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 static 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 of list */ }
  88     },
  89 };
  90
  91 static 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             .name = "name",
 155             .type = QEMU_OPT_STRING,
 156         },{
 157             .name = "debug",
 158             .type = QEMU_OPT_NUMBER,
 159         },
 160         { /* end of list */ }
 161     },
 162 };
 163
 164 QemuOptsList qemu_fsdev_opts = {
 165     .name = "fsdev",
 166     .implied_opt_name = "fstype",
 167     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 168     .desc = {
 169         {
 170             .name = "fstype",
 171             .type = QEMU_OPT_STRING,
 172         }, {
 173             .name = "path",
 174             .type = QEMU_OPT_STRING,
 175         }, {
 176             .name = "security_model",
 177             .type = QEMU_OPT_STRING,
 178         },
 179         { /*End of list */ }
 180     },
 181 };
 182
 183 QemuOptsList qemu_virtfs_opts = {
 184     .name = "virtfs",
 185     .implied_opt_name = "fstype",
 186     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 187     .desc = {
 188         {
 189             .name = "fstype",
 190             .type = QEMU_OPT_STRING,
 191         }, {
 192             .name = "path",
 193             .type = QEMU_OPT_STRING,
 194         }, {
 195             .name = "mount_tag",
 196             .type = QEMU_OPT_STRING,
 197         }, {
 198             .name = "security_model",
 199             .type = QEMU_OPT_STRING,
 200         },
 201
 202         { /*End of list */ }
 203     },
 204 };
 205
 206 static QemuOptsList qemu_device_opts = {
 207     .name = "device",
 208     .implied_opt_name = "driver",
 209     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 210     .desc = {
 211         /*
 212          * no elements => accept any
 213          * sanity checking will happen later
 214          * when setting device properties
 215          */
 216         { /* end of list */ }
 217     },
 218 };
 219
 220 static QemuOptsList qemu_netdev_opts = {
 221     .name = "netdev",
 222     .implied_opt_name = "type",
 223     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 224     .desc = {
 225         /*
 226          * no elements => accept any params
 227          * validation will happen later
 228          */
 229         { /* end of list */ }
 230     },
 231 };
 232
 233 static QemuOptsList qemu_net_opts = {
 234     .name = "net",
 235     .implied_opt_name = "type",
 236     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 237     .desc = {
 238         /*
 239          * no elements => accept any params
 240          * validation will happen later
 241          */
 242         { /* end of list */ }
 243     },
 244 };
 245
 246 static QemuOptsList qemu_rtc_opts = {
 247     .name = "rtc",
 248     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 249     .desc = {
 250         {
 251             .name = "base",
 252             .type = QEMU_OPT_STRING,
 253         },{
 254             .name = "clock",
 255             .type = QEMU_OPT_STRING,
 256         },{
 257             .name = "driftfix",
 258             .type = QEMU_OPT_STRING,
 259         },
 260         { /* end of list */ }
 261     },
 262 };
 263
 264 static 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 of list */ }
 279     },
 280 };
 281
 282 static 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             .name = "pretty",
 298             .type = QEMU_OPT_BOOL,
 299         },
 300         { /* end of list */ }
 301     },
 302 };
 303
 304 #ifdef CONFIG_SIMPLE_TRACE
 305 static QemuOptsList qemu_trace_opts = {
 306     .name = "trace",
 307     .implied_opt_name = "trace",
 308     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 309     .desc = {
 310         {
 311             .name = "file",
 312             .type = QEMU_OPT_STRING,
 313         },
 314         { /* end if list */ }
 315     },
 316 };
 317 #endif
 318
 319 static QemuOptsList qemu_cpudef_opts = {
 320     .name = "cpudef",
 321     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 322     .desc = {
 323         {
 324             .name = "name",
 325             .type = QEMU_OPT_STRING,
 326         },{
 327             .name = "level",
 328             .type = QEMU_OPT_NUMBER,
 329         },{
 330             .name = "vendor",
 331             .type = QEMU_OPT_STRING,
 332         },{
 333             .name = "family",
 334             .type = QEMU_OPT_NUMBER,
 335         },{
 336             .name = "model",
 337             .type = QEMU_OPT_NUMBER,
 338         },{
 339             .name = "stepping",
 340             .type = QEMU_OPT_NUMBER,
 341         },{
 342             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 343             .type = QEMU_OPT_STRING,
 344         },{
