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 "hw/qdev.h"
   6
   7 static QemuOptsList qemu_drive_opts = {
   8     .name = "drive",
   9     .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
  10     .desc = {
  11         {
  12             .name = "bus",
  13             .type = QEMU_OPT_NUMBER,
  14             .help = "bus number",
  15         },{
  16             .name = "unit",
  17             .type = QEMU_OPT_NUMBER,
  18             .help = "unit number (i.e. lun for scsi)",
  19         },{
  20             .name = "if",
  21             .type = QEMU_OPT_STRING,
  22             .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
  23         },{
  24             .name = "index",
  25             .type = QEMU_OPT_NUMBER,
  26             .help = "index 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             .help = "enable/disable snapshot mode",
  51         },{
  52             .name = "file",
  53             .type = QEMU_OPT_STRING,
  54             .help = "disk image",
  55         },{
  56             .name = "cache",
  57             .type = QEMU_OPT_STRING,
  58             .help = "host cache usage (none, writeback, writethrough, "
  59                     "directsync, unsafe)",
  60         },{
  61             .name = "aio",
  62             .type = QEMU_OPT_STRING,
  63             .help = "host AIO implementation (threads, native)",
  64         },{
  65             .name = "format",
  66             .type = QEMU_OPT_STRING,
  67             .help = "disk format (raw, qcow2, ...)",
  68         },{
  69             .name = "serial",
  70             .type = QEMU_OPT_STRING,
  71             .help = "disk serial number",
  72         },{
  73             .name = "rerror",
  74             .type = QEMU_OPT_STRING,
  75             .help = "read error action",
  76         },{
  77             .name = "werror",
  78             .type = QEMU_OPT_STRING,
  79             .help = "write error action",
  80         },{
  81             .name = "addr",
  82             .type = QEMU_OPT_STRING,
  83             .help = "pci address (virtio only)",
  84         },{
  85             .name = "readonly",
  86             .type = QEMU_OPT_BOOL,
  87             .help = "open drive file as read-only",
  88         },
  89         { /* end of list */ }
  90     },
  91 };
  92
  93 static QemuOptsList qemu_chardev_opts = {
  94     .name = "chardev",
  95     .implied_opt_name = "backend",
  96     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  97     .desc = {
  98         {
  99             .name = "backend",
 100             .type = QEMU_OPT_STRING,
 101         },{
 102             .name = "path",
 103             .type = QEMU_OPT_STRING,
 104         },{
 105             .name = "host",
 106             .type = QEMU_OPT_STRING,
 107         },{
 108             .name = "port",
 109             .type = QEMU_OPT_STRING,
 110         },{
 111             .name = "localaddr",
 112             .type = QEMU_OPT_STRING,
 113         },{
 114             .name = "localport",
 115             .type = QEMU_OPT_STRING,
 116         },{
 117             .name = "to",
 118             .type = QEMU_OPT_NUMBER,
 119         },{
 120             .name = "ipv4",
 121             .type = QEMU_OPT_BOOL,
 122         },{
 123             .name = "ipv6",
 124             .type = QEMU_OPT_BOOL,
 125         },{
 126             .name = "wait",
 127             .type = QEMU_OPT_BOOL,
 128         },{
 129             .name = "server",
 130             .type = QEMU_OPT_BOOL,
 131         },{
 132             .name = "delay",
 133             .type = QEMU_OPT_BOOL,
 134         },{
 135             .name = "telnet",
 136             .type = QEMU_OPT_BOOL,
 137         },{
 138             .name = "width",
 139             .type = QEMU_OPT_NUMBER,
 140         },{
 141             .name = "height",
 142             .type = QEMU_OPT_NUMBER,
 143         },{
 144             .name = "cols",
 145             .type = QEMU_OPT_NUMBER,
 146         },{
 147             .name = "rows",
 148             .type = QEMU_OPT_NUMBER,
 149         },{
 150             .name = "mux",
 151             .type = QEMU_OPT_BOOL,
 152         },{
 153             .name = "signal",
 154             .type = QEMU_OPT_BOOL,
 155         },{
 156             .name = "name",
 157             .type = QEMU_OPT_STRING,
 158         },{
 159             .name = "debug",
 160             .type = QEMU_OPT_NUMBER,
 161         },
 162         { /* end of list */ }
 163     },
 164 };
 165
 166 QemuOptsList qemu_fsdev_opts = {
 167     .name = "fsdev",
 168     .implied_opt_name = "fstype",
 169     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 170     .desc = {
