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         { /* end of list */ }
  84     },
  85 };
  86
  87 static 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             .name = "name",
 151             .type = QEMU_OPT_STRING,
 152         },{
 153             .name = "debug",
 154             .type = QEMU_OPT_NUMBER,
 155         },
 156         { /* end of list */ }
 157     },
 158 };
 159
 160 QemuOptsList qemu_fsdev_opts = {
 161     .name = "fsdev",
 162     .implied_opt_name = "fstype",
 163     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 164     .desc = {
 165         {
 166             .name = "fstype",
 167             .type = QEMU_OPT_STRING,
 168         }, {
 169             .name = "path",
 170             .type = QEMU_OPT_STRING,
 171         }, {
 172             .name = "security_model",
 173             .type = QEMU_OPT_STRING,
 174         },
 175         { /*End of list */ }
 176     },
 177 };
 178
 179 QemuOptsList qemu_virtfs_opts = {
 180     .name = "virtfs",
 181     .implied_opt_name = "fstype",
 182     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 183     .desc = {
 184         {
 185             .name = "fstype",
 186             .type = QEMU_OPT_STRING,
 187         }, {
 188             .name = "path",
 189             .type = QEMU_OPT_STRING,
 190         }, {
 191             .name = "mount_tag",
 192             .type = QEMU_OPT_STRING,
 193         }, {
 194             .name = "security_model",
 195             .type = QEMU_OPT_STRING,
 196         },
 197
 198         { /*End of list */ }
 199     },
 200 };
 201
 202 static QemuOptsList qemu_device_opts = {
 203     .name = "device",
 204     .implied_opt_name = "driver",
 205     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 206     .desc = {
 207         /*
 208          * no elements => accept any
 209          * sanity checking will happen later
 210          * when setting device properties
 211          */
 212         { /* end of list */ }
 213     },
 214 };
 215
 216 static QemuOptsList qemu_netdev_opts = {
 217     .name = "netdev",
 218     .implied_opt_name = "type",
 219     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 220     .desc = {
 221         /*
 222          * no elements => accept any params
 223          * validation will happen later
 224          */
 225         { /* end of list */ }
 226     },
 227 };
 228
 229 static QemuOptsList qemu_net_opts = {
 230     .name = "net",
 231     .implied_opt_name = "type",
 232     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 233     .desc = {
 234         /*
 235          * no elements => accept any params
 236          * validation will happen later
 237          */
 238         { /* end of list */ }
 239     },
 240 };
 241
 242 static QemuOptsList qemu_rtc_opts = {
 243     .name = "rtc",
 244     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 245     .desc = {
 246         {
 247             .name = "base",
 248             .type = QEMU_OPT_STRING,
 249         },{
 250             .name = "clock",
 251             .type = QEMU_OPT_STRING,
 252         },{
 253             .name = "driftfix",
 254             .type = QEMU_OPT_STRING,
 255         },
 256         { /* end of list */ }
 257     },
 258 };
 259
 260 static QemuOptsList qemu_global_opts = {
 261     .name = "global",
 262     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 263     .desc = {
 264         {
 265             .name = "driver",
 266             .type = QEMU_OPT_STRING,
 267         },{
 268             .name = "property",
 269             .type = QEMU_OPT_STRING,
 270         },{
 271             .name = "value",
 272             .type = QEMU_OPT_STRING,
 273         },
 274         { /* end of list */ }
 275     },
 276 };
 277
 278 static QemuOptsList qemu_mon_opts = {
 279     .name = "mon",
 280     .implied_opt_name = "chardev",
 281     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 282     .desc = {
 283         {
 284             .name = "mode",
 285             .type = QEMU_OPT_STRING,
 286         },{
 287             .name = "chardev",
 288             .type = QEMU_OPT_STRING,
 289         },{
 290             .name = "default",
 291             .type = QEMU_OPT_BOOL,
 292         },{
 293             .name = "pretty",
 294             .type = QEMU_OPT_BOOL,
 295         },
 296         { /* end of list */ }
 297     },
 298 };
 299
 300 #ifdef CONFIG_SIMPLE_TRACE
 301 static QemuOptsList qemu_trace_opts = {
 302     .name = "trace",
 303     .implied_opt_name = "trace",
 304     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 305     .desc = {
 306         {
 307             .name = "file",
 308             .type = QEMU_OPT_STRING,
 309         },
 310         { /* end if list */ }
 311     },
 312 };
 313 #endif
 314
 315 static QemuOptsList qemu_cpudef_opts = {
 316     .name = "cpudef",
 317     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 318     .desc = {
 319         {
 320             .name = "name",
 321             .type = QEMU_OPT_STRING,
 322         },{
 323             .name = "level",
 324             .type = QEMU_OPT_NUMBER,
 325         },{
