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 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 if list */ }
  84     },
  85 };
  86
  87 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         { /* end if list */ }
 151     },
 152 };
 153
 154 #ifdef CONFIG_LINUX
 155 QemuOptsList qemu_fsdev_opts = {
 156     .name = "fsdev",
 157     .implied_opt_name = "fstype",
 158     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 159     .desc = {
 160         {
 161             .name = "fstype",
 162             .type = QEMU_OPT_STRING,
 163         }, {
 164             .name = "path",
 165             .type = QEMU_OPT_STRING,
 166         }, {
 167             .name = "security_model",
 168             .type = QEMU_OPT_STRING,
 169         },
 170         { /*End of list */ }
 171     },
 172 };
 173 #endif
 174
 175 #ifdef CONFIG_LINUX
 176 QemuOptsList qemu_virtfs_opts = {
 177     .name = "virtfs",
 178     .implied_opt_name = "fstype",
 179     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 180     .desc = {
 181         {
 182             .name = "fstype",
 183             .type = QEMU_OPT_STRING,
 184         }, {
 185             .name = "path",
 186             .type = QEMU_OPT_STRING,
 187         }, {
 188             .name = "mount_tag",
 189             .type = QEMU_OPT_STRING,
 190         }, {
 191             .name = "security_model",
 192             .type = QEMU_OPT_STRING,
 193         },
 194
 195         { /*End of list */ }
 196     },
 197 };
 198 #endif
 199
 200 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 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 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 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 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 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 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[] = {
 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 int qemu_set_option(const char *str)
 376 {
 377     char group[64], id[64], arg[64];
 378     QemuOptsList *list;
 379     QemuOpts *opts;
 380     int rc, offset;
 381
 382     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 383     if (rc < 3 || str[offset] != '=') {
 384         error_report("can't parse: \"%s\"", str);
 385         return -1;
 386     }
 387
 388     list = qemu_find_opts(group);
 389     if (list == NULL) {
 390         return -1;
 391     }
 392
 393     opts = qemu_opts_find(list, id);
 394     if (!opts) {
 395         error_report("there is no %s \"%s\" defined",
 396                      list->name, id);
 397         return -1;
 398     }
 399
 400     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 401         return -1;
 402     }
 403     return 0;
 404 }
 405
 406 int qemu_global_option(const char *str)
 407 {
 408     char driver[64], property[64];
 409     QemuOpts *opts;
 410     int rc, offset;
 411
 412     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 413     if (rc < 2 || str[offset] != '=') {
 414         error_report("can't parse: \"%s\"", str);
 415         return -1;
 416     }
 417
 418     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 419     qemu_opt_set(opts, "driver", driver);
 420     qemu_opt_set(opts, "property", property);
 421     qemu_opt_set(opts, "value", str+offset+1);
 422     return 0;
 423 }
 424
 425 struct ConfigWriteData {
 426     QemuOptsList *list;
 427     FILE *fp;
 428 };
 429
 430 static int config_write_opt(const char *name, const char *value, void *opaque)
 431 {
 432     struct ConfigWriteData *data = opaque;
 433
 434     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 435     return 0;
 436 }
 437
 438 static int config_write_opts(QemuOpts *opts, void *opaque)
 439 {
 440     struct ConfigWriteData *data = opaque;
 441     const char *id = qemu_opts_id(opts);
 442
 443     if (id) {
 444         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 445     } else {
 446         fprintf(data->fp, "[%s]\n", data->list->name);
 447     }
 448     qemu_opt_foreach(opts, config_write_opt, data, 0);
 449     fprintf(data->fp, "\n");
 450     return 0;
 451 }
 452
 453 void qemu_config_write(FILE *fp)
 454 {
 455     struct ConfigWriteData data = { .fp = fp };
 456     QemuOptsList **lists = vm_config_groups;
 457     int i;
 458
 459     fprintf(fp, "# qemu config file\n\n");
 460     for (i = 0; lists[i] != NULL; i++) {
 461         data.list = lists[i];
 462         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 463     }
 464 }
 465
 466 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 467 {
 468     char line[1024], group[64], id[64], arg[64], value[1024];
 469     Location loc;
 470     QemuOptsList *list = NULL;
 471     QemuOpts *opts = NULL;
 472     int res = -1, lno = 0;
 473
 474     loc_push_none(&loc);
 475     while (fgets(line, sizeof(line), fp) != NULL) {
 476         loc_set_file(fname, ++lno);
 477         if (line[0] == '\n') {
 478             /* skip empty lines */
 479             continue;
 480         }
 481         if (line[0] == '#') {
 482             /* comment */
 483             continue;
 484         }
 485         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 486             /* group with id */
 487             list = find_list(lists, group);
 488             if (list == NULL)
 489                 goto out;
 490             opts = qemu_opts_create(list, id, 1);
 491             continue;
 492         }
 493         if (sscanf(line, "[%63[^]]]", group) == 1) {
 494             /* group without id */
 495             list = find_list(lists, group);
 496             if (list == NULL)
 497                 goto out;
 498             opts = qemu_opts_create(list, NULL, 0);
 499             continue;
 500         }
 501         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 502             /* arg = value */
 503             if (opts == NULL) {
 504                 error_report("no group defined");
 505                 goto out;
 506             }
 507             if (qemu_opt_set(opts, arg, value) != 0) {
 508                 goto out;
 509             }
 510             continue;
 511         }
 512         error_report("parse error");
 513         goto out;
 514     }
 515     if (ferror(fp)) {
 516         error_report("error reading file");
 517         goto out;
 518     }
 519     res = 0;
 520 out:
 521     loc_pop(&loc);
 522     return res;
 523 }
 524
 525 int qemu_read_config_file(const char *filename)
 526 {
 527     FILE *f = fopen(filename, "r");
 528     int ret;
 529
 530     if (f == NULL) {
 531         return -errno;
 532     }
 533
 534     ret = qemu_config_parse(f, vm_config_groups, filename);
 535     fclose(f);
 536
 537     if (ret == 0) {
 538         return 0;
 539     } else {
 540         return -EINVAL;
 541     }
 542 }