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