1#include "qemu/osdep.h"
2#include "block/qdict.h"
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-common.h"
8#include "qemu/error-report.h"
9#include "qemu/option.h"
10#include "qemu/config-file.h"
11
12static QemuOptsList *vm_config_groups[48];
13static QemuOptsList *drive_config_groups[5];
14
15static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
16 Error **errp)
17{
18 int i;
19
20 for (i = 0; lists[i] != NULL; i++) {
21 if (strcmp(lists[i]->name, group) == 0)
22 break;
23 }
24 if (lists[i] == NULL) {
25 error_setg(errp, "There is no option group '%s'", group);
26 }
27 return lists[i];
28}
29
30QemuOptsList *qemu_find_opts(const char *group)
31{
32 QemuOptsList *ret;
33 Error *local_err = NULL;
34
35 ret = find_list(vm_config_groups, group, &local_err);
36 if (local_err) {
37 error_report_err(local_err);
38 }
39
40 return ret;
41}
42
43QemuOpts *qemu_find_opts_singleton(const char *group)
44{
45 QemuOptsList *list;
46 QemuOpts *opts;
47
48 list = qemu_find_opts(group);
49 assert(list);
50 opts = qemu_opts_find(list, NULL);
51 if (!opts) {
52 opts = qemu_opts_create(list, NULL, 0, &error_abort);
53 }
54 return opts;
55}
56
57static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
58{
59 CommandLineParameterInfoList *param_list = NULL, *entry;
60 CommandLineParameterInfo *info;
61 int i;
62
63 for (i = 0; desc[i].name != NULL; i++) {
64 info = g_malloc0(sizeof(*info));
65 info->name = g_strdup(desc[i].name);
66
67 switch (desc[i].type) {
68 case QEMU_OPT_STRING:
69 info->type = COMMAND_LINE_PARAMETER_TYPE_STRING;
70 break;
71 case QEMU_OPT_BOOL:
72 info->type = COMMAND_LINE_PARAMETER_TYPE_BOOLEAN;
73 break;
74 case QEMU_OPT_NUMBER:
75 info->type = COMMAND_LINE_PARAMETER_TYPE_NUMBER;
76 break;
77 case QEMU_OPT_SIZE:
78 info->type = COMMAND_LINE_PARAMETER_TYPE_SIZE;
79 break;
80 }
81
82 if (desc[i].help) {
83 info->has_help = true;
84 info->help = g_strdup(desc[i].help);
85 }
86 if (desc[i].def_value_str) {
87 info->has_q_default = true;
88 info->q_default = g_strdup(desc[i].def_value_str);
89 }
90
91 entry = g_malloc0(sizeof(*entry));
92 entry->value = info;
93 entry->next = param_list;
94 param_list = entry;
95 }
96
97 return param_list;
98}
99
100
101static void cleanup_infolist(CommandLineParameterInfoList *head)
102{
103 CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
104
105 cur = head;
106 while (cur->next) {
107 pre_entry = head;
108 while (pre_entry != cur->next) {
109 if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
110 del_entry = cur->next;
111 cur->next = cur->next->next;
112 del_entry->next = NULL;
113 qapi_free_CommandLineParameterInfoList(del_entry);
114 break;
115 }
116 pre_entry = pre_entry->next;
117 }
118 cur = cur->next;
119 }
120}
121
122
123static void connect_infolist(CommandLineParameterInfoList *head,
124 CommandLineParameterInfoList *new)
125{
126 CommandLineParameterInfoList *cur;
127
128 cur = head;
129 while (cur->next) {
130 cur = cur->next;
131 }
132 cur->next = new;
133}
134
135
136static CommandLineParameterInfoList *get_drive_infolist(void)
137{
138 CommandLineParameterInfoList *head = NULL, *cur;
139 int i;
140
141 for (i = 0; drive_config_groups[i] != NULL; i++) {
142 if (!head) {
143 head = query_option_descs(drive_config_groups[i]->desc);
144 } else {
145 cur = query_option_descs(drive_config_groups[i]->desc);
146 connect_infolist(head, cur);
147 }
148 }
149 cleanup_infolist(head);
150
151 return head;
152}
153
154
155static QemuOptsList machine_opts = {
