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, unsafe)",
  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             .name = "boot",
  84             .type = QEMU_OPT_BOOL,
  85             .help = "make this a boot drive",
  86         },
  87         { /* end if list */ }
  88     },
  89 };
  90
  91 QemuOptsList qemu_chardev_opts = {
  92     .name = "chardev",
  93     .implied_opt_name = "backend",
  94     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  95     .desc = {
  96         {
  97             .name = "backend",
  98             .type = QEMU_OPT_STRING,
  99         },{
 100             .name = "path",
 101             .type = QEMU_OPT_STRING,
 102         },{
 103             .name = "host",
 104             .type = QEMU_OPT_STRING,
 105         },{
 106             .name = "port",
 107             .type = QEMU_OPT_STRING,
 108         },{
 109             .name = "localaddr",
 110             .type = QEMU_OPT_STRING,
 111         },{
 112             .name = "localport",
 113             .type = QEMU_OPT_STRING,
 114         },{
 115             .name = "to",
 116             .type = QEMU_OPT_NUMBER,
 117         },{
 118             .name = "ipv4",
 119             .type = QEMU_OPT_BOOL,
 120         },{
 121             .name = "ipv6",
 122             .type = QEMU_OPT_BOOL,
 123         },{
 124             .name = "wait",
 125             .type = QEMU_OPT_BOOL,
 126         },{
 127             .name = "server",
 128             .type = QEMU_OPT_BOOL,
 129         },{
 130             .name = "delay",
 131             .type = QEMU_OPT_BOOL,
 132         },{
 133             .name = "telnet",
 134             .type = QEMU_OPT_BOOL,
 135         },{
 136             .name = "width",
 137             .type = QEMU_OPT_NUMBER,
 138         },{
 139             .name = "height",
 140             .type = QEMU_OPT_NUMBER,
 141         },{
 142             .name = "cols",
 143             .type = QEMU_OPT_NUMBER,
 144         },{
 145             .name = "rows",
 146             .type = QEMU_OPT_NUMBER,
 147         },{
 148             .name = "mux",
 149             .type = QEMU_OPT_BOOL,
 150         },{
 151             .name = "signal",
 152             .type = QEMU_OPT_BOOL,
 153         },
 154         { /* end if list */ }
 155     },
 156 };
 157
 158 #ifdef CONFIG_LINUX
 159 QemuOptsList qemu_fsdev_opts = {
 160     .name = "fsdev",
 161     .implied_opt_name = "fstype",
 162     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 163     .desc = {
 164         {
 165             .name = "fstype",
 166             .type = QEMU_OPT_STRING,
 167         }, {
 168             .name = "path",
 169             .type = QEMU_OPT_STRING,
 170         }, {
 171             .name = "security_model",
 172             .type = QEMU_OPT_STRING,
 173         },
 174         { /*End of list */ }
 175     },
 176 };
 177 #endif
 178
 179 #ifdef CONFIG_LINUX
 180 QemuOptsList qemu_virtfs_opts = {
 181     .name = "virtfs",
 182     .implied_opt_name = "fstype",
 183     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 184     .desc = {
 185         {
 186             .name = "fstype",
 187             .type = QEMU_OPT_STRING,
 188         }, {
 189             .name = "path",
 190             .type = QEMU_OPT_STRING,
 191         }, {
 192             .name = "mount_tag",
 193             .type = QEMU_OPT_STRING,
 194         }, {
 195             .name = "security_model",
 196             .type = QEMU_OPT_STRING,
 197         },
 198
 199         { /*End of list */ }
 200     },
 201 };
 202 #endif
 203
 204 QemuOptsList qemu_device_opts = {
 205     .name = "device",
 206     .implied_opt_name = "driver",
 207     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 208     .desc = {
 209         /*
 210          * no elements => accept any
 211          * sanity checking will happen later
 212          * when setting device properties
 213          */
 214         { /* end if list */ }
 215     },
 216 };
 217
 218 QemuOptsList qemu_netdev_opts = {
 219     .name = "netdev",
 220     .implied_opt_name = "type",
 221     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 222     .desc = {
 223         /*
 224          * no elements => accept any params
 225          * validation will happen later
 226          */
 227         { /* end of list */ }
 228     },
 229 };
 230
 231 QemuOptsList qemu_net_opts = {
 232     .name = "net",
 233     .implied_opt_name = "type",
 234     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 235     .desc = {
