include "hw/qdev.h" 7 #include "qapi/error.h" 8 #include "qmp-commands.h" 9 10 static QemuOptsList *vm_config_groups[32]; 11 static QemuOptsList *drive_config_groups[4]; 12 13 static QemuOptsList *find_list(QemuOptsList **lists, const char *group, 14 Error **errp) 15 { 16 int i; 17 18 for (i = 0; lists[i] != NULL; i++) { 19 if (strcmp(lists[i]->name, group) == 0) 20 break; 21 } 22 if (lists[i] == NULL) { 23 error_setg(errp, "There is no option group '%s'", group); 24 } 25 return lists[i]; 26 } 27 28 QemuOptsList *qemu_find_opts(const char *group) 29 { 30 QemuOptsList *ret; 31 Error *local_err = NULL; 32 33 ret = find_list(vm_config_groups, group, &local_err); 34 if (local_err) { 35 error_report_err(local_err); 36 } 37 38 return ret; 39 } 40 41 QemuOpts *qemu_find_opts_singleton(const char *group) 42 { 43 QemuOptsList *list; 44 QemuOpts *opts; 45 46 list = qemu_find_opts(group); 47 assert(list); 48 opts = qemu_opts_find(list, NULL); 49 if (!opts) { 50 opts = qemu_opts_create(list, NULL, 0, &error_abort); 51 } 52 return opts; 53 } 54 55 static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc) 56 { 57 CommandLineParameterInfoList *param_list = NULL, *entry; 58 CommandLineParameterInfo *info; 59 int i; 60 61 for (i = 0; desc[i].name != NULL; i++) { 62 info = g_malloc0(sizeof(*info)); 63 info->name = g_strdup(desc[i].name); 64 65 switch (desc[i].type) { 66 case QEMU_OPT_STRING: 67 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING; 68 break; 69 case QEMU_OPT_BOOL: 70 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN; 71 break; 72 case QEMU_OPT_NUMBER: 73 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER; 74 break; 75 case QEMU_OPT_SIZE: 76 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE; 77 break; 78 } 79 80 if (desc[i].help) { 81 info->has_help = true; 82 info->help = g_strdup(desc[i].help); 83 } 84 if (desc[i].def_value_str) { 85 info->has_q_default = true; 86 info->q_default = g_strdup(desc[i].def_value_str); 87 } 88 89 entry = g_malloc0(sizeof(*entry)); 90 entry->value = info; 91 entry->next = param_list; 92 param_list = entry; 93 } 94 95 return param_list; 96 } 97 98 /* remove repeated entry from the info list */ 99 static void cleanup_infolist(CommandLineParameterInfoList *head) 100 { 101 CommandLineParameterInfoList *pre_entry, *cur, *del_entry; 102 103 cur = head; 104 while (cur->next) { 105 pre_entry = head; 106 while (pre_entry != cur->next) { 107 if (!strcmp(pre_entry->value->name, cur->next->value->name)) { 108 del_entry = cur->next; 109 cur->next = cur->next->next; 110 g_free(del_entry); 111 break; 112 } 113 pre_entry = pre_entry->next; 114 } 115 cur = cur->next; 116 } 117 } 118 119 /* merge the description items of two parameter infolists */ 120 static void connect_infolist(CommandLineParameterInfoList *head, 121 CommandLineParameterInfoList *new) 122 { 123 CommandLineParameterInfoList *cur; 124 125 cur = head; 126 while (cur->next) { 127 cur = cur->next; 128 } 129 cur->next = new; 130 } 131 132 /* access all the local QemuOptsLists for drive option */ 133 static CommandLineParameterInfoList *get_drive_infolist(void) 134 { 135 CommandLineParameterInfoList *head = NULL, *cur; 136 int i; 137 138 for (i = 0; drive_config_groups[i] != NULL; i++) { 139 if (!head) { 140 head = query_option_descs(drive_config_groups[i]->desc); 141 } else { 142 cur = query_option_descs(drive_config_groups[i]->desc); 143 connect_infolist(head, cur); 144 } 145 } 146 cleanup_infolist(head); 147 148 return head; 149 } 150 151 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option, 152 const char *option, 153 Error **errp) 154 { 155 CommandLineOptionInfoList *conf_list = NULL, *entry; 156 CommandLineOptionInfo *info; 157 int i; 158 159 for (i = 0; vm_config_groups[i] != NULL; i++) { 160 