qemu-config.c

   1 #include "qemu-common.h"
   2 #include "qemu-error.h"
   3 #include "qemu-option.h"
   4 #include "qemu-config.h"
   5 #include "sysemu.h"
   6 #include "hw/qdev.h"
   7
   8 QemuOptsList qemu_drive_opts = {
   9     .name = "drive",
  10     .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
  11     .desc = {
  12         {
  13             .name = "bus",
  14             .type = QEMU_OPT_NUMBER,
  15             .help = "bus number",
  16         },{
  17             .name = "unit",
  18             .type = QEMU_OPT_NUMBER,
  19             .help = "unit number (i.e. lun for scsi)",
  20         },{
  21             .name = "if",
  22             .type = QEMU_OPT_STRING,
  23             .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
  24         },{
  25             .name = "index",
  26             .type = QEMU_OPT_NUMBER,
  27         },{
  28             .name = "cyls",
  29             .type = QEMU_OPT_NUMBER,
  30             .help = "number of cylinders (ide disk geometry)",
  31         },{
  32             .name = "heads",
  33             .type = QEMU_OPT_NUMBER,
  34             .help = "number of heads (ide disk geometry)",
  35         },{
  36             .name = "secs",
  37             .type = QEMU_OPT_NUMBER,
  38             .help = "number of sectors (ide disk geometry)",
  39         },{
  40             .name = "trans",
  41             .type = QEMU_OPT_STRING,
  42             .help = "chs translation (auto, lba. none)",
  43         },{
  44             .name = "media",
  45             .type = QEMU_OPT_STRING,
  46             .help = "media type (disk, cdrom)",
  47         },{
  48             .name = "snapshot",
  49             .type = QEMU_OPT_BOOL,
  50         },{
  51             .name = "file",
  52             .type = QEMU_OPT_STRING,
  53             .help = "disk image",
  54         },{
  55             .name = "cache",
  56             .type = QEMU_OPT_STRING,
  57             .help = "host cache usage (none, writeback, writethrough)",
  58         },{
  59             .name = "aio",
  60             .type = QEMU_OPT_STRING,
  61             .help = "host AIO implementation (threads, native)",
  62         },{
  63             .name = "format",
  64             .type = QEMU_OPT_STRING,
  65             .help = "disk format (raw, qcow2, ...)",
  66         },{
  67             .name = "serial",
  68             .type = QEMU_OPT_STRING,
  69         },{
  70             .name = "rerror",
  71             .type = QEMU_OPT_STRING,
  72         },{
  73             .name = "werror",
  74             .type = QEMU_OPT_STRING,
  75         },{
  76             .name = "addr",
  77             .type = QEMU_OPT_STRING,
  78             .help = "pci address (virtio only)",
  79         },{
  80             .name = "readonly",
  81             .type = QEMU_OPT_BOOL,
  82         },
  83         { /* end if list */ }
  84     },
  85 };
  86
  87 QemuOptsList qemu_chardev_opts = {
  88     .name = "chardev",
  89     .implied_opt_name = "backend",
  90     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  91     .desc = {
  92         {
  93             .name = "backend",
  94             .type = QEMU_OPT_STRING,
  95         },{
  96             .name = "path",
  97             .type = QEMU_OPT_STRING,
  98         },{
  99             .name = "host",
 100             .type = QEMU_OPT_STRING,
 101         },{
 102             .name = "port",
 103             .type = QEMU_OPT_STRING,
 104         },{
 105             .name = "localaddr",
 106             .type = QEMU_OPT_STRING,
 107         },{
 108             .name = "localport",
 109             .type = QEMU_OPT_STRING,
 110         },{
 111             .name = "to",
 112             .type = QEMU_OPT_NUMBER,
 113         },{
 114             .name = "ipv4",
 115             .type = QEMU_OPT_BOOL,
 116         },{
 117             .name = "ipv6",
 118             .type = QEMU_OPT_BOOL,
 119         },{
 120             .name = "wait",
 121             .type = QEMU_OPT_BOOL,
 122         },{
 123             .name = "server",
 124             .type = QEMU_OPT_BOOL,
 125         },{
 126             .name = "delay",
 127             .type = QEMU_OPT_BOOL,
 128         },{
 129             .name = "telnet",
 130             .type = QEMU_OPT_BOOL,
 131         },{
 132             .name = "width",
 133             .type = QEMU_OPT_NUMBER,
 134         },{
 135             .name = "height",
 136             .type = QEMU_OPT_NUMBER,
 137         },{
 138             .name = "cols",
 139             .type = QEMU_OPT_NUMBER,
 140         },{
 141             .name = "rows",
 142             .type = QEMU_OPT_NUMBER,
 143         },{
 144             .name = "mux",
 145             .type = QEMU_OPT_BOOL,
 146         },{
 147             .name = "signal",
 148             .type = QEMU_OPT_BOOL,
 149         },
 150         { /* end if list */ }
 151     },
 152 };
 153
 154 QemuOptsList qemu_device_opts = {
 155     .name = "device",
 156     .implied_opt_name = "driver",
 157     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 158     .desc = {
