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 struct ConfigWriteData {
 382     QemuOptsList *list;
 383     FILE *fp;
 384 };
 385
 386 static int config_write_opt(const char *name, const char *value, void *opaque)
 387 {
 388     struct ConfigWriteData *data = opaque;
 389
 390     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 391     return 0;
 392 }
 393
 394 static int config_write_opts(QemuOpts *opts, void *opaque)
 395 {
 396     struct ConfigWriteData *data = opaque;
 397     const char *id = qemu_opts_id(opts);
 398
 399     if (id) {
 400         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 401     } else {
 402         fprintf(data->fp, "[%s]\n", data->list->name);
 403     }
 404     qemu_opt_foreach(opts, config_write_opt, data, 0);
 405     fprintf(data->fp, "\n");
 406     return 0;
 407 }
 408
 409 void qemu_config_write(FILE *fp)
 410 {
 411     struct ConfigWriteData data = { .fp = fp };
 412     QemuOptsList **lists = vm_config_groups;
 413     int i;
 414
 415     fprintf(fp, "# qemu config file\n\n");
 416     for (i = 0; lists[i] != NULL; i++) {
 417         data.list = lists[i];
 418         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 419     }
 420 }
 421
 422 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 423 {
 424     char line[1024], group[64], id[64], arg[64], value[1024];
 425     Location loc;
 426     QemuOptsList *list = NULL;
 427     QemuOpts *opts = NULL;
 428     int res = -1, lno = 0;
 429
 430     loc_push_none(&loc);
 431     while (fgets(line, sizeof(line), fp) != NULL) {
 432         loc_set_file(fname, ++lno);
 433         if (line[0] == '\n') {
 434             /* skip empty lines */
 435             continue;
 436         }
 437         if (line[0] == '#') {
 438             /* comment */
 439             continue;
 440         }
 441         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 442             /* group with id */
 443             list = find_list(lists, group);
 444             if (list == NULL)
 445                 goto out;
 446             opts = qemu_opts_create(list, id, 1);
 447             continue;
 448         }
 449         if (sscanf(line, "[%63[^]]]", group) == 1) {
 450             /* group without id */
 451             list = find_list(lists, group);
 452             if (list == NULL)
 453                 goto out;
 454             opts = qemu_opts_create(list, NULL, 0);
 455             continue;
 456         }
 457         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 458             /* arg = value */
 459             if (opts == NULL) {
 460                 error_report("no group defined");
 461                 goto out;
 462             }
 463             if (qemu_opt_set(opts, arg, value) != 0) {
 464                 goto out;
 465             }
 466             continue;
 467         }
 468         error_report("parse error");
 469         goto out;
 470     }
 471     if (ferror(fp)) {
 472         error_report("error reading file");
 473         goto out;
 474     }
 475     res = 0;
 476 out:
 477     loc_pop(&loc);
 478     return res;
 479 }
 480
 481 int qemu_read_config_file(const char *filename)
 482 {
 483     FILE *f = fopen(filename, "r");
 484     if (f == NULL) {
 485         return -errno;
 486     }
 487
 488     if (qemu_config_parse(f, vm_config_groups, filename) != 0) {
 489         return -EINVAL;
 490     }
 491     fclose(f);
 492
 493     return 0;
 494 }