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"
7
8static QemuOptsList *vm_config_groups[48];
9static QemuOptsList *drive_config_groups[5];
10
11static 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
26QemuOptsList *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
39QemuOpts *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
53static 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
97static 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
118static 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
131static 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
150static 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 .name = "aes-key-wrap",
224 .type = QEMU_OPT_BOOL,
225 .help = "enable/disable AES key wrapping using the CPACF wrapping key",
226 },{
227 .name = "dea-key-wrap",
228 .type = QEMU_OPT_BOOL,
229 .help = "enable/disable DEA key wrapping using the CPACF wrapping key",
230 },{
231 .name = "loadparm",
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",
236 },
237 { }
238 }
239};
240
241CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
242 const char *option,
243 Error **errp)
244{
245 CommandLineOptionInfoList *conf_list = NULL, *entry;
246 CommandLineOptionInfo *info;
247 int i;
248
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);
257 } else {
258 info->parameters =
259 query_option_descs(vm_config_groups[i]->desc);
260 }
261 entry = g_malloc0(sizeof(*entry));
262 entry->value = info;
263 entry->next = conf_list;
264 conf_list = entry;
265 }
266 }
267
268 if (conf_list == NULL) {
269 error_setg(errp, "invalid option name: %s", option);
270 }
271
272 return conf_list;
273}
274
275QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
276{
277 return find_list(vm_config_groups, group, errp);
278}
279
280void qemu_add_drive_opts(QemuOptsList *list)
281{
282 int entries, i;
283
284 entries = ARRAY_SIZE(drive_config_groups);
285 entries--;
286 for (i = 0; i < entries; i++) {
287 if (drive_config_groups[i] == NULL) {
288 drive_config_groups[i] = list;
289 return;
290 }
291 }
292 fprintf(stderr, "ran out of space in drive_config_groups");
293 abort();
294}
295
296void qemu_add_opts(QemuOptsList *list)
297{
298 int entries, i;
299
300 entries = ARRAY_SIZE(vm_config_groups);
301 entries--;
302 for (i = 0; i < entries; i++) {
303 if (vm_config_groups[i] == NULL) {
304 vm_config_groups[i] = list;
305 return;
306 }
307 }
308 fprintf(stderr, "ran out of space in vm_config_groups");
309 abort();
310}
311
312int qemu_set_option(const char *str)
313{
314 Error *local_err = NULL;
315 char group[64], id[64], arg[64];
316 QemuOptsList *list;
317 QemuOpts *opts;
318 int rc, offset;
319
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);
323 return -1;
324 }
325
326 list = qemu_find_opts(group);
327 if (list == NULL) {
328 return -1;
329 }
330
331 opts = qemu_opts_find(list, id);
332 if (!opts) {
333 error_report("there is no %s \"%s\" defined",
334 list->name, id);
335 return -1;
336 }
337
338 qemu_opt_set(opts, arg, str + offset + 1, &local_err);
339 if (local_err) {
340 error_report_err(local_err);
341 return -1;
342 }
343 return 0;
344}
345
346struct ConfigWriteData {
347 QemuOptsList *list;
348 FILE *fp;
349};
350
351static int config_write_opt(void *opaque, const char *name, const char *value,
352 Error **errp)
353{
354 struct ConfigWriteData *data = opaque;
355
356 fprintf(data->fp, " %s = \"%s\"\n", name, value);
357 return 0;
358}
359
360static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp)
361{
362 struct ConfigWriteData *data = opaque;
363 const char *id = qemu_opts_id(opts);
364
365 if (id) {
366 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
367 } else {
368 fprintf(data->fp, "[%s]\n", data->list->name);
369 }
370 qemu_opt_foreach(opts, config_write_opt, data, NULL);
371 fprintf(data->fp, "\n");
372 return 0;
373}
374
375void qemu_config_write(FILE *fp)
376{
377 struct ConfigWriteData data = { .fp = fp };
378 QemuOptsList **lists = vm_config_groups;
379 int i;
380
