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             .name = "boot",
  83             .type = QEMU_OPT_BOOL,
  84             .help = "make this a boot drive",
  85         },
  86         { /* end of list */ }
  87     },
  88 };
  89
  90 static QemuOptsList qemu_chardev_opts = {
  91     .name = "chardev",
  92     .implied_opt_name = "backend",
  93     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  94     .desc = {
  95         {
  96             .name = "backend",
  97             .type = QEMU_OPT_STRING,
  98         },{
  99             .name = "path",
 100             .type = QEMU_OPT_STRING,
 101         },{
 102             .name = "host",
 103             .type = QEMU_OPT_STRING,
 104         },{
 105             .name = "port",
 106             .type = QEMU_OPT_STRING,
 107         },{
 108             .name = "localaddr",
 109             .type = QEMU_OPT_STRING,
 110         },{
 111             .name = "localport",
 112             .type = QEMU_OPT_STRING,
 113         },{
 114             .name = "to",
 115             .type = QEMU_OPT_NUMBER,
 116         },{
 117             .name = "ipv4",
 118             .type = QEMU_OPT_BOOL,
 119         },{
 120             .name = "ipv6",
 121             .type = QEMU_OPT_BOOL,
 122         },{
 123             .name = "wait",
 124             .type = QEMU_OPT_BOOL,
 125         },{
 126             .name = "server",
 127             .type = QEMU_OPT_BOOL,
 128         },{
 129             .name = "delay",
 130             .type = QEMU_OPT_BOOL,
 131         },{
 132             .name = "telnet",
 133             .type = QEMU_OPT_BOOL,
 134         },{
 135             .name = "width",
 136             .type = QEMU_OPT_NUMBER,
 137         },{
 138             .name = "height",
 139             .type = QEMU_OPT_NUMBER,
 140         },{
 141             .name = "cols",
 142             .type = QEMU_OPT_NUMBER,
 143         },{
 144             .name = "rows",
 145             .type = QEMU_OPT_NUMBER,
 146         },{
 147             .name = "mux",
 148             .type = QEMU_OPT_BOOL,
 149         },{
 150             .name = "signal",
 151             .type = QEMU_OPT_BOOL,
 152         },{
 153             .name = "name",
 154             .type = QEMU_OPT_STRING,
 155         },{
 156             .name = "debug",
 157             .type = QEMU_OPT_NUMBER,
 158         },
 159         { /* end of list */ }
 160     },
 161 };
 162
 163 QemuOptsList qemu_fsdev_opts = {
 164     .name = "fsdev",
 165     .implied_opt_name = "fstype",
 166     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 167     .desc = {
 168         {
 169             .name = "fstype",
 170             .type = QEMU_OPT_STRING,
 171         }, {
 172             .name = "path",
 173             .type = QEMU_OPT_STRING,
 174         }, {
 175             .name = "security_model",
 176             .type = QEMU_OPT_STRING,
 177         },
 178         { /*End of list */ }
 179     },
 180 };
 181
 182 QemuOptsList qemu_virtfs_opts = {
 183     .name = "virtfs",
 184     .implied_opt_name = "fstype",
 185     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 186     .desc = {
 187         {
 188             .name = "fstype",
 189             .type = QEMU_OPT_STRING,
 190         }, {
 191             .name = "path",
 192             .type = QEMU_OPT_STRING,
 193         }, {
 194             .name = "mount_tag",
 195             .type = QEMU_OPT_STRING,
 196         }, {
 197             .name = "security_model",
 198             .type = QEMU_OPT_STRING,
 199         },
 200
 201         { /*End of list */ }
 202     },
 203 };
 204
 205 static QemuOptsList qemu_device_opts = {
 206     .name = "device",
 207     .implied_opt_name = "driver",
 208     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 209     .desc = {
 210         /*
 211          * no elements => accept any
 212          * sanity checking will happen later
 213          * when setting device properties
 214          */
 215         { /* end of list */ }
 216     },
 217 };
 218
 219 static QemuOptsList qemu_netdev_opts = {
 220     .name = "netdev",
 221     .implied_opt_name = "type",
 222     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 223     .desc = {
 224         /*
 225          * no elements => accept any params
 226          * validation will happen later
 227          */
 228         { /* end of list */ }
 229     },
 230 };
 231
 232 static QemuOptsList qemu_net_opts = {