 345             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 346             .type = QEMU_OPT_STRING,
 347         },{
 348             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 349             .type = QEMU_OPT_STRING,
 350         },{
 351             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 352             .type = QEMU_OPT_STRING,
 353         },{
 354             .name = "xlevel",
 355             .type = QEMU_OPT_NUMBER,
 356         },{
 357             .name = "model_id",
 358             .type = QEMU_OPT_STRING,
 359         },{
 360             .name = "vendor_override",
 361             .type = QEMU_OPT_NUMBER,
 362         },
 363         { /* end of list */ }
 364     },
 365 };
 366
 367 QemuOptsList qemu_spice_opts = {
 368     .name = "spice",
 369     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 370     .desc = {
 371         {
 372             .name = "port",
 373             .type = QEMU_OPT_NUMBER,
 374         },{
 375             .name = "tls-port",
 376             .type = QEMU_OPT_NUMBER,
 377         },{
 378             .name = "addr",
 379             .type = QEMU_OPT_STRING,
 380         },{
 381             .name = "ipv4",
 382             .type = QEMU_OPT_BOOL,
 383         },{
 384             .name = "ipv6",
 385             .type = QEMU_OPT_BOOL,
 386         },{
 387             .name = "password",
 388             .type = QEMU_OPT_STRING,
 389         },{
 390             .name = "disable-ticketing",
 391             .type = QEMU_OPT_BOOL,
 392         },{
 393             .name = "x509-dir",
 394             .type = QEMU_OPT_STRING,
 395         },{
 396             .name = "x509-key-file",
 397             .type = QEMU_OPT_STRING,
 398         },{
 399             .name = "x509-key-password",
 400             .type = QEMU_OPT_STRING,
 401         },{
 402             .name = "x509-cert-file",
 403             .type = QEMU_OPT_STRING,
 404         },{
 405             .name = "x509-cacert-file",
 406             .type = QEMU_OPT_STRING,
 407         },{
 408             .name = "x509-dh-key-file",
 409             .type = QEMU_OPT_STRING,
 410         },{
 411             .name = "tls-ciphers",
 412             .type = QEMU_OPT_STRING,
 413         },{
 414             .name = "tls-channel",
 415             .type = QEMU_OPT_STRING,
 416         },{
 417             .name = "plaintext-channel",
 418             .type = QEMU_OPT_STRING,
 419         },{
 420             .name = "image-compression",
 421             .type = QEMU_OPT_STRING,
 422         },{
 423             .name = "jpeg-wan-compression",
 424             .type = QEMU_OPT_STRING,
 425         },{
 426             .name = "zlib-glz-wan-compression",
 427             .type = QEMU_OPT_STRING,
 428         },{
 429             .name = "streaming-video",
 430             .type = QEMU_OPT_STRING,
 431         },{
 432             .name = "agent-mouse",
 433             .type = QEMU_OPT_BOOL,
 434         },{
 435             .name = "playback-compression",
 436             .type = QEMU_OPT_BOOL,
 437         },
 438         { /* end if list */ }
 439     },
 440 };
 441
 442 QemuOptsList qemu_option_rom_opts = {
 443     .name = "option-rom",
 444     .implied_opt_name = "romfile",
 445     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 446     .desc = {
 447         {
 448             .name = "bootindex",
 449             .type = QEMU_OPT_NUMBER,
 450         }, {
 451             .name = "romfile",
 452             .type = QEMU_OPT_STRING,
 453         },
 454         { /* end if list */ }
 455     },
 456 };
 457
 458 static QemuOptsList *vm_config_groups[32] = {
 459     &qemu_drive_opts,
 460     &qemu_chardev_opts,
 461     &qemu_device_opts,
 462     &qemu_netdev_opts,
 463     &qemu_net_opts,
 464     &qemu_rtc_opts,
 465     &qemu_global_opts,
 466     &qemu_mon_opts,
 467     &qemu_cpudef_opts,
 468 #ifdef CONFIG_SIMPLE_TRACE
 469     &qemu_trace_opts,
 470 #endif
 471     &qemu_option_rom_opts,
 472     NULL,
 473 };
 474
 475 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 476 {
 477     int i;
 478
 479     for (i = 0; lists[i] != NULL; i++) {
 480         if (strcmp(lists[i]->name, group) == 0)
 481             break;
 482     }
 483     if (lists[i] == NULL) {
 484         error_report("there is no option group \"%s\"", group);
 485     }
 486     return lists[i];
 487 }
 488
 489 QemuOptsList *qemu_find_opts(const char *group)
 490 {
 491     return find_list(vm_config_groups, group);
 492 }
 493
 494 void qemu_add_opts(QemuOptsList *list)
 495 {
 496     int entries, i;
 497
 498     entries = ARRAY_SIZE(vm_config_groups);
 499     entries--; /* keep list NULL terminated */
 500     for (i = 0; i < entries; i++) {
 501         if (vm_config_groups[i] == NULL) {
 502             vm_config_groups[i] = list;
 503             return;
 504         }
 505     }
 506     fprintf(stderr, "ran out of space in vm_config_groups");