 159         /*
 160          * no elements => accept any
 161          * sanity checking will happen later
 162          * when setting device properties
 163          */
 164         { /* end if list */ }
 165     },
 166 };
 167
 168 QemuOptsList qemu_netdev_opts = {
 169     .name = "netdev",
 170     .implied_opt_name = "type",
 171     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 172     .desc = {
 173         /*
 174          * no elements => accept any params
 175          * validation will happen later
 176          */
 177         { /* end of list */ }
 178     },
 179 };
 180
 181 QemuOptsList qemu_net_opts = {
 182     .name = "net",
 183     .implied_opt_name = "type",
 184     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 185     .desc = {
 186         /*
 187          * no elements => accept any params
 188          * validation will happen later
 189          */
 190         { /* end of list */ }
 191     },
 192 };
 193
 194 QemuOptsList qemu_rtc_opts = {
 195     .name = "rtc",
 196     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 197     .desc = {
 198         {
 199             .name = "base",
 200             .type = QEMU_OPT_STRING,
 201         },{
 202             .name = "clock",
 203             .type = QEMU_OPT_STRING,
 204 #ifdef TARGET_I386
 205         },{
 206             .name = "driftfix",
 207             .type = QEMU_OPT_STRING,
 208 #endif
 209         },
 210         { /* end if list */ }
 211     },
 212 };
 213
 214 QemuOptsList qemu_global_opts = {
 215     .name = "global",
 216     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 217     .desc = {
 218         {
 219             .name = "driver",
 220             .type = QEMU_OPT_STRING,
 221         },{
 222             .name = "property",
 223             .type = QEMU_OPT_STRING,
 224         },{
 225             .name = "value",
 226             .type = QEMU_OPT_STRING,
 227         },
 228         { /* end if list */ }
 229     },
 230 };
 231
 232 QemuOptsList qemu_mon_opts = {
 233     .name = "mon",
 234     .implied_opt_name = "chardev",
 235     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 236     .desc = {
 237         {
 238             .name = "mode",
 239             .type = QEMU_OPT_STRING,
 240         },{
 241             .name = "chardev",
 242             .type = QEMU_OPT_STRING,
 243         },{
 244             .name = "default",
 245             .type = QEMU_OPT_BOOL,
 246         },
 247         { /* end if list */ }
 248     },
 249 };
 250
 251 QemuOptsList qemu_cpudef_opts = {
 252     .name = "cpudef",
 253     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 254     .desc = {
 255         {
 256             .name = "name",
 257             .type = QEMU_OPT_STRING,
 258         },{
 259             .name = "level",
 260             .type = QEMU_OPT_NUMBER,
 261         },{
 262             .name = "vendor",
 263             .type = QEMU_OPT_STRING,
 264         },{
 265             .name = "family",
 266             .type = QEMU_OPT_NUMBER,
 267         },{
 268             .name = "model",
 269             .type = QEMU_OPT_NUMBER,
 270         },{
 271             .name = "stepping",
 272             .type = QEMU_OPT_NUMBER,
 273         },{
 274             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 275             .type = QEMU_OPT_STRING,
 276         },{
 277             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 278             .type = QEMU_OPT_STRING,
 279         },{
 280             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 281             .type = QEMU_OPT_STRING,
 282         },{
 283             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 284             .type = QEMU_OPT_STRING,
 285         },{
 286             .name = "xlevel",
 287             .type = QEMU_OPT_NUMBER,
 288         },{
 289             .name = "model_id",
 290             .type = QEMU_OPT_STRING,
 291         },{
 292             .name = "vendor_override",
 293             .type = QEMU_OPT_NUMBER,
 294         },
 295         { /* end of list */ }
 296     },
 297 };
 298
 299 static QemuOptsList *vm_config_groups[] = {
 300     &qemu_drive_opts,
 301     &qemu_chardev_opts,
 302     &qemu_device_opts,
 303     &qemu_netdev_opts,
 304     &qemu_net_opts,
 305     &qemu_rtc_opts,
 306     &qemu_global_opts,
 307     &qemu_mon_opts,
 308     &qemu_cpudef_opts,
 309     NULL,
 310 };
 311
 312 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 313 {
 314     int i;
 315
 316     for (i = 0; lists[i] != NULL; i++) {
 317         if (strcmp(lists[i]->name, group) == 0)
 318             break;
 319     }
 320     if (lists[i] == NULL) {
 321         error_report("there is no option group \"%s\"", group);
 322     }
 323     return lists[i];
 324 }
 325
 326 QemuOptsList *qemu_find_opts(const char *group)
 327 {
 328     return find_list(vm_config_groups, group);
 329 }
 330
 331 int qemu_set_option(const char *str)
 332 {
 333     char group[64], id[64], arg[64];
 334     QemuOptsList *list;
 335     QemuOpts *opts;
 336     int rc, offset;
 337
