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"
8 static QemuOptsList *vm_config_groups[48];
9 static QemuOptsList *drive_config_groups[5];
11 static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
16 for (i = 0; lists[i] != NULL; i++) {
17 if (strcmp(lists[i]->name, group) == 0)
20 if (lists[i] == NULL) {
21 error_setg(errp, "There is no option group '%s'", group);
26 QemuOptsList *qemu_find_opts(const char *group)
29 Error *local_err = NULL;
31 ret = find_list(vm_config_groups, group, &local_err);
33 error_report_err(local_err);
39 QemuOpts *qemu_find_opts_singleton(const char *group)
44 list = qemu_find_opts(group);
46 opts = qemu_opts_find(list, NULL);
48 opts = qemu_opts_create(list, NULL, 0, &error_abort);
53 static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
55 CommandLineParameterInfoList *param_list = NULL, *entry;
56 CommandLineParameterInfo *info;
59 for (i = 0; desc[i].name != NULL; i++) {
60 info = g_malloc0(sizeof(*info));
61 info->name = g_strdup(desc[i].name);
63 switch (desc[i].type) {
65 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
68 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
71 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
74 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
79 info->has_help = true;
80 info->help = g_strdup(desc[i].help);
82 if (desc[i].def_value_str) {
83 info->has_q_default = true;
84 info->q_default = g_strdup(desc[i].def_value_str);
87 entry = g_malloc0(sizeof(*entry));
89 entry->next = param_list;
96 /* remove repeated entry from the info list */
97 static void cleanup_infolist(CommandLineParameterInfoList *head)
99 CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
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;
111 pre_entry = pre_entry->next;
117 /* merge the description items of two parameter infolists */
118 static void connect_infolist(CommandLineParameterInfoList *head,
119 CommandLineParameterInfoList *new)
121 CommandLineParameterInfoList *cur;
130 /* access all the local QemuOptsLists for drive option */
131 static CommandLineParameterInfoList *get_drive_infolist(void)
133 CommandLineParameterInfoList *head = NULL, *cur;
136 for (i = 0; drive_config_groups[i] != NULL; i++) {
138 head = query_option_descs(drive_config_groups[i]->desc);
140 cur = query_option_descs(drive_config_groups[i]->desc);
141 connect_infolist(head, cur);
144 cleanup_infolist(head);
149 /* restore machine options that are now machine's properties */
150 static QemuOptsList machine_opts = {
152 .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head),
156 .type = QEMU_OPT_STRING,
157 .help = "emulated machine"
160 .type = QEMU_OPT_STRING,
161 .help = "accelerator list",
163 .name = "kernel_irqchip",
164 .type = QEMU_OPT_BOOL,
165 .help = "use KVM in-kernel irqchip",
167 .name = "kvm_shadow_mem",
168 .type = QEMU_OPT_SIZE,
169 .help = "KVM shadow MMU size",
172 .type = QEMU_OPT_STRING,
173 .help = "Linux kernel image file",
176 .type = QEMU_OPT_STRING,
177 .help = "Linux initial ramdisk file",
180 .type = QEMU_OPT_STRING,
181 .help = "Linux kernel command line",
184 .type = QEMU_OPT_STRING,
185 .help = "Linux kernel device tree file",
188 .type = QEMU_OPT_STRING,
189 .help = "Dump current dtb to a file and quit",
191 .name = "phandle_start",
192 .type = QEMU_OPT_NUMBER,
193 .help = "The first phandle ID we may generate dynamically",
195 .name = "dt_compatible",
196 .type = QEMU_OPT_STRING,
197 .help = "Overrides the \"compatible\" property of the dt root node",
199 .name = "dump-guest-core",
200 .type = QEMU_OPT_BOOL,
201 .help = "Include guest memory in a core dump",
204 .type = QEMU_OPT_BOOL,
205 .help = "enable/disable memory merge support",
208 .type = QEMU_OPT_BOOL,
209 .help = "Set on/off to enable/disable usb",
212 .type = QEMU_OPT_STRING,
213 .help = "firmware image",
216 .type = QEMU_OPT_BOOL,
217 .help = "Set on/off to enable/disable Intel IOMMU (VT-d)",
219 .name = "suppress-vmdesc",
220 .type = QEMU_OPT_BOOL,
221 .help = "Set on to disable self-describing migration",
223 .name = "aes-key-wrap",
224 .type = QEMU_OPT_BOOL,
225 .help = "enable/disable AES key wrapping using the CPACF wrapping key",
227 .name = "dea-key-wrap",
228 .type = QEMU_OPT_BOOL,
229 .help = "enable/disable DEA key wrapping using the CPACF wrapping key",
232 .type = QEMU_OPT_STRING,
233 .help = "Up to 8 chars in set of [A-Za-z0-9. ](lower case chars"
234 " converted to upper case) to pass to machine"
235 " loader, boot manager, and guest kernel",
237 { /* End of list */ }
241 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
245 CommandLineOptionInfoList *conf_list = NULL, *entry;
246 CommandLineOptionInfo *info;
249 for (i = 0; vm_config_groups[i] != NULL; i++) {
250 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
251 info = g_malloc0(sizeof(*info));
252 info->option = g_strdup(vm_config_groups[i]->name);
253 if (!strcmp("drive", vm_config_groups[i]->name)) {
254 info->parameters = get_drive_infolist();
255 } else if (!strcmp("machine", vm_config_groups[i]->name)) {
256 info->parameters = query_option_descs(machine_opts.desc);
259 query_option_descs(vm_config_groups[i]->desc);
261 entry = g_malloc0(sizeof(*entry));
263 entry->next = conf_list;
268 if (conf_list == NULL) {
