qapi: Use QAPI_LIST_PREPEND() where possible
[qemu/ar7.git] / util / qemu-config.c
blobe2a700b28450ab252a63dc6f760a2202ea4ef508
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,
15 Error **errp)
17 int i;
19 for (i = 0; lists[i] != NULL; i++) {
20 if (strcmp(lists[i]->name, group) == 0)
21 break;
23 if (lists[i] == NULL) {
24 error_setg(errp, "There is no option group '%s'", group);
26 return lists[i];
29 QemuOptsList *qemu_find_opts(const char *group)
31 QemuOptsList *ret;
32 Error *local_err = NULL;
34 ret = find_list(vm_config_groups, group, &local_err);
35 if (local_err) {
36 error_report_err(local_err);
39 return ret;
42 QemuOpts *qemu_find_opts_singleton(const char *group)
44 QemuOptsList *list;
45 QemuOpts *opts;
47 list = qemu_find_opts(group);
48 assert(list);
49 opts = qemu_opts_find(list, NULL);
50 if (!opts) {
51 opts = qemu_opts_create(list, NULL, 0, &error_abort);
53 return opts;
56 static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
58 CommandLineParameterInfoList *param_list = NULL;
59 CommandLineParameterInfo *info;
60 int i;
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) {
67 case QEMU_OPT_STRING:
68 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
69 break;
70 case QEMU_OPT_BOOL:
71 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
72 break;
73 case QEMU_OPT_NUMBER:
74 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
75 break;
76 case QEMU_OPT_SIZE:
77 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
78 break;
81 if (desc[i].help) {
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 QAPI_LIST_PREPEND(param_list, info);
93 return param_list;
96 /* remove repeated entry from the info list */
97 static void cleanup_infolist(CommandLineParameterInfoList *head)
99 CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
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 del_entry->next = NULL;
109 qapi_free_CommandLineParameterInfoList(del_entry);
110 break;
112 pre_entry = pre_entry->next;
114 cur = cur->next;
118 /* merge the description items of two parameter infolists */
119 static void connect_infolist(CommandLineParameterInfoList *head,
120 CommandLineParameterInfoList *new)
122 CommandLineParameterInfoList *cur;
124 cur = head;
125 while (cur->next) {
126 cur = cur->next;
128 cur->next = new;
131 /* access all the local QemuOptsLists for drive option */
132 static CommandLineParameterInfoList *get_drive_infolist(void)
134 CommandLineParameterInfoList *head = NULL, *cur;
135 int i;
137 for (i = 0; drive_config_groups[i] != NULL; i++) {
138 if (!head) {
139 head = query_option_descs(drive_config_groups[i]->desc);
140 } else {
141 cur = query_option_descs(drive_config_groups[i]->desc);
142 connect_infolist(head, cur);
145 cleanup_infolist(head);
147 return head;
150 /* restore machine options that are now machine's properties */
151 static QemuOptsList machine_opts = {
152 .merge_lists = true,
153 .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head),
154 .desc = {
156 .name = "type",
157 .type = QEMU_OPT_STRING,
158 .help = "emulated machine"
160 .name = "accel",
161 .type = QEMU_OPT_STRING,
162 .help = "accelerator list",
164 .name = "kernel_irqchip",
165 .type = QEMU_OPT_BOOL,
166 .help = "use KVM in-kernel irqchip",
168 .name = "kvm_shadow_mem",
169 .type = QEMU_OPT_SIZE,
170 .help = "KVM shadow MMU size",
172 .name = "kernel",
173 .type = QEMU_OPT_STRING,
174 .help = "Linux kernel image file",
176 .name = "initrd",
177 .type = QEMU_OPT_STRING,
178 .help = "Linux initial ramdisk file",
180 .name = "append",
181 .type = QEMU_OPT_STRING,
182 .help = "Linux kernel command line",
184 .name = "dtb",
185 .type = QEMU_OPT_STRING,
186 .help = "Linux kernel device tree file",
188 .name = "dumpdtb",
189 .type = QEMU_OPT_STRING,
190 .help = "Dump current dtb to a file and quit",
192 .name = "phandle_start",
193 .type = QEMU_OPT_NUMBER,
194 .help = "The first phandle ID we may generate dynamically",
196 .name = "dt_compatible",