 326             .name = "vendor",
 327             .type = QEMU_OPT_STRING,
 328         },{
 329             .name = "family",
 330             .type = QEMU_OPT_NUMBER,
 331         },{
 332             .name = "model",
 333             .type = QEMU_OPT_NUMBER,
 334         },{
 335             .name = "stepping",
 336             .type = QEMU_OPT_NUMBER,
 337         },{
 338             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 339             .type = QEMU_OPT_STRING,
 340         },{
 341             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 342             .type = QEMU_OPT_STRING,
 343         },{
 344             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 345             .type = QEMU_OPT_STRING,
 346         },{
 347             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 348             .type = QEMU_OPT_STRING,
 349         },{
 350             .name = "xlevel",
 351             .type = QEMU_OPT_NUMBER,
 352         },{
 353             .name = "model_id",
 354             .type = QEMU_OPT_STRING,
 355         },{
 356             .name = "vendor_override",
 357             .type = QEMU_OPT_NUMBER,
 358         },
 359         { /* end of list */ }
 360     },
 361 };
 362
 363 QemuOptsList qemu_spice_opts = {
 364     .name = "spice",
 365     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 366     .desc = {
 367         {
 368             .name = "port",
 369             .type = QEMU_OPT_NUMBER,
 370         },{
 371             .name = "tls-port",
 372             .type = QEMU_OPT_NUMBER,
 373         },{
 374             .name = "addr",
 375             .type = QEMU_OPT_STRING,
 376         },{
 377             .name = "ipv4",
 378             .type = QEMU_OPT_BOOL,
 379         },{
 380             .name = "ipv6",
 381             .type = QEMU_OPT_BOOL,
 382         },{
 383             .name = "password",
 384             .type = QEMU_OPT_STRING,
 385         },{
 386             .name = "disable-ticketing",
 387             .type = QEMU_OPT_BOOL,
 388         },{
 389             .name = "x509-dir",
 390             .type = QEMU_OPT_STRING,
 391         },{
 392             .name = "x509-key-file",
 393             .type = QEMU_OPT_STRING,
 394         },{
 395             .name = "x509-key-password",
 396             .type = QEMU_OPT_STRING,
 397         },{
 398             .name = "x509-cert-file",
 399             .type = QEMU_OPT_STRING,
 400         },{
 401             .name = "x509-cacert-file",
 402             .type = QEMU_OPT_STRING,
 403         },{
 404             .name = "x509-dh-key-file",
 405             .type = QEMU_OPT_STRING,
 406         },{
 407             .name = "tls-ciphers",
 408             .type = QEMU_OPT_STRING,
 409         },{
 410             .name = "tls-channel",
 411             .type = QEMU_OPT_STRING,
 412         },{
 413             .name = "plaintext-channel",
 414             .type = QEMU_OPT_STRING,
 415         },{
 416             .name = "image-compression",
 417             .type = QEMU_OPT_STRING,
 418         },{
 419             .name = "jpeg-wan-compression",
 420             .type = QEMU_OPT_STRING,
 421         },{
 422             .name = "zlib-glz-wan-compression",
 423             .type = QEMU_OPT_STRING,
 424         },{
 425             .name = "streaming-video",
 426             .type = QEMU_OPT_STRING,
 427         },{
 428             .name = "agent-mouse",
 429             .type = QEMU_OPT_BOOL,
 430         },{
 431             .name = "playback-compression",
 432             .type = QEMU_OPT_BOOL,
 433         },
 434         { /* end if list */ }
 435     },
 436 };
 437
 438 QemuOptsList qemu_option_rom_opts = {
 439     .name = "option-rom",
 440     .implied_opt_name = "romfile",
 441     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 442     .desc = {
 443         {
 444             .name = "bootindex",
 445             .type = QEMU_OPT_NUMBER,
 446         }, {
 447             .name = "romfile",
 448             .type = QEMU_OPT_STRING,
 449         },
 450         { /* end if list */ }
 451     },
 452 };
 453
 454 static QemuOptsList *vm_config_groups[32] = {
 455     &qemu_drive_opts,
 456     &qemu_chardev_opts,
 457     &qemu_device_opts,
 458     &qemu_netdev_opts,
 459     &qemu_net_opts,
 460     &qemu_rtc_opts,
 461     &qemu_global_opts,
 462     &qemu_mon_opts,
 463     &qemu_cpudef_opts,
 464 #ifdef CONFIG_SIMPLE_TRACE
 465     &qemu_trace_opts,
 466 #endif
 467     &qemu_option_rom_opts,
 468     NULL,
 469 };
 470
 471 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 472 {
 473     int i;
 474
 475     for (i = 0; lists[i] != NULL; i++) {
 476         if (strcmp(lists[i]->name, group) == 0)
 477             break;
 478     }
 479     if (lists[i] == NULL) {
 480         error_report("there is no option group \"%s\"", group);
 481     }
 482     return lists[i];
 483 }
 484
 485 QemuOptsList *qemu_find_opts(const char *group)
 486 {
 487     return find_list(vm_config_groups, group);
 488 }
 489
 490 void qemu_add_opts(QemuOptsList *list)
 491 {
 492     int entries, i;
 493
 494     entries = ARRAY_SIZE(vm_config_groups);
 495     entries--; /* keep list NULL terminated */