269 error_setg(errp, "invalid option name: %s", option);
275 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
277 return find_list(vm_config_groups, group, errp);
280 void qemu_add_drive_opts(QemuOptsList *list)
284 entries = ARRAY_SIZE(drive_config_groups);
285 entries--; /* keep list NULL terminated */
286 for (i = 0; i < entries; i++) {
287 if (drive_config_groups[i] == NULL) {
288 drive_config_groups[i] = list;
292 fprintf(stderr, "ran out of space in drive_config_groups");
296 void qemu_add_opts(QemuOptsList *list)
300 entries = ARRAY_SIZE(vm_config_groups);
301 entries--; /* keep list NULL terminated */
302 for (i = 0; i < entries; i++) {
303 if (vm_config_groups[i] == NULL) {
304 vm_config_groups[i] = list;
308 fprintf(stderr, "ran out of space in vm_config_groups");
312 int qemu_set_option(const char *str)
314 Error *local_err = NULL;
315 char group[64], id[64], arg[64];
320 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
321 if (rc < 3 || str[offset] != '=') {
322 error_report("can't parse: \"%s\"", str);
326 list = qemu_find_opts(group);
331 opts = qemu_opts_find(list, id);
333 error_report("there is no %s \"%s\" defined",
338 qemu_opt_set(opts, arg, str + offset + 1, &local_err);
340 error_report_err(local_err);
346 struct ConfigWriteData {
351 static int config_write_opt(void *opaque, const char *name, const char *value,
354 struct ConfigWriteData *data = opaque;
356 fprintf(data->fp, " %s = \"%s\"\n", name, value);
360 static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp)
362 struct ConfigWriteData *data = opaque;
363 const char *id = qemu_opts_id(opts);
366 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
368 fprintf(data->fp, "[%s]\n", data->list->name);
370 qemu_opt_foreach(opts, config_write_opt, data, NULL);
371 fprintf(data->fp, "\n");
375 void qemu_config_write(FILE *fp)
377 struct ConfigWriteData data = { .fp = fp };
378 QemuOptsList **lists = vm_config_groups;
381 fprintf(fp, "# qemu config file\n\n");
382 for (i = 0; lists[i] != NULL; i++) {
383 data.list = lists[i];
384 qemu_opts_foreach(data.list, config_write_opts, &data, NULL);
388 /* Returns number of config groups on success, -errno on error */
389 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
391 char line[1024], group[64], id[64], arg[64], value[1024];
393 QemuOptsList *list = NULL;
394 Error *local_err = NULL;
395 QemuOpts *opts = NULL;
396 int res = -EINVAL, lno = 0;
400 while (fgets(line, sizeof(line), fp) != NULL) {
401 loc_set_file(fname, ++lno);
402 if (line[0] == '\n') {
403 /* skip empty lines */
406 if (line[0] == '#') {
410 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
412 list = find_list(lists, group, &local_err);
414 error_report_err(local_err);
417 opts = qemu_opts_create(list, id, 1, NULL);
421 if (sscanf(line, "[%63[^]]]", group) == 1) {
422 /* group without id */
423 list = find_list(lists, group, &local_err);
425 error_report_err(local_err);
428 opts = qemu_opts_create(list, NULL, 0, &error_abort);
433 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
434 sscanf(line, " %63s = \"\"", arg) == 1) {
437 error_report("no group defined");
440 qemu_opt_set(opts, arg, value, &local_err);
442 error_report_err(local_err);
447 error_report("parse error");
451 error_report("error reading file");
460 int qemu_read_config_file(const char *filename)
462 FILE *f = fopen(filename, "r");
469 ret = qemu_config_parse(f, vm_config_groups, filename);
474 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
480 Error *local_err = NULL;
481 size_t orig_size, enum_size;
484 prefix = g_strdup_printf("%s.", opts->name);
485 qdict_extract_subqdict(options, &subqdict, prefix);
487 orig_size = qdict_size(subqdict);
492 subopts = qemu_opts_create(opts, NULL, 0, &local_err);
494 error_propagate(errp, local_err);
498 qemu_opts_absorb_qdict(subopts, subqdict, &local_err);
500 error_propagate(errp, local_err);
504 enum_size = qdict_size(subqdict);
505 if (enum_size < orig_size && enum_size) {
506 error_setg(errp, "Unknown option '%s' for [%s]",
507 qdict_first(subqdict)->key, opts->name);
512 /* Multiple, enumerated sections */
513 QListEntry *list_entry;
516 /* Not required anymore */
517 qemu_opts_del(subopts);
519 qdict_array_split(subqdict, &list);
520 if (qdict_size(subqdict)) {
521 error_setg(errp, "Unused option '%s' for [%s]",
522 qdict_first(subqdict)->key, opts->name);
526 QLIST_FOREACH_ENTRY(list, list_entry) {
527 QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry));
531 error_setg(errp, "[%s] section (index %u) does not consist of "
532 "keys", opts->name, i);
536 opt_name = g_strdup_printf("%s.%u", opts->name, i++);
537 subopts = qemu_opts_create(opts, opt_name, 1, &local_err);
540 error_propagate(errp, local_err);
544 qemu_opts_absorb_qdict(subopts, section, &local_err);
546 error_propagate(errp, local_err);
547 qemu_opts_del(subopts);
551 if (qdict_size(section)) {
552 error_setg(errp, "[%s] section doesn't support the option '%s'",
553 opts->name, qdict_first(section)->key);
554 qemu_opts_del(subopts);
565 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
569 Error *local_err = NULL;
571 for (i = 0; lists[i]; i++) {
572 config_parse_qdict_section(options, lists[i], &local_err);
574 error_propagate(errp, local_err);