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         },{
  27             .name = "cyls",
  28             .type = QEMU_OPT_NUMBER,
  29             .help = "number of cylinders (ide disk geometry)",
  30         },{
  31             .name = "heads",
  32             .type = QEMU_OPT_NUMBER,
  33             .help = "number of heads (ide disk geometry)",
  34         },{
  35             .name = "secs",
  36             .type = QEMU_OPT_NUMBER,
  37             .help = "number of sectors (ide disk geometry)",
  38         },{
  39             .name = "trans",
  40             .type = QEMU_OPT_STRING,
  41             .help = "chs translation (auto, lba. none)",
  42         },{
  43             .name = "media",
  44             .type = QEMU_OPT_STRING,
  45             .help = "media type (disk, cdrom)",
  46         },{
  47             .name = "snapshot",
  48             .type = QEMU_OPT_BOOL,
  49         },{
  50             .name = "file",
  51             .type = QEMU_OPT_STRING,
  52             .help = "disk image",
  53         },{
  54             .name = "cache",
  55             .type = QEMU_OPT_STRING,
  56             .help = "host cache usage (none, writeback, writethrough, unsafe)",
  57         },{
  58             .name = "aio",
  59             .type = QEMU_OPT_STRING,
  60             .help = "host AIO implementation (threads, native)",
  61         },{
  62             .name = "format",
  63             .type = QEMU_OPT_STRING,
  64             .help = "disk format (raw, qcow2, ...)",
  65         },{
  66             .name = "serial",
  67             .type = QEMU_OPT_STRING,
  68         },{
  69             .name = "rerror",
  70             .type = QEMU_OPT_STRING,
  71         },{
  72             .name = "werror",
  73             .type = QEMU_OPT_STRING,
  74         },{
  75             .name = "addr",
  76             .type = QEMU_OPT_STRING,
  77             .help = "pci address (virtio only)",
  78         },{
  79             .name = "readonly",
  80             .type = QEMU_OPT_BOOL,
  81         },
  82         { /* end of list */ }
  83     },
  84 };
  85
  86 static QemuOptsList qemu_chardev_opts = {
  87     .name = "chardev",
  88     .implied_opt_name = "backend",
  89     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  90     .desc = {
  91         {
  92             .name = "backend",
  93             .type = QEMU_OPT_STRING,
  94         },{
  95             .name = "path",
  96             .type = QEMU_OPT_STRING,
  97         },{
  98             .name = "host",
  99             .type = QEMU_OPT_STRING,
 100         },{
 101             .name = "port",
 102             .type = QEMU_OPT_STRING,
 103         },{
 104             .name = "localaddr",
 105             .type = QEMU_OPT_STRING,
 106         },{
 107             .name = "localport",
 108             .type = QEMU_OPT_STRING,
 109         },{
 110             .name = "to",
 111             .type = QEMU_OPT_NUMBER,
 112         },{
 113             .name = "ipv4",
 114             .type = QEMU_OPT_BOOL,
 115         },{
 116             .name = "ipv6",
 117             .type = QEMU_OPT_BOOL,
 118         },{
 119             .name = "wait",
 120             .type = QEMU_OPT_BOOL,
 121         },{
 122             .name = "server",
 123             .type = QEMU_OPT_BOOL,
 124         },{
 125             .name = "delay",
 126             .type = QEMU_OPT_BOOL,
 127         },{
 128             .name = "telnet",
 129             .type = QEMU_OPT_BOOL,
 130         },{
 131             .name = "width",
 132             .type = QEMU_OPT_NUMBER,
 133         },{
 134             .name = "height",
 135             .type = QEMU_OPT_NUMBER,
 136         },{
 137             .name = "cols",
 138             .type = QEMU_OPT_NUMBER,
 139         },{
 140             .name = "rows",
 141             .type = QEMU_OPT_NUMBER,
 142         },{
 143             .name = "mux",
 144             .type = QEMU_OPT_BOOL,
 145         },{
 146             .name = "signal",
 147             .type = QEMU_OPT_BOOL,
 148         },{
 149             .name = "name",
 150             .type = QEMU_OPT_STRING,
 151         },{
 152             .name = "debug",
 153             .type = QEMU_OPT_NUMBER,
 154         },
 155         { /* end of list */ }
 156     },
 157 };
 158
 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
 178 QemuOptsList qemu_virtfs_opts = {
 179     .name = "virtfs",
 180     .implied_opt_name = "fstype",
 181     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 182     .desc = {
 183         {
 184             .name = "fstype",
 185             .type = QEMU_OPT_STRING,
 186         }, {
 187             .name = "path",
 188             .type = QEMU_OPT_STRING,
 189         }, {
 190             .name = "mount_tag",
 191             .type = QEMU_OPT_STRING,
