1 #include "qemu/osdep.h"
2 #include "block/qdict.h" /* for qdict_extract_subqdict() */
3 #include "qapi/error.h"
4 #include "qapi/qapi-commands-misc.h"
5 #include "qapi/qmp/qdict.h"
6 #include "qapi/qmp/qlist.h"
7 #include "qemu/error-report.h"
8 #include "qemu/option.h"
9 #include "qemu/config-file.h"
11 static QemuOptsList *vm_config_groups[48];
12 static QemuOptsList *drive_config_groups[5];
14 static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
19 for (i = 0; lists[i] != NULL; i++) {
20 if (strcmp(lists[i]->name, group) == 0)
23 if (lists[i] == NULL) {
24 error_setg(errp, "There is no option group '%s'", group);
29 QemuOptsList *qemu_find_opts(const char *group)
32 Error *local_err = NULL;
34 ret = find_list(vm_config_groups, group, &local_err);
36 error_report_err(local_err);
42 QemuOpts *qemu_find_opts_singleton(const char *group)
47 list = qemu_find_opts(group);
49 opts = qemu_opts_find(list, NULL);
51 opts = qemu_opts_create(list, NULL, 0, &error_abort);
56 static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
58 CommandLineParameterInfoList *param_list = NULL, *entry;
59 CommandLineParameterInfo *info;
62 for (i = 0; desc[i].name != NULL; i++) {
63 info = g_malloc0(sizeof(*info));
64 info->name = g_strdup(desc[i].name);
66 switch (desc[i].type) {
68 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
71 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
74 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
77 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
82 info->has_help = true;
83 info->help = g_strdup(desc[i].help);
85 if (desc[i].def_value_str) {
86 info->has_q_default = true;
87 info->q_default = g_strdup(desc[i].def_value_str);
90 entry = g_malloc0(sizeof(*entry));
92 entry->next = param_list;
99 /* remove repeated entry from the info list */
100 static void cleanup_infolist(CommandLineParameterInfoList *head)
102 CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
107 while (pre_entry != cur->next) {
108 if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
109 del_entry = cur->next;
110 cur->next = cur->next->next;
111 del_entry->next = NULL;
112 qapi_free_CommandLineParameterInfoList(del_entry);
115 pre_entry = pre_entry->next;
121 /* merge the description items of two parameter infolists */
122 static void connect_infolist(CommandLineParameterInfoList *head,
123 CommandLineParameterInfoList *new)
125 CommandLineParameterInfoList *cur;
134 /* access all the local QemuOptsLists for drive option */
135 static CommandLineParameterInfoList *get_drive_infolist(void)
137 CommandLineParameterInfoList *head = NULL, *cur;
140 for (i = 0; drive_config_groups[i] != NULL; i++) {
142 head = query_option_descs(drive_config_groups[i]->desc);
144 cur = query_option_descs(drive_config_groups[i]->desc);
145 connect_infolist(head, cur);
148 cleanup_infolist(head);
153 /* restore machine options that are now machine's properties */
154 static QemuOptsList machine_opts = {
156 .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head),
160 .type = QEMU_OPT_STRING,
161 .help = "emulated machine"
164 .type = QEMU_OPT_STRING,
165 .help = "accelerator list",
167 .name = "kernel_irqchip",
168 .type = QEMU_OPT_BOOL,
169 .help = "use KVM in-kernel irqchip",
171 .name = "kvm_shadow_mem",
172 .type = QEMU_OPT_SIZE,
173 .help = "KVM shadow MMU size",
176 .type = QEMU_OPT_STRING,
177 .help = "Linux kernel image file",
180 .type = QEMU_OPT_STRING,
181 .help = "Linux initial ramdisk file",
184 .type = QEMU_OPT_STRING,
185 .help = "Linux kernel command line",
188 .type = QEMU_OPT_STRING,
189 .help = "Linux kernel device tree file",
192 .type = QEMU_OPT_STRING,
