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         { /*End of list */ }
 168     },
 169 };
 170 #endif
 171
 172 #ifdef CONFIG_LINUX
 173 QemuOptsList qemu_virtfs_opts = {
 174     .name = "virtfs",
 175     .implied_opt_name = "fstype",
 176     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 177     .desc = {
 178         {
 179             .name = "fstype",
 180             .type = QEMU_OPT_STRING,
 181         }, {
 182             .name = "path",
 183             .type = QEMU_OPT_STRING,
 184         }, {
 185             .name = "mount_tag",
 186             .type = QEMU_OPT_STRING,
 187         },
 188
 189         { /*End of list */ }
 190     },
 191 };
 192 #endif
 193
 194 QemuOptsList qemu_device_opts = {
 195     .name = "device",
 196     .implied_opt_name = "driver",
 197     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 198     .desc = {
 199         /*
 200          * no elements => accept any
 201          * sanity checking will happen later
 202          * when setting device properties
 203          */
 204         { /* end if list */ }
 205     },
 206 };
 207
 208 QemuOptsList qemu_netdev_opts = {
 209     .name = "netdev",
 210     .implied_opt_name = "type",
 211     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 212     .desc = {
 213         /*
 214          * no elements => accept any params
 215          * validation will happen later
 216          */
 217         { /* end of list */ }
 218     },
 219 };
 220
 221 QemuOptsList qemu_net_opts = {
 222     .name = "net",
 223     .implied_opt_name = "type",
 224     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 225     .desc = {
 226         /*
 227          * no elements => accept any params
 228          * validation will happen later
 229          */
 230         { /* end of list */ }
 231     },
 232 };
 233
 234 QemuOptsList qemu_rtc_opts = {
 235     .name = "rtc",
 236     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 237     .desc = {
 238         {
 239             .name = "base",
 240             .type = QEMU_OPT_STRING,
 241         },{
 242             .name = "clock",
 243             .type = QEMU_OPT_STRING,
 244 #ifdef TARGET_I386
 245         },{
 246             .name = "driftfix",
 247             .type = QEMU_OPT_STRING,
 248 #endif
 249         },
 250         { /* end if list */ }
 251     },
 252 };
 253
 254 QemuOptsList qemu_global_opts = {
 255     .name = "global",
 256     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 257     .desc = {
 258         {
 259             .name = "driver",
 260             .type = QEMU_OPT_STRING,
 261         },{
 262             .name = "property",
 263             .type = QEMU_OPT_STRING,
 264         },{
 265             .name = "value",
 266             .type = QEMU_OPT_STRING,
 267         },
 268         { /* end if list */ }
 269     },
 270 };
 271
 272 QemuOptsList qemu_mon_opts = {
 273     .name = "mon",
 274     .implied_opt_name = "chardev",
 275     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 276     .desc = {
 277         {
 278             .name = "mode",
 279             .type = QEMU_OPT_STRING,
 280         },{
 281             .name = "chardev",
 282             .type = QEMU_OPT_STRING,
 283         },{
 284             .name = "default",
 285             .type = QEMU_OPT_BOOL,
 286         },
 287         { /* end if list */ }
 288     },
 289 };
 290
 291 QemuOptsList qemu_cpudef_opts = {
 292     .name = "cpudef",
 293     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 294     .desc = {
 295         {
 296             .name = "name",
 297             .type = QEMU_OPT_STRING,
 298         },{
 299             .name = "level",
 300             .type = QEMU_OPT_NUMBER,
 301         },{
 302             .name = "vendor",
 303             .type = QEMU_OPT_STRING,
 304         },{
 305             .name = "family",
 306             .type = QEMU_OPT_NUMBER,
 307         },{
 308             .name = "model",
 309             .type = QEMU_OPT_NUMBER,
 310         },{
 311             .name = "stepping",
 312             .type = QEMU_OPT_NUMBER,
 313         },{
 314             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 315             .type = QEMU_OPT_STRING,
 316         },{