156 .merge_lists = true,
157 .head = QTAILQ_HEAD_INITIALIZER(machine_opts.head),
158 .desc = {
159 {
160 .name = "type",
161 .type = QEMU_OPT_STRING,
162 .help = "emulated machine"
163 },{
164 .name = "accel",
165 .type = QEMU_OPT_STRING,
166 .help = "accelerator list",
167 },{
168 .name = "kernel_irqchip",
169 .type = QEMU_OPT_BOOL,
170 .help = "use KVM in-kernel irqchip",
171 },{
172 .name = "kvm_shadow_mem",
173 .type = QEMU_OPT_SIZE,
174 .help = "KVM shadow MMU size",
175 },{
176 .name = "kernel",
177 .type = QEMU_OPT_STRING,
178 .help = "Linux kernel image file",
179 },{
180 .name = "initrd",
181 .type = QEMU_OPT_STRING,
182 .help = "Linux initial ramdisk file",
183 },{
184 .name = "append",
185 .type = QEMU_OPT_STRING,
186 .help = "Linux kernel command line",
187 },{
188 .name = "dtb",
189 .type = QEMU_OPT_STRING,
190 .help = "Linux kernel device tree file",
191 },{
192 .name = "dumpdtb",
193 .type = QEMU_OPT_STRING,
194 .help = "Dump current dtb to a file and quit",
195 },{
196 .name = "phandle_start",
197 .type = QEMU_OPT_NUMBER,
198 .help = "The first phandle ID we may generate dynamically",
199 },{
200 .name = "dt_compatible",
201 .type = QEMU_OPT_STRING,
202 .help = "Overrides the \"compatible\" property of the dt root node",
203 },{
204 .name = "dump-guest-core",
205 .type = QEMU_OPT_BOOL,
206 .help = "Include guest memory in a core dump",
207 },{
208 .name = "mem-merge",
209 .type = QEMU_OPT_BOOL,
210 .help = "enable/disable memory merge support",
211 },{
212 .name = "usb",
213 .type = QEMU_OPT_BOOL,
214 .help = "Set on/off to enable/disable usb",
215 },{
216 .name = "firmware",
217 .type = QEMU_OPT_STRING,
218 .help = "firmware image",
219 },{
220 .name = "iommu",
221 .type = QEMU_OPT_BOOL,
222 .help = "Set on/off to enable/disable Intel IOMMU (VT-d)",
223 },{
224 .name = "suppress-vmdesc",
225 .type = QEMU_OPT_BOOL,
226 .help = "Set on to disable self-describing migration",
227 },{
228 .name = "aes-key-wrap",
229 .type = QEMU_OPT_BOOL,
230 .help = "enable/disable AES key wrapping using the CPACF wrapping key",
231 },{
232 .name = "dea-key-wrap",
233 .type = QEMU_OPT_BOOL,
234 .help = "enable/disable DEA key wrapping using the CPACF wrapping key",
235 },{
236 .name = "loadparm",
237 .type = QEMU_OPT_STRING,
238 .help = "Up to 8 chars in set of [A-Za-z0-9. ](lower case chars"
239 " converted to upper case) to pass to machine"
240 " loader, boot manager, and guest kernel",
241 },
242 { }
243 }
244};
245
246CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
247 const char *option,
248 Error **errp)
249{
250 CommandLineOptionInfoList *conf_list = NULL, *entry;
251 CommandLineOptionInfo *info;
252 int i;
253
254 for (i = 0; vm_config_groups[i] != NULL; i++) {
255 if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
256 info = g_malloc0(sizeof(*info));
257 info->option = g_strdup(vm_config_groups[i]->name);
258 if (!strcmp("drive", vm_config_groups[i]->name)) {
259 info->parameters = get_drive_infolist();
260 } else if (!strcmp("machine", vm_config_groups[i]->name)) {
261 info->parameters = query_option_descs(machine_opts.desc);
262 } else {
263 info->parameters =
264 query_option_descs(vm_config_groups[i]->desc);
265 }
266 entry = g_malloc0(sizeof(*entry));
267 entry->value = info;
268 entry->next = conf_list;
269 conf_list = entry;
270 }
271 }
272
273 if (conf_list == NULL) {
274 error_setg(errp, "invalid option name: %s", option);
275 }
276
277 return conf_list;
278}
279
280QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