 338     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 339     if (rc < 3 || str[offset] != '=') {
 340         error_report("can't parse: \"%s\"", str);
 341         return -1;
 342     }
 343
 344     list = qemu_find_opts(group);
 345     if (list == NULL) {
 346         return -1;
 347     }
 348
 349     opts = qemu_opts_find(list, id);
 350     if (!opts) {
 351         error_report("there is no %s \"%s\" defined",
 352                      list->name, id);
 353         return -1;
 354     }
 355
 356     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 357         return -1;
 358     }
 359     return 0;
 360 }
 361
 362 int qemu_global_option(const char *str)
 363 {
 364     char driver[64], property[64];
 365     QemuOpts *opts;
 366     int rc, offset;
 367
 368     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 369     if (rc < 2 || str[offset] != '=') {
 370         error_report("can't parse: \"%s\"", str);
 371         return -1;
 372     }
 373
 374     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 375     qemu_opt_set(opts, "driver", driver);
 376     qemu_opt_set(opts, "property", property);
 377     qemu_opt_set(opts, "value", str+offset+1);
 378     return 0;
 379 }
 380
 381 static int qemu_add_one_global(QemuOpts *opts, void *opaque)
 382 {
 383     GlobalProperty *g;
 384
 385     g = qemu_mallocz(sizeof(*g));
 386     g->driver   = qemu_opt_get(opts, "driver");
 387     g->property = qemu_opt_get(opts, "property");
 388     g->value    = qemu_opt_get(opts, "value");
 389     qdev_prop_register_global(g);
 390     return 0;
 391 }
 392
 393 void qemu_add_globals(void)
 394 {
 395     qemu_opts_foreach(&qemu_global_opts, qemu_add_one_global, NULL, 0);
 396 }
 397
 398 struct ConfigWriteData {
 399     QemuOptsList *list;
 400     FILE *fp;
 401 };
 402
 403 static int config_write_opt(const char *name, const char *value, void *opaque)
 404 {
 405     struct ConfigWriteData *data = opaque;
 406
 407     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 408     return 0;
 409 }
 410
 411 static int config_write_opts(QemuOpts *opts, void *opaque)
 412 {
 413     struct ConfigWriteData *data = opaque;
 414     const char *id = qemu_opts_id(opts);
 415
 416     if (id) {
 417         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 418     } else {
 419         fprintf(data->fp, "[%s]\n", data->list->name);
 420     }
 421     qemu_opt_foreach(opts, config_write_opt, data, 0);
 422     fprintf(data->fp, "\n");
 423     return 0;
 424 }
 425
 426 void qemu_config_write(FILE *fp)
 427 {
 428     struct ConfigWriteData data = { .fp = fp };
 429     QemuOptsList **lists = vm_config_groups;
 430     int i;
 431
 432     fprintf(fp, "# qemu config file\n\n");
 433     for (i = 0; lists[i] != NULL; i++) {
 434         data.list = lists[i];
 435         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 436     }
 437 }
 438
 439 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 440 {
 441     char line[1024], group[64], id[64], arg[64], value[1024];
 442     Location loc;
 443     QemuOptsList *list = NULL;
 444     QemuOpts *opts = NULL;
 445     int res = -1, lno = 0;
 446
 447     loc_push_none(&loc);
 448     while (fgets(line, sizeof(line), fp) != NULL) {
 449         loc_set_file(fname, ++lno);
 450         if (line[0] == '\n') {
 451             /* skip empty lines */
 452             continue;
 453         }
 454         if (line[0] == '#') {
 455             /* comment */
 456             continue;
 457         }
 458         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 459             /* group with id */
 460             list = find_list(lists, group);
 461             if (list == NULL)
 462                 goto out;
 463             opts = qemu_opts_create(list, id, 1);
 464             continue;
 465         }
 466         if (sscanf(line, "[%63[^]]]", group) == 1) {
 467             /* group without id */
 468             list = find_list(lists, group);
 469             if (list == NULL)
 470                 goto out;
 471             opts = qemu_opts_create(list, NULL, 0);
 472             continue;
 473         }
 474         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 475             /* arg = value */
 476             if (opts == NULL) {
 477                 error_report("no group defined");
 478                 goto out;
 479             }
 480             if (qemu_opt_set(opts, arg, value) != 0) {
 481                 goto out;
 482             }
 483             continue;
 484         }
 485         error_report("parse error");
 486         goto out;
 487     }
 488     if (ferror(fp)) {
 489         error_report("error reading file");
 490         goto out;
 491     }
 492     res = 0;
 493 out:
 494     loc_pop(&loc);
 495     return res;
 496 }
 497
 498 int qemu_read_config_file(const char *filename)
 499 {
 500     FILE *f = fopen(filename, "r");
 501     if (f == NULL) {
 502         return -errno;
 503     }
 504
 505     if (qemu_config_parse(f, vm_config_groups, filename) != 0) {
 506         return -EINVAL;
 507     }
 508     fclose(f);
 509
 510     return 0;
 511 }