197 .type = QEMU_OPT_STRING,
198 .help = "Overrides the \"compatible\" property of the dt root node",
200 .name = "dump-guest-core",
201 .type = QEMU_OPT_BOOL,
202 .help = "Include guest memory in a core dump",
204 .name = "mem-merge",
205 .type = QEMU_OPT_BOOL,
206 .help = "enable/disable memory merge support",
208 .name = "usb",
209 .type = QEMU_OPT_BOOL,
210 .help = "Set on/off to enable/disable usb",
212 .name = "firmware",
213 .type = QEMU_OPT_STRING,
214 .help = "firmware image",
216 .name = "iommu",
217 .type = QEMU_OPT_BOOL,
218 .help = "Set on/off to enable/disable Intel IOMMU (VT-d)",
220 .name = "suppress-vmdesc",
221 .type = QEMU_OPT_BOOL,
222 .help = "Set on to disable self-describing migration",
224 .name = "aes-key-wrap",
225 .type = QEMU_OPT_BOOL,
226 .help = "enable/disable AES key wrapping using the CPACF wrapping key",
228 .name = "dea-key-wrap",
229 .type = QEMU_OPT_BOOL,
230 .help = "enable/disable DEA key wrapping using the CPACF wrapping key",
232 .name = "loadparm",
233 .type = QEMU_OPT_STRING,
234 .help = "Up to 8 chars in set of [A-Za-z0-9. ](lower case chars"
235 " converted to upper case) to pass to machine"
236 " loader, boot manager, and guest kernel",
238 { /* End of list */ }
242 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
243 const char *option,
244 Error **errp)
246 CommandLineOptionInfoList *conf_list = NULL;
247 CommandLineOptionInfo *info;
248 int i;
250 for (i = 0; vm_config_groups[i] != NULL; i++) {
251 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
252 info = g_malloc0(sizeof(*info));
253 info->option = g_strdup(vm_config_groups[i]->name);
254 if (!strcmp("drive", vm_config_groups[i]->name)) {
255 info->parameters = get_drive_infolist();
256 } else if (!strcmp("machine", vm_config_groups[i]->name)) {
257 info->parameters = query_option_descs(machine_opts.desc);
258 } else {
259 info->parameters =
260 query_option_descs(vm_config_groups[i]->desc);
262 QAPI_LIST_PREPEND(conf_list, info);
266 if (conf_list == NULL) {
267 error_setg(errp, "invalid option name: %s", option);
270 return conf_list;
273 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
275 return find_list(vm_config_groups, group, errp);
278 void qemu_add_drive_opts(QemuOptsList *list)
280 int entries, i;
282 entries = ARRAY_SIZE(drive_config_groups);
283 entries--; /* keep list NULL terminated */
284 for (i = 0; i < entries; i++) {
285 if (drive_config_groups[i] == NULL) {
286 drive_config_groups[i] = list;
287 return;
290 fprintf(stderr, "ran out of space in drive_config_groups");
291 abort();
294 void qemu_add_opts(QemuOptsList *list)
296 int entries, i;
298 entries = ARRAY_SIZE(vm_config_groups);
299 entries--; /* keep list NULL terminated */
300 for (i = 0; i < entries; i++) {
301 if (vm_config_groups[i] == NULL) {
302 vm_config_groups[i] = list;
303 return;
306 fprintf(stderr, "ran out of space in vm_config_groups");
307 abort();
310 struct ConfigWriteData {
311 QemuOptsList *list;
312 FILE *fp;
315 static int config_write_opt(void *opaque, const char *name, const char *value,
316 Error **errp)
318 struct ConfigWriteData *data = opaque;
320 fprintf(data->fp, " %s = \"%s\"\n", name, value);
321 return 0;
324 static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp)
326 struct ConfigWriteData *data = opaque;
327 const char *id = qemu_opts_id(opts);
329 if (id) {
330 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
331 } else {
332 fprintf(data->fp, "[%s]\n", data->list->name);
334 qemu_opt_foreach(opts, config_write_opt, data, NULL);
335 fprintf(data->fp, "\n");
336 return 0;
339 void qemu_config_write(FILE *fp)
341 struct ConfigWriteData data = { .fp = fp };
342 QemuOptsList **lists = vm_config_groups;
343 int i;
345 fprintf(fp, "# qemu config file\n\n");
346 for (i = 0; lists[i] != NULL; i++) {
347 data.list = lists[i];
348 qemu_opts_foreach(data.list, config_write_opts, &data, NULL);
352 /* Returns number of config groups on success, -errno on error */