 171         {
 172             .name = "fstype",
 173             .type = QEMU_OPT_STRING,
 174         }, {
 175             .name = "path",
 176             .type = QEMU_OPT_STRING,
 177         }, {
 178             .name = "security_model",
 179             .type = QEMU_OPT_STRING,
 180         },
 181         { /*End of list */ }
 182     },
 183 };
 184
 185 QemuOptsList qemu_virtfs_opts = {
 186     .name = "virtfs",
 187     .implied_opt_name = "fstype",
 188     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 189     .desc = {
 190         {
 191             .name = "fstype",
 192             .type = QEMU_OPT_STRING,
 193         }, {
 194             .name = "path",
 195             .type = QEMU_OPT_STRING,
 196         }, {
 197             .name = "mount_tag",
 198             .type = QEMU_OPT_STRING,
 199         }, {
 200             .name = "security_model",
 201             .type = QEMU_OPT_STRING,
 202         },
 203
 204         { /*End of list */ }
 205     },
 206 };
 207
 208 static QemuOptsList qemu_device_opts = {
 209     .name = "device",
 210     .implied_opt_name = "driver",
 211     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 212     .desc = {
 213         /*
 214          * no elements => accept any
 215          * sanity checking will happen later
 216          * when setting device properties
 217          */
 218         { /* end of list */ }
 219     },
 220 };
 221
 222 static QemuOptsList qemu_netdev_opts = {
 223     .name = "netdev",
 224     .implied_opt_name = "type",
 225     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 226     .desc = {
 227         /*
 228          * no elements => accept any params
 229          * validation will happen later
 230          */
 231         { /* end of list */ }
 232     },
 233 };
 234
 235 static QemuOptsList qemu_net_opts = {
 236     .name = "net",
 237     .implied_opt_name = "type",
 238     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 239     .desc = {
 240         /*
 241          * no elements => accept any params
 242          * validation will happen later
 243          */
 244         { /* end of list */ }
 245     },
 246 };
 247
 248 static QemuOptsList qemu_rtc_opts = {
 249     .name = "rtc",
 250     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 251     .desc = {
 252         {
 253             .name = "base",
 254             .type = QEMU_OPT_STRING,
 255         },{
 256             .name = "clock",
 257             .type = QEMU_OPT_STRING,
 258         },{
 259             .name = "driftfix",
 260             .type = QEMU_OPT_STRING,
 261         },
 262         { /* end of list */ }
 263     },
 264 };
 265
 266 static QemuOptsList qemu_global_opts = {
 267     .name = "global",
 268     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 269     .desc = {
 270         {
 271             .name = "driver",
 272             .type = QEMU_OPT_STRING,
 273         },{
 274             .name = "property",
 275             .type = QEMU_OPT_STRING,
 276         },{
 277             .name = "value",
 278             .type = QEMU_OPT_STRING,
 279         },
 280         { /* end of list */ }
 281     },
 282 };
 283
 284 static QemuOptsList qemu_mon_opts = {
 285     .name = "mon",
 286     .implied_opt_name = "chardev",
 287     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 288     .desc = {
 289         {
 290             .name = "mode",
 291             .type = QEMU_OPT_STRING,
 292         },{
 293             .name = "chardev",
 294             .type = QEMU_OPT_STRING,
 295         },{
 296             .name = "default",
 297             .type = QEMU_OPT_BOOL,
 298         },{
 299             .name = "pretty",
 300             .type = QEMU_OPT_BOOL,
 301         },
 302         { /* end of list */ }
 303     },
 304 };
 305
 306 static QemuOptsList qemu_trace_opts = {
 307     .name = "trace",
 308     .implied_opt_name = "trace",
 309     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 310     .desc = {
 311         {
 312             .name = "file",
 313             .type = QEMU_OPT_STRING,
 314         },
 315         { /* end of list */ }
 316     },
 317 };
 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 = "disable-copy-paste",
 394             .type = QEMU_OPT_BOOL,
 395         },{
 396             .name = "sasl",
 397             .type = QEMU_OPT_BOOL,
 398         },{
 399             .name = "x509-dir",
 400             .type = QEMU_OPT_STRING,
 401         },{
 402             .name = "x509-key-file",
 403             .type = QEMU_OPT_STRING,
 404         },{
 405             .name = "x509-key-password",
 406             .type = QEMU_OPT_STRING,