 236         /*
 237          * no elements => accept any params
 238          * validation will happen later
 239          */
 240         { /* end of list */ }
 241     },
 242 };
 243
 244 QemuOptsList qemu_rtc_opts = {
 245     .name = "rtc",
 246     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 247     .desc = {
 248         {
 249             .name = "base",
 250             .type = QEMU_OPT_STRING,
 251         },{
 252             .name = "clock",
 253             .type = QEMU_OPT_STRING,
 254 #ifdef TARGET_I386
 255         },{
 256             .name = "driftfix",
 257             .type = QEMU_OPT_STRING,
 258 #endif
 259         },
 260         { /* end if list */ }
 261     },
 262 };
 263
 264 QemuOptsList qemu_global_opts = {
 265     .name = "global",
 266     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 267     .desc = {
 268         {
 269             .name = "driver",
 270             .type = QEMU_OPT_STRING,
 271         },{
 272             .name = "property",
 273             .type = QEMU_OPT_STRING,
 274         },{
 275             .name = "value",
 276             .type = QEMU_OPT_STRING,
 277         },
 278         { /* end if list */ }
 279     },
 280 };
 281
 282 QemuOptsList qemu_mon_opts = {
 283     .name = "mon",
 284     .implied_opt_name = "chardev",
 285     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 286     .desc = {
 287         {
 288             .name = "mode",
 289             .type = QEMU_OPT_STRING,
 290         },{
 291             .name = "chardev",
 292             .type = QEMU_OPT_STRING,
 293         },{
 294             .name = "default",
 295             .type = QEMU_OPT_BOOL,
 296         },
 297         { /* end if list */ }
 298     },
 299 };
 300
 301 QemuOptsList qemu_cpudef_opts = {
 302     .name = "cpudef",
 303     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 304     .desc = {
 305         {
 306             .name = "name",
 307             .type = QEMU_OPT_STRING,
 308         },{
 309             .name = "level",
 310             .type = QEMU_OPT_NUMBER,
 311         },{
 312             .name = "vendor",
 313             .type = QEMU_OPT_STRING,
 314         },{
 315             .name = "family",
 316             .type = QEMU_OPT_NUMBER,
 317         },{
 318             .name = "model",
 319             .type = QEMU_OPT_NUMBER,
 320         },{
 321             .name = "stepping",
 322             .type = QEMU_OPT_NUMBER,
 323         },{
 324             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 325             .type = QEMU_OPT_STRING,
 326         },{
 327             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 328             .type = QEMU_OPT_STRING,
 329         },{
 330             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 331             .type = QEMU_OPT_STRING,
 332         },{
 333             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 334             .type = QEMU_OPT_STRING,
 335         },{
 336             .name = "xlevel",
 337             .type = QEMU_OPT_NUMBER,
 338         },{
 339             .name = "model_id",
 340             .type = QEMU_OPT_STRING,
 341         },{
 342             .name = "vendor_override",
 343             .type = QEMU_OPT_NUMBER,
 344         },
 345         { /* end of list */ }
 346     },
 347 };
 348
 349 static QemuOptsList *vm_config_groups[] = {
 350     &qemu_drive_opts,
 351     &qemu_chardev_opts,
 352     &qemu_device_opts,
 353     &qemu_netdev_opts,
 354     &qemu_net_opts,
 355     &qemu_rtc_opts,
 356     &qemu_global_opts,
 357     &qemu_mon_opts,
 358     &qemu_cpudef_opts,
 359     NULL,
 360 };
 361
 362 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 363 {
 364     int i;
 365
 366     for (i = 0; lists[i] != NULL; i++) {
 367         if (strcmp(lists[i]->name, group) == 0)
 368             break;
 369     }
 370     if (lists[i] == NULL) {
 371         error_report("there is no option group \"%s\"", group);
 372     }
 373     return lists[i];
 374 }
 375
 376 QemuOptsList *qemu_find_opts(const char *group)
 377 {
 378     return find_list(vm_config_groups, group);
 379 }
 380
 381 int qemu_set_option(const char *str)
 382 {
 383     char group[64], id[64], arg[64];
 384     QemuOptsList *list;
 385     QemuOpts *opts;
 386     int rc, offset;
 387
 388     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 389     if (rc < 3 || str[offset] != '=') {
 390         error_report("can't parse: \"%s\"", str);
 391         return -1;