 496     for (i = 0; i < entries; i++) {
 497         if (vm_config_groups[i] == NULL) {
 498             vm_config_groups[i] = list;
 499             return;
 500         }
 501     }
 502     fprintf(stderr, "ran out of space in vm_config_groups");
 503     abort();
 504 }
 505
 506 int qemu_set_option(const char *str)
 507 {
 508     char group[64], id[64], arg[64];
 509     QemuOptsList *list;
 510     QemuOpts *opts;
 511     int rc, offset;
 512
 513     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 514     if (rc < 3 || str[offset] != '=') {
 515         error_report("can't parse: \"%s\"", str);
 516         return -1;
 517     }
 518
 519     list = qemu_find_opts(group);
 520     if (list == NULL) {
 521         return -1;
 522     }
 523
 524     opts = qemu_opts_find(list, id);
 525     if (!opts) {
 526         error_report("there is no %s \"%s\" defined",
 527                      list->name, id);
 528         return -1;
 529     }
 530
 531     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 532         return -1;
 533     }
 534     return 0;
 535 }
 536
 537 int qemu_global_option(const char *str)
 538 {
 539     char driver[64], property[64];
 540     QemuOpts *opts;
 541     int rc, offset;
 542
 543     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 544     if (rc < 2 || str[offset] != '=') {
 545         error_report("can't parse: \"%s\"", str);
 546         return -1;
 547     }
 548
 549     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 550     qemu_opt_set(opts, "driver", driver);
 551     qemu_opt_set(opts, "property", property);
 552     qemu_opt_set(opts, "value", str+offset+1);
 553     return 0;
 554 }
 555
 556 struct ConfigWriteData {
 557     QemuOptsList *list;
 558     FILE *fp;
 559 };
 560
 561 static int config_write_opt(const char *name, const char *value, void *opaque)
 562 {
 563     struct ConfigWriteData *data = opaque;
 564
 565     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 566     return 0;
 567 }
 568
 569 static int config_write_opts(QemuOpts *opts, void *opaque)
 570 {
 571     struct ConfigWriteData *data = opaque;
 572     const char *id = qemu_opts_id(opts);
 573
 574     if (id) {
 575         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 576     } else {
 577         fprintf(data->fp, "[%s]\n", data->list->name);
 578     }
 579     qemu_opt_foreach(opts, config_write_opt, data, 0);
 580     fprintf(data->fp, "\n");
 581     return 0;
 582 }
 583
 584 void qemu_config_write(FILE *fp)
 585 {
 586     struct ConfigWriteData data = { .fp = fp };
 587     QemuOptsList **lists = vm_config_groups;
 588     int i;
 589
 590     fprintf(fp, "# qemu config file\n\n");
 591     for (i = 0; lists[i] != NULL; i++) {
 592         data.list = lists[i];
 593         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 594     }
 595 }
 596
 597 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 598 {
 599     char line[1024], group[64], id[64], arg[64], value[1024];
 600     Location loc;
 601     QemuOptsList *list = NULL;
 602     QemuOpts *opts = NULL;
 603     int res = -1, lno = 0;
 604
 605     loc_push_none(&loc);
 606     while (fgets(line, sizeof(line), fp) != NULL) {
 607         loc_set_file(fname, ++lno);
 608         if (line[0] == '\n') {
 609             /* skip empty lines */
 610             continue;
 611         }
 612         if (line[0] == '#') {
 613             /* comment */
 614             continue;
 615         }
 616         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 617             /* group with id */
 618             list = find_list(lists, group);
 619             if (list == NULL)
 620                 goto out;
 621             opts = qemu_opts_create(list, id, 1);
 622             continue;
 623         }
 624         if (sscanf(line, "[%63[^]]]", group) == 1) {
 625             /* group without id */
 626             list = find_list(lists, group);
 627             if (list == NULL)
 628                 goto out;
 629             opts = qemu_opts_create(list, NULL, 0);
 630             continue;
 631         }
 632         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 633             /* arg = value */
 634             if (opts == NULL) {
 635                 error_report("no group defined");
 636                 goto out;
 637             }
 638             if (qemu_opt_set(opts, arg, value) != 0) {
 639                 goto out;
 640             }
 641             continue;
 642         }
 643         error_report("parse error");
 644         goto out;
 645     }
 646     if (ferror(fp)) {
 647         error_report("error reading file");
 648         goto out;
 649     }
 650     res = 0;
 651 out:
 652     loc_pop(&loc);
 653     return res;
 654 }
 655
 656 int qemu_read_config_file(const char *filename)
 657 {
 658     FILE *f = fopen(filename, "r");
 659     int ret;
 660
 661     if (f == NULL) {
 662         return -errno;
 663     }
 664
 665     ret = qemu_config_parse(f, vm_config_groups, filename);
 666     fclose(f);
 667
 668     if (ret == 0) {
 669         return 0;
 670     } else {
 671         return -EINVAL;
 672     }
 673 }