 407         },{
 408             .name = "x509-cert-file",
 409             .type = QEMU_OPT_STRING,
 410         },{
 411             .name = "x509-cacert-file",
 412             .type = QEMU_OPT_STRING,
 413         },{
 414             .name = "x509-dh-key-file",
 415             .type = QEMU_OPT_STRING,
 416         },{
 417             .name = "tls-ciphers",
 418             .type = QEMU_OPT_STRING,
 419         },{
 420             .name = "tls-channel",
 421             .type = QEMU_OPT_STRING,
 422         },{
 423             .name = "plaintext-channel",
 424             .type = QEMU_OPT_STRING,
 425         },{
 426             .name = "image-compression",
 427             .type = QEMU_OPT_STRING,
 428         },{
 429             .name = "jpeg-wan-compression",
 430             .type = QEMU_OPT_STRING,
 431         },{
 432             .name = "zlib-glz-wan-compression",
 433             .type = QEMU_OPT_STRING,
 434         },{
 435             .name = "streaming-video",
 436             .type = QEMU_OPT_STRING,
 437         },{
 438             .name = "agent-mouse",
 439             .type = QEMU_OPT_BOOL,
 440         },{
 441             .name = "playback-compression",
 442             .type = QEMU_OPT_BOOL,
 443         },
 444         { /* end of list */ }
 445     },
 446 };
 447
 448 QemuOptsList qemu_option_rom_opts = {
 449     .name = "option-rom",
 450     .implied_opt_name = "romfile",
 451     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 452     .desc = {
 453         {
 454             .name = "bootindex",
 455             .type = QEMU_OPT_NUMBER,
 456         }, {
 457             .name = "romfile",
 458             .type = QEMU_OPT_STRING,
 459         },
 460         { /* end of list */ }
 461     },
 462 };
 463
 464 static QemuOptsList qemu_machine_opts = {
 465     .name = "machine",
 466     .implied_opt_name = "type",
 467     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 468     .desc = {
 469         {
 470             .name = "type",
 471             .type = QEMU_OPT_STRING,
 472             .help = "emulated machine"
 473         }, {
 474             .name = "accel",
 475             .type = QEMU_OPT_STRING,
 476             .help = "accelerator list",
 477         },
 478         { /* End of list */ }
 479     },
 480 };
 481
 482 QemuOptsList qemu_boot_opts = {
 483     .name = "boot-opts",
 484     .head = QTAILQ_HEAD_INITIALIZER(qemu_boot_opts.head),
 485     .desc = {
 486         /* the three names below are not used now */
 487         {
 488             .name = "order",
 489             .type = QEMU_OPT_STRING,
 490         }, {
 491             .name = "once",
 492             .type = QEMU_OPT_STRING,
 493         }, {
 494             .name = "menu",
 495             .type = QEMU_OPT_STRING,
 496         /* following are really used */
 497         }, {
 498             .name = "splash",
 499             .type = QEMU_OPT_STRING,
 500         }, {
 501             .name = "splash-time",
 502             .type = QEMU_OPT_STRING,
 503         },
 504         { /*End of list */ }
 505     },
 506 };
 507
 508 static QemuOptsList *vm_config_groups[32] = {
 509     &qemu_drive_opts,
 510     &qemu_chardev_opts,
 511     &qemu_device_opts,
 512     &qemu_netdev_opts,
 513     &qemu_net_opts,
 514     &qemu_rtc_opts,
 515     &qemu_global_opts,
 516     &qemu_mon_opts,
 517     &qemu_cpudef_opts,
 518     &qemu_trace_opts,
 519     &qemu_option_rom_opts,
 520     &qemu_machine_opts,
 521     &qemu_boot_opts,
 522     NULL,
 523 };
 524
 525 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 526 {
 527     int i;
 528
 529     for (i = 0; lists[i] != NULL; i++) {
 530         if (strcmp(lists[i]->name, group) == 0)
 531             break;
 532     }
 533     if (lists[i] == NULL) {
 534         error_report("there is no option group \"%s\"", group);
 535     }
 536     return lists[i];
 537 }
 538
 539 QemuOptsList *qemu_find_opts(const char *group)
 540 {
 541     return find_list(vm_config_groups, group);
 542 }
 543
 544 void qemu_add_opts(QemuOptsList *list)
 545 {
 546     int entries, i;
 547
 548     entries = ARRAY_SIZE(vm_config_groups);
 549     entries--; /* keep list NULL terminated */
 550     for (i = 0; i < entries; i++) {
 551         if (vm_config_groups[i] == NULL) {
 552             vm_config_groups[i] = list;
 553             return;
 554         }
 555     }
 556     fprintf(stderr, "ran out of space in vm_config_groups");
 557     abort();
 558 }
 559
 560 int qemu_set_option(const char *str)
 561 {
 562     char group[64], id[64], arg[64];
 563     QemuOptsList *list;
 564     QemuOpts *opts;
 565     int rc, offset;
 566