 233     .name = "net",
 234     .implied_opt_name = "type",
 235     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 236     .desc = {
 237         /*
 238          * no elements => accept any params
 239          * validation will happen later
 240          */
 241         { /* end of list */ }
 242     },
 243 };
 244
 245 static QemuOptsList qemu_rtc_opts = {
 246     .name = "rtc",
 247     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 248     .desc = {
 249         {
 250             .name = "base",
 251             .type = QEMU_OPT_STRING,
 252         },{
 253             .name = "clock",
 254             .type = QEMU_OPT_STRING,
 255         },{
 256             .name = "driftfix",
 257             .type = QEMU_OPT_STRING,
 258         },
 259         { /* end of list */ }
 260     },
 261 };
 262
 263 static QemuOptsList qemu_global_opts = {
 264     .name = "global",
 265     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 266     .desc = {
 267         {
 268             .name = "driver",
 269             .type = QEMU_OPT_STRING,
 270         },{
 271             .name = "property",
 272             .type = QEMU_OPT_STRING,
 273         },{
 274             .name = "value",
 275             .type = QEMU_OPT_STRING,
 276         },
 277         { /* end of list */ }
 278     },
 279 };
 280
 281 static QemuOptsList qemu_mon_opts = {
 282     .name = "mon",
 283     .implied_opt_name = "chardev",
 284     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 285     .desc = {
 286         {
 287             .name = "mode",
 288             .type = QEMU_OPT_STRING,
 289         },{
 290             .name = "chardev",
 291             .type = QEMU_OPT_STRING,
 292         },{
 293             .name = "default",
 294             .type = QEMU_OPT_BOOL,
 295         },{
 296             .name = "pretty",
 297             .type = QEMU_OPT_BOOL,
 298         },
 299         { /* end of list */ }
 300     },
 301 };
 302
 303 #ifdef CONFIG_SIMPLE_TRACE
 304 static QemuOptsList qemu_trace_opts = {
 305     .name = "trace",
 306     .implied_opt_name = "trace",
 307     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 308     .desc = {
 309         {
 310             .name = "file",
 311             .type = QEMU_OPT_STRING,
 312         },
 313         { /* end if list */ }
 314     },
 315 };
 316 #endif
 317
 318 static QemuOptsList qemu_cpudef_opts = {
 319     .name = "cpudef",
 320     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 321     .desc = {
 322         {
 323             .name = "name",
 324             .type = QEMU_OPT_STRING,
 325         },{
 326             .name = "level",
 327             .type = QEMU_OPT_NUMBER,
 328         },{
 329             .name = "vendor",
 330             .type = QEMU_OPT_STRING,
 331         },{
 332             .name = "family",
 333             .type = QEMU_OPT_NUMBER,
 334         },{
 335             .name = "model",
 336             .type = QEMU_OPT_NUMBER,
 337         },{
 338             .name = "stepping",
 339             .type = QEMU_OPT_NUMBER,
 340         },{
 341             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 342             .type = QEMU_OPT_STRING,
 343         },{
 344             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 345             .type = QEMU_OPT_STRING,
 346         },{
 347             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 348             .type = QEMU_OPT_STRING,
 349         },{
 350             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 351             .type = QEMU_OPT_STRING,
 352         },{
 353             .name = "xlevel",
 354             .type = QEMU_OPT_NUMBER,
 355         },{
 356             .name = "model_id",
 357             .type = QEMU_OPT_STRING,
 358         },{
 359             .name = "vendor_override",
 360             .type = QEMU_OPT_NUMBER,
 361         },
 362         { /* end of list */ }
 363     },
 364 };
 365
 366 QemuOptsList qemu_spice_opts = {
 367     .name = "spice",
 368     .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
 369     .desc = {
 370         {
 371             .name = "port",
 372             .type = QEMU_OPT_NUMBER,
 373         },{
 374             .name = "tls-port",
 375             .type = QEMU_OPT_NUMBER,
 376         },{
 377             .name = "addr",
 378             .type = QEMU_OPT_STRING,
 379         },{
 380             .name = "ipv4",
 381             .type = QEMU_OPT_BOOL,
 382         },{