281{
282 return find_list(vm_config_groups, group, errp);
283}
284
285void qemu_add_drive_opts(QemuOptsList *list)
286{
287 int entries, i;
288
289 entries = ARRAY_SIZE(drive_config_groups);
290 entries--;
291 for (i = 0; i < entries; i++) {
292 if (drive_config_groups[i] == NULL) {
293 drive_config_groups[i] = list;
294 return;
295 }
296 }
297 fprintf(stderr, "ran out of space in drive_config_groups");
298 abort();
299}
300
301void qemu_add_opts(QemuOptsList *list)
302{
303 int entries, i;
304
305 entries = ARRAY_SIZE(vm_config_groups);
306 entries--;
307 for (i = 0; i < entries; i++) {
308 if (vm_config_groups[i] == NULL) {
309 vm_config_groups[i] = list;
310 return;
311 }
312 }
313 fprintf(stderr, "ran out of space in vm_config_groups");
314 abort();
315}
316
317int qemu_set_option(const char *str)
318{
319 Error *local_err = NULL;
320 char group[64], id[64], arg[64];
321 QemuOptsList *list;
322 QemuOpts *opts;
323 int rc, offset;
324
325 rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
326 if (rc < 3 || str[offset] != '=') {
327 error_report("can't parse: \"%s\"", str);
328 return -1;
329 }
330
331 list = qemu_find_opts(group);
332 if (list == NULL) {
333 return -1;
334 }
335
336 opts = qemu_opts_find(list, id);
337 if (!opts) {
338 error_report("there is no %s \"%s\" defined",
339 list->name, id);
340 return -1;
341 }
342
343 qemu_opt_set(opts, arg, str + offset + 1, &local_err);
344 if (local_err) {
345 error_report_err(local_err);
346 return -1;
347 }
348 return 0;
349}
350
351struct ConfigWriteData {
352 QemuOptsList *list;
353 FILE *fp;
354};
355
356static int config_write_opt(void *opaque, const char *name, const char *value,
357 Error **errp)
358{
359 struct ConfigWriteData *data = opaque;
360
361 fprintf(data->fp, " %s = \"%s\"\n", name, value);
362 return 0;
363}
364
365static int config_write_opts(void *opaque, QemuOpts *opts, Error **errp)
366{
367 struct ConfigWriteData *data = opaque;
368 const char *id = qemu_opts_id(opts);
369
370 if (id) {
371 fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
372 } else {
373 fprintf(data->fp, "[%s]\n", data->list->name);
374 }
375 qemu_opt_foreach(opts, config_write_opt, data, NULL);
376 fprintf(data->fp, "\n");
377 return 0;
378}
379
380void qemu_config_write(FILE *fp)
381{
382 struct ConfigWriteData data = { .fp = fp };
383 QemuOptsList **lists = vm_config_groups;
384 int i;
385
386 fprintf(fp, "# qemu config file\n\n");
387 for (i = 0; lists[i] != NULL; i++) {
388 data.list = lists[i];
389 qemu_opts_foreach(data.list, config_write_opts, &data, NULL);
390 }
391}
392
393
394int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
395{
396 char line[1024], group[64], id[64], arg[64], value[1024];
397 Location loc;
398 QemuOptsList *list = NULL;
399 Error *local_err = NULL;
400 QemuOpts *opts = NULL;
401 int res = -EINVAL, lno = 0;
402 int count = 0;
403
404 loc_push_none(&loc);
405 while (fgets(line, sizeof(line), fp) != NULL) {
406 loc_set_file(fname, ++lno);
407 if (line[0] == '\n') {
408
409 continue;
410 }
411 if (line[0] == '#') {
412
413 continue;
414 }
415 if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
416
417 list = find_list(lists, group, &local_err);
418 if (local_err) {
419 error_report_err(local_err);
420 goto out;
421 }
422 opts = qemu_opts_create(list, id, 1, NULL);
423 count++;
424 continue;
425 }
426 if (sscanf(line, "[%63[^]]]", group) == 1) {
427
428 list = find_list(lists, group, &local_err);
429 if (local_err) {