 192         }, {
 193             .name = "security_model",
 194             .type = QEMU_OPT_STRING,
 195         },
 196
 197         { /*End of list */ }
 198     },
 199 };
 200
 201 static QemuOptsList qemu_device_opts = {
 202     .name = "device",
 203     .implied_opt_name = "driver",
 204     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 205     .desc = {
 206         /*
 207          * no elements => accept any
 208          * sanity checking will happen later
 209          * when setting device properties
 210          */
 211         { /* end of list */ }
 212     },
 213 };
 214
 215 static QemuOptsList qemu_netdev_opts = {
 216     .name = "netdev",
 217     .implied_opt_name = "type",
 218     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 219     .desc = {
 220         /*
 221          * no elements => accept any params
 222          * validation will happen later
 223          */
 224         { /* end of list */ }
 225     },
 226 };
 227
 228 static QemuOptsList qemu_net_opts = {
 229     .name = "net",
 230     .implied_opt_name = "type",
 231     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 232     .desc = {
 233         /*
 234          * no elements => accept any params
 235          * validation will happen later
 236          */
 237         { /* end of list */ }
 238     },
 239 };
 240
 241 static QemuOptsList qemu_rtc_opts = {
 242     .name = "rtc",
 243     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 244     .desc = {
 245         {
 246             .name = "base",
 247             .type = QEMU_OPT_STRING,
 248         },{
 249             .name = "clock",
 250             .type = QEMU_OPT_STRING,
 251         },{
 252             .name = "driftfix",
 253             .type = QEMU_OPT_STRING,
 254         },
 255         { /* end of list */ }
 256     },
 257 };
 258
 259 static QemuOptsList qemu_global_opts = {
 260     .name = "global",
 261     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 262     .desc = {
 263         {
 264             .name = "driver",
 265             .type = QEMU_OPT_STRING,
 266         },{
 267             .name = "property",
 268             .type = QEMU_OPT_STRING,
 269         },{
 270             .name = "value",
 271             .type = QEMU_OPT_STRING,
 272         },
 273         { /* end of list */ }
 274     },
 275 };
 276
 277 static QemuOptsList qemu_mon_opts = {
 278     .name = "mon",
 279     .implied_opt_name = "chardev",
 280     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 281     .desc = {
 282         {
 283             .name = "mode",
 284             .type = QEMU_OPT_STRING,
 285         },{
 286             .name = "chardev",
 287             .type = QEMU_OPT_STRING,
 288         },{
 289             .name = "default",
 290             .type = QEMU_OPT_BOOL,
 291         },{
 292             .name = "pretty",
 293             .type = QEMU_OPT_BOOL,
 294         },
 295         { /* end of list */ }
 296     },
 297 };
 298
 299 #ifdef CONFIG_SIMPLE_TRACE
 300 static QemuOptsList qemu_trace_opts = {
 301     .name = "trace",
 302     .implied_opt_name = "trace",
 303     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 304     .desc = {
 305         {
 306             .name = "file",
 307             .type = QEMU_OPT_STRING,
 308         },
 309         { /* end if list */ }
 310     },
 311 };
 312 #endif
 313
 314 static QemuOptsList qemu_cpudef_opts = {
 315     .name = "cpudef",
 316     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 317     .desc = {
 318         {
 319             .name = "name",
 320             .type = QEMU_OPT_STRING,
 321         },{
 322             .name = "level",
 323             .type = QEMU_OPT_NUMBER,
 324         },{
 325             .name = "vendor",
 326             .type = QEMU_OPT_STRING,
 327         },{
 328             .name = "family",
 329             .type = QEMU_OPT_NUMBER,
 330         },{
 331             .name = "model",
 332             .type = QEMU_OPT_NUMBER,
 333         },{
 334             .name = "stepping",
 335             .type = QEMU_OPT_NUMBER,
 336         },{
 337             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 338             .type = QEMU_OPT_STRING,
 339         },{
 340             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 341             .type = QEMU_OPT_STRING,
 342         },{
 343             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 344             .type = QEMU_OPT_STRING,
 345         },{
 346             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 347             .type = QEMU_OPT_STRING,
 348         },{
 349             .name = "xlevel",
 350             .type = QEMU_OPT_NUMBER,
 351         },{
 352             .name = "model_id",
 353             .type = QEMU_OPT_STRING,
 354         },{