 392     }
 393
 394     list = qemu_find_opts(group);
 395     if (list == NULL) {
 396         return -1;
 397     }
 398
 399     opts = qemu_opts_find(list, id);
 400     if (!opts) {
 401         error_report("there is no %s \"%s\" defined",
 402                      list->name, id);
 403         return -1;
 404     }
 405
 406     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 407         return -1;
 408     }
 409     return 0;
 410 }
 411
 412 int qemu_global_option(const char *str)
 413 {
 414     char driver[64], property[64];
 415     QemuOpts *opts;
 416     int rc, offset;
 417
 418     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 419     if (rc < 2 || str[offset] != '=') {
 420         error_report("can't parse: \"%s\"", str);
 421         return -1;
 422     }
 423
 424     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 425     qemu_opt_set(opts, "driver", driver);
 426     qemu_opt_set(opts, "property", property);
 427     qemu_opt_set(opts, "value", str+offset+1);
 428     return 0;
 429 }
 430
 431 struct ConfigWriteData {
 432     QemuOptsList *list;
 433     FILE *fp;
 434 };
 435
 436 static int config_write_opt(const char *name, const char *value, void *opaque)
 437 {
 438     struct ConfigWriteData *data = opaque;
 439
 440     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 441     return 0;
 442 }
 443
 444 static int config_write_opts(QemuOpts *opts, void *opaque)
 445 {
 446     struct ConfigWriteData *data = opaque;
 447     const char *id = qemu_opts_id(opts);
 448
 449     if (id) {
 450         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 451     } else {
 452         fprintf(data->fp, "[%s]\n", data->list->name);
 453     }
 454     qemu_opt_foreach(opts, config_write_opt, data, 0);
 455     fprintf(data->fp, "\n");
 456     return 0;
 457 }
 458
 459 void qemu_config_write(FILE *fp)
 460 {
 461     struct ConfigWriteData data = { .fp = fp };
 462     QemuOptsList **lists = vm_config_groups;
 463     int i;
 464
 465     fprintf(fp, "# qemu config file\n\n");
 466     for (i = 0; lists[i] != NULL; i++) {
 467         data.list = lists[i];
 468         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 469     }
 470 }
 471
 472 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 473 {
 474     char line[1024], group[64], id[64], arg[64], value[1024];
 475     Location loc;
 476     QemuOptsList *list = NULL;
 477     QemuOpts *opts = NULL;
 478     int res = -1, lno = 0;
 479
 480     loc_push_none(&loc);
 481     while (fgets(line, sizeof(line), fp) != NULL) {
 482         loc_set_file(fname, ++lno);
 483         if (line[0] == '\n') {
 484             /* skip empty lines */
 485             continue;
 486         }
 487         if (line[0] == '#') {
 488             /* comment */
 489             continue;
 490         }
 491         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 492             /* group with id */
 493             list = find_list(lists, group);
 494             if (list == NULL)
 495                 goto out;
 496             opts = qemu_opts_create(list, id, 1);
 497             continue;
 498         }
 499         if (sscanf(line, "[%63[^]]]", group) == 1) {
 500             /* group without id */
 501             list = find_list(lists, group);
 502             if (list == NULL)
 503                 goto out;
 504             opts = qemu_opts_create(list, NULL, 0);
 505             continue;
 506         }
 507         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 508             /* arg = value */
 509             if (opts == NULL) {
 510                 error_report("no group defined");
 511                 goto out;
 512             }
 513             if (qemu_opt_set(opts, arg, value) != 0) {
 514                 goto out;
 515             }
 516             continue;
 517         }
 518         error_report("parse error");
 519         goto out;
 520     }
 521     if (ferror(fp)) {
 522         error_report("error reading file");
 523         goto out;
 524     }
 525     res = 0;
 526 out:
 527     loc_pop(&loc);
 528     return res;
 529 }
 530
 531 int qemu_read_config_file(const char *filename)
 532 {
 533     FILE *f = fopen(filename, "r");
 534     int ret;
 535
 536     if (f == NULL) {
 537         return -errno;
 538     }
 539
 540     ret = qemu_config_parse(f, vm_config_groups, filename);
 541     fclose(f);
 542
 543     if (ret == 0) {
 544         return 0;
 545     } else {
 546         return -EINVAL;
 547     }
 548 }