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 if 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 if 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 if 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 if 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 if 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 if list */ }
 292     },
 293 };
 294
 295 static QemuOptsList qemu_cpudef_opts = {
 296     .name = "cpudef",
 297     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 298     .desc = {
 299         {
 300             .name = "name",
 301             .type = QEMU_OPT_STRING,
 302         },{
 303             .name = "level",
 304             .type = QEMU_OPT_NUMBER,
 305         },{
 306             .name = "vendor",
 307             .type = QEMU_OPT_STRING,
 308         },{
 309             .name = "family",
 310             .type = QEMU_OPT_NUMBER,
 311         },{
 312             .name = "model",
 313             .type = QEMU_OPT_NUMBER,
 314         },{
 315             .name = "stepping",
 316             .type = QEMU_OPT_NUMBER,
 317         },{
 318             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 319             .type = QEMU_OPT_STRING,
 320         },{
 321             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 322             .type = QEMU_OPT_STRING,
 323         },{
 324             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 325             .type = QEMU_OPT_STRING,
 326         },{
 327             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 328             .type = QEMU_OPT_STRING,
 329         },{
 330             .name = "xlevel",
 331             .type = QEMU_OPT_NUMBER,
 332         },{
 333             .name = "model_id",
 334             .type = QEMU_OPT_STRING,
 335         },{
 336             .name = "vendor_override",
 337             .type = QEMU_OPT_NUMBER,
 338         },
 339         { /* end of list */ }
 340     },
 341 };
 342
 343 static QemuOptsList *vm_config_groups[32] = {
 344     &qemu_drive_opts,
 345     &qemu_chardev_opts,
 346     &qemu_device_opts,
 347     &qemu_netdev_opts,
 348     &qemu_net_opts,
 349     &qemu_rtc_opts,
 350     &qemu_global_opts,
 351     &qemu_mon_opts,
 352     &qemu_cpudef_opts,
 353     NULL,
 354 };
 355
 356 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 357 {
 358     int i;
 359
 360     for (i = 0; lists[i] != NULL; i++) {
 361         if (strcmp(lists[i]->name, group) == 0)
 362             break;
 363     }
 364     if (lists[i] == NULL) {
 365         error_report("there is no option group \"%s\"", group);
 366     }
 367     return lists[i];
 368 }
 369
 370 QemuOptsList *qemu_find_opts(const char *group)
 371 {
 372     return find_list(vm_config_groups, group);
 373 }
 374
 375 void qemu_add_opts(QemuOptsList *list)
 376 {
 377     int entries, i;
 378
 379     entries = ARRAY_SIZE(vm_config_groups);
 380     entries--; /* keep list NULL terminated */
 381     for (i = 0; i < entries; i++) {
 382         if (vm_config_groups[i] == NULL) {
 383             vm_config_groups[i] = list;
 384             return;
 385         }
 386     }
 387     fprintf(stderr, "ran out of space in vm_config_groups");
 388     abort();
 389 }
 390
 391 int qemu_set_option(const char *str)
 392 {
 393     char group[64], id[64], arg[64];
 394     QemuOptsList *list;
 395     QemuOpts *opts;
 396     int rc, offset;
 397
 398     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 399     if (rc < 3 || str[offset] != '=') {
 400         error_report("can't parse: \"%s\"", str);
 401         return -1;
 402     }
 403
 404     list = qemu_find_opts(group);
 405     if (list == NULL) {
 406         return -1;
 407     }
 408
 409     opts = qemu_opts_find(list, id);
 410     if (!opts) {
 411         error_report("there is no %s \"%s\" defined",
 412                      list->name, id);
 413         return -1;
 414     }
 415
 416     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 417         return -1;
 418     }
 419     return 0;
 420 }
 421
 422 int qemu_global_option(const char *str)
 423 {
 424     char driver[64], property[64];
 425     QemuOpts *opts;
 426     int rc, offset;
 427
 428     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 429     if (rc < 2 || str[offset] != '=') {
 430         error_report("can't parse: \"%s\"", str);
 431         return -1;
 432     }
 433
 434     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 435     qemu_opt_set(opts, "driver", driver);
 436     qemu_opt_set(opts, "property", property);
 437     qemu_opt_set(opts, "value", str+offset+1);
 438     return 0;
 439 }
 440
 441 struct ConfigWriteData {
 442     QemuOptsList *list;
 443     FILE *fp;
 444 };
 445
 446 static int config_write_opt(const char *name, const char *value, void *opaque)
 447 {
 448     struct ConfigWriteData *data = opaque;
 449
 450     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 451     return 0;
 452 }
 453
 454 static int config_write_opts(QemuOpts *opts, void *opaque)
 455 {
 456     struct ConfigWriteData *data = opaque;
 457     const char *id = qemu_opts_id(opts);
 458
 459     if (id) {
 460         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 461     } else {
 462         fprintf(data->fp, "[%s]\n", data->list->name);
 463     }
 464     qemu_opt_foreach(opts, config_write_opt, data, 0);
 465     fprintf(data->fp, "\n");
 466     return 0;
 467 }
 468
 469 void qemu_config_write(FILE *fp)
 470 {
 471     struct ConfigWriteData data = { .fp = fp };
 472     QemuOptsList **lists = vm_config_groups;
 473     int i;
 474
 475     fprintf(fp, "# qemu config file\n\n");
 476     for (i = 0; lists[i] != NULL; i++) {
 477         data.list = lists[i];
 478         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 479     }
 480 }
 481
 482 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 483 {
 484     char line[1024], group[64], id[64], arg[64], value[1024];
 485     Location loc;
 486     QemuOptsList *list = NULL;
 487     QemuOpts *opts = NULL;
 488     int res = -1, lno = 0;
 489
 490     loc_push_none(&loc);
 491     while (fgets(line, sizeof(line), fp) != NULL) {
 492         loc_set_file(fname, ++lno);
 493         if (line[0] == '\n') {
 494             /* skip empty lines */
 495             continue;
 496         }
 497         if (line[0] == '#') {
 498             /* comment */
 499             continue;
 500         }
 501         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 502             /* group with id */
 503             list = find_list(lists, group);
 504             if (list == NULL)
 505                 goto out;
 506             opts = qemu_opts_create(list, id, 1);
 507             continue;
 508         }
 509         if (sscanf(line, "[%63[^]]]", group) == 1) {
 510             /* group without id */
 511             list = find_list(lists, group);
 512             if (list == NULL)
 513                 goto out;
 514             opts = qemu_opts_create(list, NULL, 0);
 515             continue;
 516         }
 517         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 518             /* arg = value */
 519             if (opts == NULL) {
 520                 error_report("no group defined");
 521                 goto out;
 522             }
 523             if (qemu_opt_set(opts, arg, value) != 0) {
 524                 goto out;
 525             }
 526             continue;
 527         }
 528         error_report("parse error");
 529         goto out;
 530     }
 531     if (ferror(fp)) {
 532         error_report("error reading file");
 533         goto out;
 534     }
 535     res = 0;
 536 out:
 537     loc_pop(&loc);
 538     return res;
 539 }
 540
 541 int qemu_read_config_file(const char *filename)
 542 {
 543     FILE *f = fopen(filename, "r");
 544     int ret;
 545
 546     if (f == NULL) {
 547         return -errno;
 548     }
 549
 550     ret = qemu_config_parse(f, vm_config_groups, filename);
 551     fclose(f);
 552
 553     if (ret == 0) {
 554         return 0;
 555     } else {
 556         return -EINVAL;
 557     }
 558 }