193 .help = "Dump current dtb to a file and quit",
195 .name = "phandle_start",
196 .type = QEMU_OPT_NUMBER,
197 .help = "The first phandle ID we may generate dynamically",
199 .name = "dt_compatible",
200 .type = QEMU_OPT_STRING,
201 .help = "Overrides the \"compatible\" property of the dt root node",
203 .name = "dump-guest-core",
204 .type = QEMU_OPT_BOOL,
205 .help = "Include guest memory in a core dump",
208 .type = QEMU_OPT_BOOL,
209 .help = "enable/disable memory merge support",
212 .type = QEMU_OPT_BOOL,
213 .help = "Set on/off to enable/disable usb",
216 .type = QEMU_OPT_STRING,
217 .help = "firmware image",
220 .type = QEMU_OPT_BOOL,
221 .help = "Set on/off to enable/disable Intel IOMMU (VT-d)",
223 .name = "suppress-vmdesc",
224 .type = QEMU_OPT_BOOL,
225 .help = "Set on to disable self-describing migration",
227 .name = "aes-key-wrap",
228 .type = QEMU_OPT_BOOL,
229 .help = "enable/disable AES key wrapping using the CPACF wrapping key",
231 .name = "dea-key-wrap",
232 .type = QEMU_OPT_BOOL,
233 .help = "enable/disable DEA key wrapping using the CPACF wrapping key",
236 .type = QEMU_OPT_STRING,
237 .help = "Up to 8 chars in set of [A-Za-z0-9. ](lower case chars"
238 " converted to upper case) to pass to machine"
239 " loader, boot manager, and guest kernel",
241 { /* End of list */ }
245 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
249 CommandLineOptionInfoList *conf_list = NULL, *entry;
250 CommandLineOptionInfo *info;
253 for (i = 0; vm_config_groups[i] != NULL; i++) {
254 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
255 info = g_malloc0(sizeof(*info));
256 info->option = g_strdup(vm_config_groups[i]->name);
257 if (!strcmp("drive", vm_config_groups[i]->name)) {
258 info->parameters = get_drive_infolist();
259 } else if (!strcmp("machine", vm_config_groups[i]->name)) {
260 info->parameters = query_option_descs(machine_opts.desc);
263 query_option_descs(vm_config_groups[i]->desc);
265 entry = g_malloc0(sizeof(*entry));
267 entry->next = conf_list;
272 if (conf_list == NULL) {
273 error_setg(errp, "invalid option name: %s", option);
279 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
281 return find_list(vm_config_groups, group, errp);
284 void qemu_add_drive_opts(QemuOptsList *list)
288 entries = ARRAY_SIZE(drive_config_groups);
289 entries--; /* keep list NULL terminated */
290 for (i = 0; i < entries; i++) {
291 if (drive_config_groups[i] == NULL) {
292 drive_config_groups[i] = list;
296 fprintf(stderr, "ran out of space in drive_config_groups");
300 void qemu_add_opts(QemuOptsList *list)
304 entries = ARRAY_SIZE(vm_config_groups);
305 entries--; /* keep list NULL terminated */
306 for (i = 0; i < entries; i++) {
307 if (vm_config_groups[i] == NULL) {
308 vm_config_groups[i] = list;
312 fprintf(stderr, "ran out of space in vm_config_groups");
316 int qemu_set_option(const char *str)
318 Error *local_err = NULL;
319 char group[64], id[64], arg[64];
324 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
325 if (rc < 3 || str[offset] != '=') {
326 error_report("can't parse: \"%s\"", str);
330 list = qemu_find_opts(group);
335 opts = qemu_opts_find(list, id);
337 error_report("there is no %s \"%s\" defined",
342 qemu_opt_set(opts, arg, str + offset + 1, &local_err);
344 error_report_err(local_err);
350 struct ConfigWriteData {
355 static int config_write_opt(void *opaque, const char *name, const char *value,
358 struct ConfigWriteData *data = opaque;
360 fprintf(data->fp, " %s = \"%s\"\n", name, value);
364 static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp)
366 struct ConfigWriteData *data = opaque;
367 const char *id = qemu_opts_id(opts);