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) { 161 info = g_malloc0(sizeof(*info)); 162 info->option = g_strdup(vm_config_groups[i]->name); 163 if (!strcmp("drive", vm_config_groups[i]->name)) { 164 info->parameters = get_drive_infolist(); 165 } else { 166 info->parameters = 167 query_option_descs(vm_config_groups[i]->desc); 168 } 169 entry = g_malloc0(sizeof(*entry)); 170 entry->value = info; 171 entry->next = conf_list; 172 conf_list = entry; 173 } 174 } 175 176 if (conf_list == NULL) { 177 error_setg(errp, "invalid option name: %s", option); 178 } 179 180 return conf_list; 181 } 182 183 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp) 184 { 185 return find_list(vm_config_groups, group, errp); 186 } 187 188 void qemu_add_drive_opts(QemuOptsList *list) 189 { 190 int entries, i; 191 192 entries = ARRAY_SIZE(drive_config_groups); 193 entries--; /* keep list NULL terminated */ 194 for (i = 0; i < entries; i++) { 195 if (drive_config_groups[i] == NULL) { 196 drive_config_groups[i] = list; 197 return; 198 } 199 } 200 fprintf(stderr, "ran out of space in drive_config_groups"); 201 abort(); 202 } 203 204 void qemu_add_opts(QemuOptsList *list) 205 { 206 int entries, i; 207 208 entries = ARRAY_SIZE(vm_config_groups); 209 entries--; /* keep list NULL terminated */ 210 for (i = 0; i < entries; i++) { 211 if (vm_config_groups[i] == NULL) { 212 vm_config_groups[i] = list; 213 return; 214 } 215 } 216 fprintf(stderr, "ran out of space in vm_config_groups"); 217 abort(); 218 } 219 220 int qemu_set_option(const char *str) 221 { 222 char group[64], id[64], arg[64]; 223 QemuOptsList *list; 224 QemuOpts *opts; 225 int rc, offset; 226 227 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset); 228 if (rc < 3 || str[offset] != '=') { 229 error_report("can't parse: \"%s\"", str); 230 return -1; 231 } 232 233 list = qemu_find_opts(group); 234 if (list == NULL) { 235 return -1; 236 } 237 238 opts = qemu_opts_find(list, id); 239 if (!opts) { 240 error_report("there is no %s \"%s\" defined", 241 list->name, id); 242 return -1; 243 } 244 245 if (qemu_opt_set(opts, arg, str+offset+1) == -1) { 246 return -1; 247 } 248 return 0; 249 } 250 251 struct ConfigWriteData { 252 QemuOptsList *list; 253 FILE *fp; 254 }; 255 256 static int config_write_opt(const char *name, const char *value, void *opaque) 257 { 258 struct ConfigWriteData *data = opaque; 259 260 fprintf(data->fp, " %s = \"%s\"\n", name, value); 261 return 0; 262 } 263 264 static int config_write_opts(QemuOpts *opts, void *opaque) 265 { 266 struct ConfigWriteData *data = opaque; 267 const char *id = qemu_opts_id(opts); 268 269 if (id) { 270 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id); 271 } else { 272 fprintf(data->fp, "[%s]\n", data->list->name); 273 } 274 qemu_opt_foreach(opts, config_write_opt, data, 0); 275 fprintf(data->fp, "\n"); 276 return 0; 277 } 278 279 void qemu_config_write(FILE *fp) 280 { 281 struct ConfigWriteData data = { .fp = fp }; 282 QemuOptsList **lists = vm_config_groups; 283 int i; 284 285 fprintf(fp, "# qemu config file\n\n"); 286 for (i = 0; lists[i] != NULL; i++) { 287 data.list = lists[i]; 288 qemu_opts_foreach(data.list, config_write_opts, &data, 0); 289 } 290 } 291 292 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname) 293 { 294 char line[1024], group[64], id[64], arg[64], value[1024]; 295 Location loc; 296 QemuOptsList *list = NULL; 297 Error *local_err = NULL; 298 QemuOpts *opts = NULL; 299 int res = -1, lno = 0; 300 301 loc_push_none(&loc); 302 while (fgets(line, sizeof(line), fp) != NULL) { 303 loc_set_file(fname, ++lno); 304 if (line[0] == '\n') { 305 /* skip empty lines */ 306 continue; 307 } 308 if (line[0] == '#') { 309 /* comment */ 310 continue; 311 } 312 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) { 313 /* group with id */ 314 list = find_list(lists, group, &local_err); 315 if (local_err) { 316 error_report_err(local_err); 317 goto out; 318 } 319 opts = qemu_opts_create(list, id, 1, NULL); 320 continue; 321 } 322 if (sscanf(line, "[%63[^]]]", group) == 1) { 323 /* group without id */ 324 list = find_list(lists, group, &local_err); 325 if (local_err) { 326 error_report_err(local_err); 327 goto out; 328 } 329 opts = qemu_opts_create(list, NULL, 0, &error_abort); 330 continue; 331 } 332 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) { 333 /* arg = value */ 334 if (opts == NULL) { 335 error_report("no group defined"); 336 goto out; 337 } 338 if (qemu_opt_set(opts, arg, value) != 0) { 339 goto out; 340 } 341 continue; 342 } 343 error_report("parse error"); 344 goto out; 345 } 346 if (ferror(fp)) { 347 error_report("error reading file"); 348 goto out; 349 } 350 res = 0; 351 out: 352 loc_pop(&loc); 353 return res; 354 } 355 356 int qemu_read_config_file(const char *filename) 357 { 358 FILE *f = fopen(filename, "r"); 359 int ret; 360 361 if (f == NULL) { 362 return -errno; 363 } 364 365 ret = qemu_config_parse(f, vm_config_groups, filename); 366 fclose(f); 367 368 if (ret == 0) { 369 return 0; 370 } else { 371 return -EINVAL; 372 } 373 } 374 375 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts, 376 Error **errp) 377 { 378 QemuOpts *subopts; 379 QDict *subqdict; 380 QList *list = NULL; 381 Error *local_err = NULL; 382 size_t orig_size, enum_size; 383 char *prefix; 384 385 prefix = g_strdup_printf("%s.", opts->name); 386 qdict_extract_subqdict(options, &subqdict, prefix); 387 g_free(prefix); 388 orig_size = qdict_size(subqdict); 389 if (!orig_size) { 390 goto out; 391 } 392 393 subopts = qemu_opts_create(opts, NULL, 0, &local_err); 394 if (local_err) { 395 error_propagate(errp, local_err); 396 goto out; 397 } 398 399 qemu_opts_absorb_qdict(subopts, subqdict, &local_err); 400 if (local_err) { 401 error_propagate(errp, local_err); 402 goto out; 403 } 404 405 enum_size = qdict_size(subqdict); 406 if (enum_size < orig_size && enum_size) { 407 error_setg(errp, "Unknown option '%s' for [%s]", 408 qdict_first(subqdict)->key, opts->name); 409 goto out; 410 } 411 412 if (enum_size) { 413 /* Multiple, enumerated sections */ 414 QListEntry *list_entry; 415 unsigned i = 0; 416 417 /* Not required anymore */ 418 qemu_opts_del(subopts); 419 420 qdict_array_split(subqdict, &list); 421 if (qdict_size(subqdict)) { 422 error_setg(errp, "Unused option '%s' for [%s]", 423 qdict_first(subqdict)->key, opts->name); 424 goto out; 425 } 426 427 QLIST_FOREACH_ENTRY(list, list_entry) { 428 QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry)); 429 char *opt_name; 430 431 if (!section) { 432 error_setg(errp, "[%s] section (index %u) does not consist of " 433 "keys", opts->name, i); 434 goto out; 435 } 436 437 opt_name = g_strdup_printf("%s.%u", opts->name, i++); 438 subopts = qemu_opts_create(opts, opt_name, 1, &local_err); 439 g_free(opt_name); 440 if (local_err) { 441 error_propagate(errp, local_err); 442 goto out; 443 } 444 445 qemu_opts_absorb_qdict(subopts, section, &local_err); 446 if (local_err) { 447 error_propagate(errp, local_err); 448 qemu_opts_del(subopts); 449 goto out; 450 } 451 452 if (qdict_size(section)) { 453 error_setg(errp, "[%s] section doesn't support the option '%s'", 454 opts->name, qdict_first(section)->key); 455 qemu_opts_del(subopts); 456 goto out; 457 } 458 } 459 } 460 461 out: 462 QDECREF(subqdict); 463 QDECREF(list); 464 } 465 466 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists, 467 Error **errp) 468 { 469 int i; 470 Error *local_err = NULL; 471 472 for (i = 0; lists[i]; i++) { 473 config_parse_qdict_section(options, lists[i], &local_err); 474 if (local_err) { 475 error_propagate(errp, local_err); 476 return; 477 } 478 } 479 } 480