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);
385 }
386}
387
388
389int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
390{
391 char line[1024], group[64], id[64], arg[64], value[1024];
392 Location loc;
393 QemuOptsList *list = NULL;
394 Error *local_err = NULL;
395 QemuOpts *opts = NULL;
396 int res = -EINVAL, lno = 0;
397 int count = 0;
398
399 loc_push_none(&loc);
400 while (fgets(line, sizeof(line), fp) != NULL) {
401 loc_set_file(fname, ++lno);
402 if (line[0] == '\n') {
403
404 continue;
405 }
406 if (line[0] == '#') {
407
408 continue;
409 }
410 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
411
412 list = find_list(lists, group, &local_err);
413 if (local_err) {
414 error_report_err(local_err);
415 goto out;
416 }
417 opts = qemu_opts_create(list, id, 1, NULL);
418 count++;
419 continue;
420 }
421 if (sscanf(line, "[%63[^]]]", group) == 1) {
422
423 list = find_list(lists, group, &local_err);
424 if (local_err) {
425 error_report_err(local_err);
426 goto out;
427 }
428 opts = qemu_opts_create(list, NULL, 0, &error_abort);
429 count++;
430 continue;
431 }
432 value[0] = '\0';
433 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
434 sscanf(line, " %63s = \"\"", arg) == 1) {
435
436 if (opts == NULL) {
437 error_report("no group defined");
438 goto out;
439 }
440 qemu_opt_set(opts, arg, value, &local_err);
441 if (local_err) {
442 error_report_err(local_err);
443 goto out;
444 }
445 continue;
446 }
447 error_report("parse error");
448 goto out;
449 }
450 if (ferror(fp)) {
451 error_report("error reading file");
452 goto out;
453 }
454 res = count;
455out:
456 loc_pop(&loc);
457 return res;
458}
459
460int qemu_read_config_file(const char *filename)
461{
462 FILE *f = fopen(filename, "r");
463 int ret;
464
465 if (f == NULL) {
466 return -errno;
467 }
468
469 ret = qemu_config_parse(f, vm_config_groups, filename);
470 fclose(f);
471 return ret;
472}
473
474static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
475 Error **errp)
476{
477 QemuOpts *subopts;
478 QDict *subqdict;
479 QList *list = NULL;
480 Error *local_err = NULL;
481 size_t orig_size, enum_size;
482 char *prefix;
483
484 prefix = g_strdup_printf("%s.", opts->name);
485 qdict_extract_subqdict(options, &subqdict, prefix);
486 g_free(prefix);
487 orig_size = qdict_size(subqdict);
488 if (!orig_size) {
489 goto out;
490 }
491
492 subopts = qemu_opts_create(opts, NULL, 0, &local_err);
493 if (local_err) {
494 error_propagate(errp, local_err);
495 goto out;
496 }
497
498 qemu_opts_absorb_qdict(subopts, subqdict, &local_err);
499 if (local_err) {
500 error_propagate(errp, local_err);
501 goto out;
502 }
503
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);
508 goto out;
509 }
510
511 if (enum_size) {
512
513 QListEntry *list_entry;
514 unsigned i = 0;
515
516
517 qemu_opts_del(subopts);
518
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);
523 goto out;
524 }
525
526 QLIST_FOREACH_ENTRY(list, list_entry) {
527 QDict *section = qobject_to_qdict(qlist_entry_obj(list_entry));
528 char *opt_name;
529
530 if (!section) {
531 error_setg(errp, "[%s] section (index %u) does not consist of "
532 "keys", opts->name, i);
533 goto out;
534 }
535
536 opt_name = g_strdup_printf("%s.%u", opts->name, i++);
537 subopts = qemu_opts_create(opts, opt_name, 1, &local_err);
538 g_free(opt_name);
539 if (local_err) {
540 error_propagate(errp, local_err);
541 goto out;
542 }
543
544 qemu_opts_absorb_qdict(subopts, section, &local_err);
545 if (local_err) {
546 error_propagate(errp, local_err);
547 qemu_opts_del(subopts);
548 goto out;
549 }
550
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);
555 goto out;
556 }
557 }
558 }
559
560out:
561 QDECREF(subqdict);
562 QDECREF(list);
563}
564
565void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
566 Error **errp)
567{
568 int i;
569 Error *local_err = NULL;
570
571 for (i = 0; lists[i]; i++) {
572 config_parse_qdict_section(options, lists[i], &local_err);
573 if (local_err) {
574 error_propagate(errp, local_err);
575 return;
576 }
577 }
578}
579