 355             .name = "vendor_override",
 356             .type = QEMU_OPT_NUMBER,
 357         },
 358         { /* end of list */ }
 359     },
 360 };
 361
 362 QemuOptsList qemu_spice_opts = {
 363     .name = "spice",
 364     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 365     .desc = {
 366         {
 367             .name = "port",
 368             .type = QEMU_OPT_NUMBER,
 369         },{
 370             .name = "tls-port",
 371             .type = QEMU_OPT_NUMBER,
 372         },{
 373             .name = "addr",
 374             .type = QEMU_OPT_STRING,
 375         },{
 376             .name = "ipv4",
 377             .type = QEMU_OPT_BOOL,
 378         },{
 379             .name = "ipv6",
 380             .type = QEMU_OPT_BOOL,
 381         },{
 382             .name = "password",
 383             .type = QEMU_OPT_STRING,
 384         },{
 385             .name = "disable-ticketing",
 386             .type = QEMU_OPT_BOOL,
 387         },{
 388             .name = "x509-dir",
 389             .type = QEMU_OPT_STRING,
 390         },{
 391             .name = "x509-key-file",
 392             .type = QEMU_OPT_STRING,
 393         },{
 394             .name = "x509-key-password",
 395             .type = QEMU_OPT_STRING,
 396         },{
 397             .name = "x509-cert-file",
 398             .type = QEMU_OPT_STRING,
 399         },{
 400             .name = "x509-cacert-file",
 401             .type = QEMU_OPT_STRING,
 402         },{
 403             .name = "x509-dh-key-file",
 404             .type = QEMU_OPT_STRING,
 405         },{
 406             .name = "tls-ciphers",
 407             .type = QEMU_OPT_STRING,
 408         },{
 409             .name = "tls-channel",
 410             .type = QEMU_OPT_STRING,
 411         },{
 412             .name = "plaintext-channel",
 413             .type = QEMU_OPT_STRING,
 414         },{
 415             .name = "image-compression",
 416             .type = QEMU_OPT_STRING,
 417         },{
 418             .name = "jpeg-wan-compression",
 419             .type = QEMU_OPT_STRING,
 420         },{
 421             .name = "zlib-glz-wan-compression",
 422             .type = QEMU_OPT_STRING,
 423         },{
 424             .name = "streaming-video",
 425             .type = QEMU_OPT_STRING,
 426         },{
 427             .name = "agent-mouse",
 428             .type = QEMU_OPT_BOOL,
 429         },{
 430             .name = "playback-compression",
 431             .type = QEMU_OPT_BOOL,
 432         },
 433         { /* end if list */ }
 434     },
 435 };
 436
 437 QemuOptsList qemu_option_rom_opts = {
 438     .name = "option-rom",
 439     .implied_opt_name = "romfile",
 440     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 441     .desc = {
 442         {
 443             .name = "bootindex",
 444             .type = QEMU_OPT_NUMBER,
 445         }, {
 446             .name = "romfile",
 447             .type = QEMU_OPT_STRING,
 448         },
 449         { /* end if list */ }
 450     },
 451 };
 452
 453 static QemuOptsList qemu_machine_opts = {
 454     .name = "machine",
 455     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 456     .desc = {
 457         {
 458             .name = "accel",
 459             .type = QEMU_OPT_STRING,
 460             .help = "accelerator list",
 461         },
 462         { /* End of list */ }
 463     },
 464 };
 465
 466 static QemuOptsList *vm_config_groups[32] = {
 467     &qemu_drive_opts,
 468     &qemu_chardev_opts,
 469     &qemu_device_opts,
 470     &qemu_netdev_opts,
 471     &qemu_net_opts,
 472     &qemu_rtc_opts,
 473     &qemu_global_opts,
 474     &qemu_mon_opts,
 475     &qemu_cpudef_opts,
 476 #ifdef CONFIG_SIMPLE_TRACE
 477     &qemu_trace_opts,
 478 #endif
 479     &qemu_option_rom_opts,
 480     &qemu_machine_opts,
 481     NULL,
 482 };
 483
 484 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 485 {
 486     int i;
 487
 488     for (i = 0; lists[i] != NULL; i++) {
 489         if (strcmp(lists[i]->name, group) == 0)
 490             break;
 491     }
 492     if (lists[i] == NULL) {
 493         error_report("there is no option group \"%s\"", group);
 494     }
 495     return lists[i];
 496 }
 497
 498 QemuOptsList *qemu_find_opts(const char *group)
 499 {
 500     return find_list(vm_config_groups, group);
 501 }
 502
 503 void qemu_add_opts(QemuOptsList *list)
 504 {
 505     int entries, i;
 506
 507     entries = ARRAY_SIZE(vm_config_groups);
 508     entries--; /* keep list NULL terminated */
 509     for (i = 0; i < entries; i++) {
 510         if (vm_config_groups[i] == NULL) {
 511             vm_config_groups[i] = list;
 512             return;
 513         }
 514     }
 515     fprintf(stderr, "ran out of space in vm_config_groups");
 516     abort();
 517 }
 518
 519 int qemu_set_option(const char *str)