370 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
372 fprintf(data->fp, "[%s]\n", data->list->name);
374 qemu_opt_foreach(opts, config_write_opt, data, NULL);
375 fprintf(data->fp, "\n");
379 void qemu_config_write(FILE *fp)
381 struct ConfigWriteData data = { .fp = fp };
382 QemuOptsList **lists = vm_config_groups;
385 fprintf(fp, "# qemu config file\n\n");
386 for (i = 0; lists[i] != NULL; i++) {
387 data.list = lists[i];
388 qemu_opts_foreach(data.list, config_write_opts, &data, NULL);
392 /* Returns number of config groups on success, -errno on error */
393 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
395 char line[1024], group[64], id[64], arg[64], value[1024];
397 QemuOptsList *list = NULL;
398 Error *local_err = NULL;
399 QemuOpts *opts = NULL;
400 int res = -EINVAL, lno = 0;
404 while (fgets(line, sizeof(line), fp) != NULL) {
405 loc_set_file(fname, ++lno);
406 if (line[0] == '\n') {
407 /* skip empty lines */
410 if (line[0] == '#') {
414 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
416 list = find_list(lists, group, &local_err);
418 error_report_err(local_err);
421 opts = qemu_opts_create(list, id, 1, NULL);
425 if (sscanf(line, "[%63[^]]]", group) == 1) {
426 /* group without id */
427 list = find_list(lists, group, &local_err);
429 error_report_err(local_err);
432 opts = qemu_opts_create(list, NULL, 0, &error_abort);
437 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
438 sscanf(line, " %63s = \"\"", arg) == 1) {
441 error_report("no group defined");
444 qemu_opt_set(opts, arg, value, &local_err);
446 error_report_err(local_err);
451 error_report("parse error");
455 error_report("error reading file");
464 int qemu_read_config_file(const char *filename)
466 FILE *f = fopen(filename, "r");
473 ret = qemu_config_parse(f, vm_config_groups, filename);
478 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
484 Error *local_err = NULL;
485 size_t orig_size, enum_size;
488 prefix = g_strdup_printf("%s.", opts->name);
489 qdict_extract_subqdict(options, &subqdict, prefix);
491 orig_size = qdict_size(subqdict);
496 subopts = qemu_opts_create(opts, NULL, 0, &local_err);
498 error_propagate(errp, local_err);
502 qemu_opts_absorb_qdict(subopts, subqdict, &local_err);
504 error_propagate(errp, local_err);
508 enum_size = qdict_size(subqdict);
509 if (enum_size < orig_size && enum_size) {
510 error_setg(errp, "Unknown option '%s' for [%s]",
511 qdict_first(subqdict)->key, opts->name);
516 /* Multiple, enumerated sections */
517 QListEntry *list_entry;
520 /* Not required anymore */
521 qemu_opts_del(subopts);
523 qdict_array_split(subqdict, &list);
524 if (qdict_size(subqdict)) {
525 error_setg(errp, "Unused option '%s' for [%s]",
526 qdict_first(subqdict)->key, opts->name);
530 QLIST_FOREACH_ENTRY(list, list_entry) {
531 QDict *section = qobject_to(QDict, qlist_entry_obj(list_entry));
535 error_setg(errp, "[%s] section (index %u) does not consist of "
536 "keys", opts->name, i);
540 opt_name = g_strdup_printf("%s.%u", opts->name, i++);
541 subopts = qemu_opts_create(opts, opt_name, 1, &local_err);
544 error_propagate(errp, local_err);
548 qemu_opts_absorb_qdict(subopts, section, &local_err);
550 error_propagate(errp, local_err);
551 qemu_opts_del(subopts);
555 if (qdict_size(section)) {
556 error_setg(errp, "[%s] section doesn't support the option '%s'",
557 opts->name, qdict_first(section)->key);
558 qemu_opts_del(subopts);
565 qobject_unref(subqdict);
569 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
573 Error *local_err = NULL;
575 for (i = 0; lists[i]; i++) {
576 config_parse_qdict_section(options, lists[i], &local_err);
578 error_propagate(errp, local_err);