 507     abort();
 508 }
 509
 510 int qemu_set_option(const char *str)
 511 {
 512     char group[64], id[64], arg[64];
 513     QemuOptsList *list;
 514     QemuOpts *opts;
 515     int rc, offset;
 516
 517     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 518     if (rc < 3 || str[offset] != '=') {
 519         error_report("can't parse: \"%s\"", str);
 520         return -1;
 521     }
 522
 523     list = qemu_find_opts(group);
 524     if (list == NULL) {
 525         return -1;
 526     }
 527
 528     opts = qemu_opts_find(list, id);
 529     if (!opts) {
 530         error_report("there is no %s \"%s\" defined",
 531                      list->name, id);
 532         return -1;
 533     }
 534
 535     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 536         return -1;
 537     }
 538     return 0;
 539 }
 540
 541 int qemu_global_option(const char *str)
 542 {
 543     char driver[64], property[64];
 544     QemuOpts *opts;
 545     int rc, offset;
 546
 547     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 548     if (rc < 2 || str[offset] != '=') {
 549         error_report("can't parse: \"%s\"", str);
 550         return -1;
 551     }
 552
 553     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 554     qemu_opt_set(opts, "driver", driver);
 555     qemu_opt_set(opts, "property", property);
 556     qemu_opt_set(opts, "value", str+offset+1);
 557     return 0;
 558 }
 559
 560 struct ConfigWriteData {
 561     QemuOptsList *list;
 562     FILE *fp;
 563 };
 564
 565 static int config_write_opt(const char *name, const char *value, void *opaque)
 566 {
 567     struct ConfigWriteData *data = opaque;
 568
 569     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 570     return 0;
 571 }
 572
 573 static int config_write_opts(QemuOpts *opts, void *opaque)
 574 {
 575     struct ConfigWriteData *data = opaque;
 576     const char *id = qemu_opts_id(opts);
 577
 578     if (id) {
 579         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 580     } else {
 581         fprintf(data->fp, "[%s]\n", data->list->name);
 582     }
 583     qemu_opt_foreach(opts, config_write_opt, data, 0);
 584     fprintf(data->fp, "\n");
 585     return 0;
 586 }
 587
 588 void qemu_config_write(FILE *fp)
 589 {
 590     struct ConfigWriteData data = { .fp = fp };
 591     QemuOptsList **lists = vm_config_groups;
 592     int i;
 593
 594     fprintf(fp, "# qemu config file\n\n");
 595     for (i = 0; lists[i] != NULL; i++) {
 596         data.list = lists[i];
 597         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 598     }
 599 }
 600
 601 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 602 {
 603     char line[1024], group[64], id[64], arg[64], value[1024];
 604     Location loc;
 605     QemuOptsList *list = NULL;
 606     QemuOpts *opts = NULL;
 607     int res = -1, lno = 0;
 608
 609     loc_push_none(&loc);
 610     while (fgets(line, sizeof(line), fp) != NULL) {
 611         loc_set_file(fname, ++lno);
 612         if (line[0] == '\n') {
 613             /* skip empty lines */
 614             continue;
 615         }
 616         if (line[0] == '#') {
 617             /* comment */
 618             continue;
 619         }
 620         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 621             /* group with id */
 622             list = find_list(lists, group);
 623             if (list == NULL)
 624                 goto out;
 625             opts = qemu_opts_create(list, id, 1);
 626             continue;
 627         }
 628         if (sscanf(line, "[%63[^]]]", group) == 1) {
 629             /* group without id */
 630             list = find_list(lists, group);
 631             if (list == NULL)
 632                 goto out;
 633             opts = qemu_opts_create(list, NULL, 0);
 634             continue;
 635         }
 636         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 637             /* arg = value */
 638             if (opts == NULL) {
 639                 error_report("no group defined");
 640                 goto out;
 641             }
 642             if (qemu_opt_set(opts, arg, value) != 0) {
 643                 goto out;
 644             }
 645             continue;
 646         }
 647         error_report("parse error");
 648         goto out;
 649     }
 650     if (ferror(fp)) {
 651         error_report("error reading file");
 652         goto out;
 653     }
 654     res = 0;
 655 out:
 656     loc_pop(&loc);
 657     return res;
 658 }
 659
 660 int qemu_read_config_file(const char *filename)
 661 {
 662     FILE *f = fopen(filename, "r");
 663     int ret;
 664
 665     if (f == NULL) {
 666         return -errno;
 667     }
 668
 669     ret = qemu_config_parse(f, vm_config_groups, filename);
 670     fclose(f);
 671
 672     if (ret == 0) {
 673         return 0;
 674     } else {
 675         return -EINVAL;
 676     }
 677 }