353 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
355 char line[1024], group[64], id[64], arg[64], value[1024];
356 Location loc;
357 QemuOptsList *list = NULL;
358 Error *local_err = NULL;
359 QemuOpts *opts = NULL;
360 int res = -EINVAL, lno = 0;
361 int count = 0;
363 loc_push_none(&loc);
364 while (fgets(line, sizeof(line), fp) != NULL) {
365 loc_set_file(fname, ++lno);
366 if (line[0] == '\n') {
367 /* skip empty lines */
368 continue;
370 if (line[0] == '#') {
371 /* comment */
372 continue;
374 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
375 /* group with id */
376 list = find_list(lists, group, &local_err);
377 if (local_err) {
378 error_report_err(local_err);
379 goto out;
381 opts = qemu_opts_create(list, id, 1, NULL);
382 count++;
383 continue;
385 if (sscanf(line, "[%63[^]]]", group) == 1) {
386 /* group without id */
387 list = find_list(lists, group, &local_err);
388 if (local_err) {
389 error_report_err(local_err);
390 goto out;
392 opts = qemu_opts_create(list, NULL, 0, &error_abort);
393 count++;
394 continue;
396 value[0] = '\0';
397 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
398 sscanf(line, " %63s = \"\"", arg) == 1) {
399 /* arg = value */
400 if (opts == NULL) {
401 error_report("no group defined");
402 goto out;
404 if (!qemu_opt_set(opts, arg, value, &local_err)) {
405 error_report_err(local_err);
406 goto out;
408 continue;
410 error_report("parse error");
411 goto out;
413 if (ferror(fp)) {
414 error_report("error reading file");
415 goto out;
417 res = count;
418 out:
419 loc_pop(&loc);
420 return res;
423 int qemu_read_config_file(const char *filename)
425 FILE *f = fopen(filename, "r");
426 int ret;
428 if (f == NULL) {
429 return -errno;
432 ret = qemu_config_parse(f, vm_config_groups, filename);
433 fclose(f);
434 return ret;
437 static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
438 Error **errp)
440 QemuOpts *subopts;
441 QDict *subqdict;
442 QList *list = NULL;
443 size_t orig_size, enum_size;
444 char *prefix;
446 prefix = g_strdup_printf("%s.", opts->name);
447 qdict_extract_subqdict(options, &subqdict, prefix);
448 g_free(prefix);
449 orig_size = qdict_size(subqdict);
450 if (!orig_size) {
451 goto out;
454 subopts = qemu_opts_create(opts, NULL, 0, errp);
455 if (!subopts) {
456 goto out;
459 if (!qemu_opts_absorb_qdict(subopts, subqdict, errp)) {
460 goto out;
463 enum_size = qdict_size(subqdict);
464 if (enum_size < orig_size && enum_size) {
465 error_setg(errp, "Unknown option '%s' for [%s]",
466 qdict_first(subqdict)->key, opts->name);
467 goto out;
470 if (enum_size) {
471 /* Multiple, enumerated sections */
472 QListEntry *list_entry;
473 unsigned i = 0;
475 /* Not required anymore */
476 qemu_opts_del(subopts);
478 qdict_array_split(subqdict, &list);
479 if (qdict_size(subqdict)) {
480 error_setg(errp, "Unused option '%s' for [%s]",
481 qdict_first(subqdict)->key, opts->name);
482 goto out;
485 QLIST_FOREACH_ENTRY(list, list_entry) {
486 QDict *section = qobject_to(QDict, qlist_entry_obj(list_entry));
487 char *opt_name;
489 if (!section) {
490 error_setg(errp, "[%s] section (index %u) does not consist of "
491 "keys", opts->name, i);
492 goto out;
495 opt_name = g_strdup_printf("%s.%u", opts->name, i++);
496 subopts = qemu_opts_create(opts, opt_name, 1, errp);
497 g_free(opt_name);
498 if (!subopts) {
499 goto out;
502 if (!qemu_opts_absorb_qdict(subopts, section, errp)) {
503 qemu_opts_del(subopts);
504 goto out;
507 if (qdict_size(section)) {
508 error_setg(errp, "[%s] section doesn't support the option '%s'",
509 opts->name, qdict_first(section)->key);
510 qemu_opts_del(subopts);
511 goto out;
516 out:
517 qobject_unref(subqdict);
518 qobject_unref(list);
521 void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
522 Error **errp)
524 int i;
525 Error *local_err = NULL;
527 for (i = 0; lists[i]; i++) {
528 config_parse_qdict_section(options, lists[i], &local_err);
529 if (local_err) {
530 error_propagate(errp, local_err);
531 return;