 383             .name = "ipv6",
 384             .type = QEMU_OPT_BOOL,
 385         },{
 386             .name = "password",
 387             .type = QEMU_OPT_STRING,
 388         },{
 389             .name = "disable-ticketing",
 390             .type = QEMU_OPT_BOOL,
 391         },{
 392             .name = "x509-dir",
 393             .type = QEMU_OPT_STRING,
 394         },{
 395             .name = "x509-key-file",
 396             .type = QEMU_OPT_STRING,
 397         },{
 398             .name = "x509-key-password",
 399             .type = QEMU_OPT_STRING,
 400         },{
 401             .name = "x509-cert-file",
 402             .type = QEMU_OPT_STRING,
 403         },{
 404             .name = "x509-cacert-file",
 405             .type = QEMU_OPT_STRING,
 406         },{
 407             .name = "x509-dh-key-file",
 408             .type = QEMU_OPT_STRING,
 409         },{
 410             .name = "tls-ciphers",
 411             .type = QEMU_OPT_STRING,
 412         },{
 413             .name = "tls-channel",
 414             .type = QEMU_OPT_STRING,
 415         },{
 416             .name = "plaintext-channel",
 417             .type = QEMU_OPT_STRING,
 418         },{
 419             .name = "image-compression",
 420             .type = QEMU_OPT_STRING,
 421         },{
 422             .name = "jpeg-wan-compression",
 423             .type = QEMU_OPT_STRING,
 424         },{
 425             .name = "zlib-glz-wan-compression",
 426             .type = QEMU_OPT_STRING,
 427         },{
 428             .name = "streaming-video",
 429             .type = QEMU_OPT_STRING,
 430         },{
 431             .name = "agent-mouse",
 432             .type = QEMU_OPT_BOOL,
 433         },{
 434             .name = "playback-compression",
 435             .type = QEMU_OPT_BOOL,
 436         },
 437         { /* end if list */ }
 438     },
 439 };
 440
 441 QemuOptsList qemu_option_rom_opts = {
 442     .name = "option-rom",
 443     .implied_opt_name = "romfile",
 444     .head = QTAILQ_HEAD_INITIALIZER(qemu_option_rom_opts.head),
 445     .desc = {
 446         {
 447             .name = "bootindex",
 448             .type = QEMU_OPT_NUMBER,
 449         }, {
 450             .name = "romfile",
 451             .type = QEMU_OPT_STRING,
 452         },
 453         { /* end if list */ }
 454     },
 455 };
 456
 457 static QemuOptsList qemu_machine_opts = {
 458     .name = "machine",
 459     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 460     .desc = {
 461         {
 462             .name = "accel",
 463             .type = QEMU_OPT_STRING,
 464             .help = "accelerator list",
 465         },
 466         { /* End of list */ }
 467     },
 468 };
 469
 470 static QemuOptsList *vm_config_groups[32] = {
 471     &qemu_drive_opts,
 472     &qemu_chardev_opts,
 473     &qemu_device_opts,
 474     &qemu_netdev_opts,
 475     &qemu_net_opts,
 476     &qemu_rtc_opts,
 477     &qemu_global_opts,
 478     &qemu_mon_opts,
 479     &qemu_cpudef_opts,
 480 #ifdef CONFIG_SIMPLE_TRACE
 481     &qemu_trace_opts,
 482 #endif
 483     &qemu_option_rom_opts,
 484     &qemu_machine_opts,
 485     NULL,
 486 };
 487
 488 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 489 {
 490     int i;
 491
 492     for (i = 0; lists[i] != NULL; i++) {
 493         if (strcmp(lists[i]->name, group) == 0)
 494             break;
 495     }
 496     if (lists[i] == NULL) {
 497         error_report("there is no option group \"%s\"", group);
 498     }
 499     return lists[i];
 500 }
 501
 502 QemuOptsList *qemu_find_opts(const char *group)
 503 {
 504     return find_list(vm_config_groups, group);
 505 }
 506
 507 void qemu_add_opts(QemuOptsList *list)
 508 {
 509     int entries, i;
 510
 511     entries = ARRAY_SIZE(vm_config_groups);
 512     entries--; /* keep list NULL terminated */
 513     for (i = 0; i < entries; i++) {
 514         if (vm_config_groups[i] == NULL) {
 515             vm_config_groups[i] = list;
 516             return;
 517         }
 518     }
 519     fprintf(stderr, "ran out of space in vm_config_groups");
 520     abort();
 521 }
 522
 523 int qemu_set_option(const char *str)
 524 {
 525     char group[64], id[64], arg[64];
 526     QemuOptsList *list;
 527     QemuOpts *opts;
 528     int rc, offset;
 529
 530     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 531     if (rc < 3 || str[offset] != '=') {
 532         error_report("can't parse: \"%s\"", str);
 533         return -1;
 534     }
 535