 567     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 568     if (rc < 3 || str[offset] != '=') {
 569         error_report("can't parse: \"%s\"", str);
 570         return -1;
 571     }
 572
 573     list = qemu_find_opts(group);
 574     if (list == NULL) {
 575         return -1;
 576     }
 577
 578     opts = qemu_opts_find(list, id);
 579     if (!opts) {
 580         error_report("there is no %s \"%s\" defined",
 581                      list->name, id);
 582         return -1;
 583     }
 584
 585     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 586         return -1;
 587     }
 588     return 0;
 589 }
 590
 591 int qemu_global_option(const char *str)
 592 {
 593     char driver[64], property[64];
 594     QemuOpts *opts;
 595     int rc, offset;
 596
 597     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 598     if (rc < 2 || str[offset] != '=') {
 599         error_report("can't parse: \"%s\"", str);
 600         return -1;
 601     }
 602
 603     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 604     qemu_opt_set(opts, "driver", driver);
 605     qemu_opt_set(opts, "property", property);
 606     qemu_opt_set(opts, "value", str+offset+1);
 607     return 0;
 608 }
 609
 610 struct ConfigWriteData {
 611     QemuOptsList *list;
 612     FILE *fp;
 613 };
 614
 615 static int config_write_opt(const char *name, const char *value, void *opaque)
 616 {
 617     struct ConfigWriteData *data = opaque;
 618
 619     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 620     return 0;
 621 }
 622
 623 static int config_write_opts(QemuOpts *opts, void *opaque)
 624 {
 625     struct ConfigWriteData *data = opaque;
 626     const char *id = qemu_opts_id(opts);
 627
 628     if (id) {
 629         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 630     } else {
 631         fprintf(data->fp, "[%s]\n", data->list->name);
 632     }
 633     qemu_opt_foreach(opts, config_write_opt, data, 0);
 634     fprintf(data->fp, "\n");
 635     return 0;
 636 }
 637
 638 void qemu_config_write(FILE *fp)
 639 {
 640     struct ConfigWriteData data = { .fp = fp };
 641     QemuOptsList **lists = vm_config_groups;
 642     int i;
 643
 644     fprintf(fp, "# qemu config file\n\n");
 645     for (i = 0; lists[i] != NULL; i++) {
 646         data.list = lists[i];
 647         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 648     }
 649 }
 650
 651 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 652 {
 653     char line[1024], group[64], id[64], arg[64], value[1024];
 654     Location loc;
 655     QemuOptsList *list = NULL;
 656     QemuOpts *opts = NULL;
 657     int res = -1, lno = 0;
 658
 659     loc_push_none(&loc);
 660     while (fgets(line, sizeof(line), fp) != NULL) {
 661         loc_set_file(fname, ++lno);
 662         if (line[0] == '\n') {
 663             /* skip empty lines */
 664             continue;
 665         }
 666         if (line[0] == '#') {
 667             /* comment */
 668             continue;
 669         }
 670         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 671             /* group with id */
 672             list = find_list(lists, group);
 673             if (list == NULL)
 674                 goto out;
 675             opts = qemu_opts_create(list, id, 1);
 676             continue;
 677         }
 678         if (sscanf(line, "[%63[^]]]", group) == 1) {
 679             /* group without id */
 680             list = find_list(lists, group);
 681             if (list == NULL)
 682                 goto out;
 683             opts = qemu_opts_create(list, NULL, 0);
 684             continue;
 685         }
 686         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 687             /* arg = value */
 688             if (opts == NULL) {
 689                 error_report("no group defined");
 690                 goto out;
 691             }
 692             if (qemu_opt_set(opts, arg, value) != 0) {
 693                 goto out;
 694             }
 695             continue;
 696         }
 697         error_report("parse error");
 698         goto out;
 699     }
 700     if (ferror(fp)) {
 701         error_report("error reading file");
 702         goto out;
 703     }
 704     res = 0;
 705 out:
 706     loc_pop(&loc);
 707     return res;
 708 }
 709
 710 int qemu_read_config_file(const char *filename)
 711 {
 712     FILE *f = fopen(filename, "r");
 713     int ret;
 714
 715     if (f == NULL) {
 716         return -errno;
 717     }
 718
 719     ret = qemu_config_parse(f, vm_config_groups, filename);
 720     fclose(f);
 721
 722     if (ret == 0) {
 723         return 0;
 724     } else {
 725         return -EINVAL;
 726     }
 727 }