 520 {
 521     char group[64], id[64], arg[64];
 522     QemuOptsList *list;
 523     QemuOpts *opts;
 524     int rc, offset;
 525
 526     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 527     if (rc < 3 || str[offset] != '=') {
 528         error_report("can't parse: \"%s\"", str);
 529         return -1;
 530     }
 531
 532     list = qemu_find_opts(group);
 533     if (list == NULL) {
 534         return -1;
 535     }
 536
 537     opts = qemu_opts_find(list, id);
 538     if (!opts) {
 539         error_report("there is no %s \"%s\" defined",
 540                      list->name, id);
 541         return -1;
 542     }
 543
 544     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 545         return -1;
 546     }
 547     return 0;
 548 }
 549
 550 int qemu_global_option(const char *str)
 551 {
 552     char driver[64], property[64];
 553     QemuOpts *opts;
 554     int rc, offset;
 555
 556     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 557     if (rc < 2 || str[offset] != '=') {
 558         error_report("can't parse: \"%s\"", str);
 559         return -1;
 560     }
 561
 562     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 563     qemu_opt_set(opts, "driver", driver);
 564     qemu_opt_set(opts, "property", property);
 565     qemu_opt_set(opts, "value", str+offset+1);
 566     return 0;
 567 }
 568
 569 struct ConfigWriteData {
 570     QemuOptsList *list;
 571     FILE *fp;
 572 };
 573
 574 static int config_write_opt(const char *name, const char *value, void *opaque)
 575 {
 576     struct ConfigWriteData *data = opaque;
 577
 578     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 579     return 0;
 580 }
 581
 582 static int config_write_opts(QemuOpts *opts, void *opaque)
 583 {
 584     struct ConfigWriteData *data = opaque;
 585     const char *id = qemu_opts_id(opts);
 586
 587     if (id) {
 588         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 589     } else {
 590         fprintf(data->fp, "[%s]\n", data->list->name);
 591     }
 592     qemu_opt_foreach(opts, config_write_opt, data, 0);
 593     fprintf(data->fp, "\n");
 594     return 0;
 595 }
 596
 597 void qemu_config_write(FILE *fp)
 598 {
 599     struct ConfigWriteData data = { .fp = fp };
 600     QemuOptsList **lists = vm_config_groups;
 601     int i;
 602
 603     fprintf(fp, "# qemu config file\n\n");
 604     for (i = 0; lists[i] != NULL; i++) {
 605         data.list = lists[i];
 606         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 607     }
 608 }
 609
 610 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 611 {
 612     char line[1024], group[64], id[64], arg[64], value[1024];
 613     Location loc;
 614     QemuOptsList *list = NULL;
 615     QemuOpts *opts = NULL;
 616     int res = -1, lno = 0;
 617
 618     loc_push_none(&loc);
 619     while (fgets(line, sizeof(line), fp) != NULL) {
 620         loc_set_file(fname, ++lno);
 621         if (line[0] == '\n') {
 622             /* skip empty lines */
 623             continue;
 624         }
 625         if (line[0] == '#') {
 626             /* comment */
 627             continue;
 628         }
 629         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 630             /* group with id */
 631             list = find_list(lists, group);
 632             if (list == NULL)
 633                 goto out;
 634             opts = qemu_opts_create(list, id, 1);
 635             continue;
 636         }
 637         if (sscanf(line, "[%63[^]]]", group) == 1) {
 638             /* group without id */
 639             list = find_list(lists, group);
 640             if (list == NULL)
 641                 goto out;
 642             opts = qemu_opts_create(list, NULL, 0);
 643             continue;
 644         }
 645         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 646             /* arg = value */
 647             if (opts == NULL) {
 648                 error_report("no group defined");
 649                 goto out;
 650             }
 651             if (qemu_opt_set(opts, arg, value) != 0) {
 652                 goto out;
 653             }
 654             continue;
 655         }
 656         error_report("parse error");
 657         goto out;
 658     }
 659     if (ferror(fp)) {
 660         error_report("error reading file");
 661         goto out;
 662     }
 663     res = 0;
 664 out:
 665     loc_pop(&loc);
 666     return res;
 667 }
 668
 669 int qemu_read_config_file(const char *filename)
 670 {
 671     FILE *f = fopen(filename, "r");
 672     int ret;
 673
 674     if (f == NULL) {
 675         return -errno;
 676     }
 677
 678     ret = qemu_config_parse(f, vm_config_groups, filename);
 679     fclose(f);
 680
 681     if (ret == 0) {
 682         return 0;
 683     } else {
 684         return -EINVAL;
 685     }
 686 }