 536     list = qemu_find_opts(group);
 537     if (list == NULL) {
 538         return -1;
 539     }
 540
 541     opts = qemu_opts_find(list, id);
 542     if (!opts) {
 543         error_report("there is no %s \"%s\" defined",
 544                      list->name, id);
 545         return -1;
 546     }
 547
 548     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 549         return -1;
 550     }
 551     return 0;
 552 }
 553
 554 int qemu_global_option(const char *str)
 555 {
 556     char driver[64], property[64];
 557     QemuOpts *opts;
 558     int rc, offset;
 559
 560     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 561     if (rc < 2 || str[offset] != '=') {
 562         error_report("can't parse: \"%s\"", str);
 563         return -1;
 564     }
 565
 566     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 567     qemu_opt_set(opts, "driver", driver);
 568     qemu_opt_set(opts, "property", property);
 569     qemu_opt_set(opts, "value", str+offset+1);
 570     return 0;
 571 }
 572
 573 struct ConfigWriteData {
 574     QemuOptsList *list;
 575     FILE *fp;
 576 };
 577
 578 static int config_write_opt(const char *name, const char *value, void *opaque)
 579 {
 580     struct ConfigWriteData *data = opaque;
 581
 582     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 583     return 0;
 584 }
 585
 586 static int config_write_opts(QemuOpts *opts, void *opaque)
 587 {
 588     struct ConfigWriteData *data = opaque;
 589     const char *id = qemu_opts_id(opts);
 590
 591     if (id) {
 592         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 593     } else {
 594         fprintf(data->fp, "[%s]\n", data->list->name);
 595     }
 596     qemu_opt_foreach(opts, config_write_opt, data, 0);
 597     fprintf(data->fp, "\n");
 598     return 0;
 599 }
 600
 601 void qemu_config_write(FILE *fp)
 602 {
 603     struct ConfigWriteData data = { .fp = fp };
 604     QemuOptsList **lists = vm_config_groups;
 605     int i;
 606
 607     fprintf(fp, "# qemu config file\n\n");
 608     for (i = 0; lists[i] != NULL; i++) {
 609         data.list = lists[i];
 610         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 611     }
 612 }
 613
 614 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 615 {
 616     char line[1024], group[64], id[64], arg[64], value[1024];
 617     Location loc;
 618     QemuOptsList *list = NULL;
 619     QemuOpts *opts = NULL;
 620     int res = -1, lno = 0;
 621
 622     loc_push_none(&loc);
 623     while (fgets(line, sizeof(line), fp) != NULL) {
 624         loc_set_file(fname, ++lno);
 625         if (line[0] == '\n') {
 626             /* skip empty lines */
 627             continue;
 628         }
 629         if (line[0] == '#') {
 630             /* comment */
 631             continue;
 632         }
 633         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 634             /* group with id */
 635             list = find_list(lists, group);
 636             if (list == NULL)
 637                 goto out;
 638             opts = qemu_opts_create(list, id, 1);
 639             continue;
 640         }
 641         if (sscanf(line, "[%63[^]]]", group) == 1) {
 642             /* group without id */
 643             list = find_list(lists, group);
 644             if (list == NULL)
 645                 goto out;
 646             opts = qemu_opts_create(list, NULL, 0);
 647             continue;
 648         }
 649         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 650             /* arg = value */
 651             if (opts == NULL) {
 652                 error_report("no group defined");
 653                 goto out;
 654             }
 655             if (qemu_opt_set(opts, arg, value) != 0) {
 656                 goto out;
 657             }
 658             continue;
 659         }
 660         error_report("parse error");
 661         goto out;
 662     }
 663     if (ferror(fp)) {
 664         error_report("error reading file");
 665         goto out;
 666     }
 667     res = 0;
 668 out:
 669     loc_pop(&loc);
 670     return res;
 671 }
 672
 673 int qemu_read_config_file(const char *filename)
 674 {
 675     FILE *f = fopen(filename, "r");
 676     int ret;
 677
 678     if (f == NULL) {
 679         return -errno;
 680     }
 681
 682     ret = qemu_config_parse(f, vm_config_groups, filename);
 683     fclose(f);
 684
 685     if (ret == 0) {
 686         return 0;
 687     } else {
 688         return -EINVAL;
 689     }
 690 }