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