430 error_report_err(local_err);
431 goto out;
432 }
433 opts = qemu_opts_create(list, NULL, 0, &error_abort);
434 count++;
435 continue;
436 }
437 value[0] = '\0';
438 if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2 ||
439 sscanf(line, " %63s = \"\"", arg) == 1) {
440
441 if (opts == NULL) {
442 error_report("no group defined");
443 goto out;
444 }
445 qemu_opt_set(opts, arg, value, &local_err);
446 if (local_err) {
447 error_report_err(local_err);
448 goto out;
449 }
450 continue;
451 }
452 error_report("parse error");
453 goto out;
454 }
455 if (ferror(fp)) {
456 error_report("error reading file");
457 goto out;
458 }
459 res = count;
460out:
461 loc_pop(&loc);
462 return res;
463}
464
465int qemu_read_config_file(const char *filename)
466{
467 FILE *f = fopen(filename, "r");
468 int ret;
469
470 if (f == NULL) {
471 return -errno;
472 }
473
474 ret = qemu_config_parse(f, vm_config_groups, filename);
475 fclose(f);
476 return ret;
477}
478
479static void config_parse_qdict_section(QDict *options, QemuOptsList *opts,
480 Error **errp)
481{
482 QemuOpts *subopts;
483 QDict *subqdict;
484 QList *list = NULL;
485 Error *local_err = NULL;
486 size_t orig_size, enum_size;
487 char *prefix;
488
489 prefix = g_strdup_printf("%s.", opts->name);
490 qdict_extract_subqdict(options, &subqdict, prefix);
491 g_free(prefix);
492 orig_size = qdict_size(subqdict);
493 if (!orig_size) {
494 goto out;
495 }
496
497 subopts = qemu_opts_create(opts, NULL, 0, &local_err);
498 if (local_err) {
499 error_propagate(errp, local_err);
500 goto out;
501 }
502
503 qemu_opts_absorb_qdict(subopts, subqdict, &local_err);
504 if (local_err) {
505 error_propagate(errp, local_err);
506 goto out;
507 }
508
509 enum_size = qdict_size(subqdict);
510 if (enum_size < orig_size && enum_size) {
511 error_setg(errp, "Unknown option '%s' for [%s]",
512 qdict_first(subqdict)->key, opts->name);
513 goto out;
514 }
515
516 if (enum_size) {
517
518 QListEntry *list_entry;
519 unsigned i = 0;
520
521
522 qemu_opts_del(subopts);
523
524 qdict_array_split(subqdict, &list);
525 if (qdict_size(subqdict)) {
526 error_setg(errp, "Unused option '%s' for [%s]",
527 qdict_first(subqdict)->key, opts->name);
528 goto out;
529 }
530
531 QLIST_FOREACH_ENTRY(list, list_entry) {
532 QDict *section = qobject_to(QDict, qlist_entry_obj(list_entry));
533 char *opt_name;
534
535 if (!section) {
536 error_setg(errp, "[%s] section (index %u) does not consist of "
537 "keys", opts->name, i);
538 goto out;
539 }
540
541 opt_name = g_strdup_printf("%s.%u", opts->name, i++);
542 subopts = qemu_opts_create(opts, opt_name, 1, &local_err);
543 g_free(opt_name);
544 if (local_err) {
545 error_propagate(errp, local_err);
546 goto out;
547 }
548
549 qemu_opts_absorb_qdict(subopts, section, &local_err);
550 if (local_err) {
551 error_propagate(errp, local_err);
552 qemu_opts_del(subopts);
553 goto out;
554 }
555
556 if (qdict_size(section)) {
557 error_setg(errp, "[%s] section doesn't support the option '%s'",
558 opts->name, qdict_first(section)->key);
559 qemu_opts_del(subopts);
560 goto out;
561 }
562 }
563 }
564
565out:
566 qobject_unref(subqdict);
567 qobject_unref(list);
568}
569
570void qemu_config_parse_qdict(QDict *options, QemuOptsList **lists,
571 Error **errp)
572{
573 int i;
574 Error *local_err = NULL;
575
576 for (i = 0; lists[i]; i++) {
577 config_parse_qdict_section(options, lists[i], &local_err);
578 if (local_err) {
579 error_propagate(errp, local_err);
580 return;
581 }
582 }
583}
584