 317             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 318             .type = QEMU_OPT_STRING,
 319         },{
 320             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 321             .type = QEMU_OPT_STRING,
 322         },{
 323             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 324             .type = QEMU_OPT_STRING,
 325         },{
 326             .name = "xlevel",
 327             .type = QEMU_OPT_NUMBER,
 328         },{
 329             .name = "model_id",
 330             .type = QEMU_OPT_STRING,
 331         },{
 332             .name = "vendor_override",
 333             .type = QEMU_OPT_NUMBER,
 334         },
 335         { /* end of list */ }
 336     },
 337 };
 338
 339 QemuOptsList qemu_machine_opts = {
 340     .name = "machine",
 341     .head = QTAILQ_HEAD_INITIALIZER(qemu_machine_opts.head),
 342     .desc = {
 343         { /* end of list */ }
 344     },
 345 };
 346
 347 static QemuOptsList *vm_config_groups[] = {
 348     &qemu_drive_opts,
 349     &qemu_chardev_opts,
 350     &qemu_device_opts,
 351     &qemu_netdev_opts,
 352     &qemu_net_opts,
 353     &qemu_rtc_opts,
 354     &qemu_global_opts,
 355     &qemu_mon_opts,
 356     &qemu_cpudef_opts,
 357     &qemu_machine_opts,
 358     NULL,
 359 };
 360
 361 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 362 {
 363     int i;
 364
 365     for (i = 0; lists[i] != NULL; i++) {
 366         if (strcmp(lists[i]->name, group) == 0)
 367             break;
 368     }
 369     if (lists[i] == NULL) {
 370         error_report("there is no option group \"%s\"", group);
 371     }
 372     return lists[i];
 373 }
 374
 375 QemuOptsList *qemu_find_opts(const char *group)
 376 {
 377     return find_list(vm_config_groups, group);
 378 }
 379
 380 int qemu_set_option(const char *str)
 381 {
 382     char group[64], id[64], arg[64];
 383     QemuOptsList *list;
 384     QemuOpts *opts;
 385     int rc, offset;
 386
 387     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 388     if (rc < 3 || str[offset] != '=') {
 389         error_report("can't parse: \"%s\"", str);
 390         return -1;
 391     }
 392
 393     list = qemu_find_opts(group);
 394     if (list == NULL) {
 395         return -1;
 396     }
 397
 398     opts = qemu_opts_find(list, id);
 399     if (!opts) {
 400         error_report("there is no %s \"%s\" defined",
 401                      list->name, id);
 402         return -1;
 403     }
 404
 405     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 406         return -1;
 407     }
 408     return 0;
 409 }
 410
 411 int qemu_global_option(const char *str)
 412 {
 413     char driver[64], property[64];
 414     QemuOpts *opts;
 415     int rc, offset;
 416
 417     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 418     if (rc < 2 || str[offset] != '=') {
 419         error_report("can't parse: \"%s\"", str);
 420         return -1;
 421     }
 422
 423     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 424     qemu_opt_set(opts, "driver", driver);
 425     qemu_opt_set(opts, "property", property);
 426     qemu_opt_set(opts, "value", str+offset+1);
 427     return 0;
 428 }
 429
 430 struct ConfigWriteData {
 431     QemuOptsList *list;
 432     FILE *fp;
 433 };
 434
 435 static int config_write_opt(const char *name, const char *value, void *opaque)
 436 {
 437     struct ConfigWriteData *data = opaque;
 438
 439     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 440     return 0;
 441 }
 442
 443 static int config_write_opts(QemuOpts *opts, void *opaque)
 444 {
 445     struct ConfigWriteData *data = opaque;
 446     const char *id = qemu_opts_id(opts);
 447
 448     if (id) {
 449         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 450     } else {
 451         fprintf(data->fp, "[%s]\n", data->list->name);
 452     }
 453     qemu_opt_foreach(opts, config_write_opt, data, 0);
 454     fprintf(data->fp, "\n");
 455     return 0;
 456 }
 457
 458 void qemu_config_write(FILE *fp)
 459 {
 460     struct ConfigWriteData data = { .fp = fp };
 461     QemuOptsList **lists = vm_config_groups;
 462     int i;
 463
 464     fprintf(fp, "# qemu config file\n\n");
 465     for (i = 0; lists[i] != NULL; i++) {
 466         data.list = lists[i];
 467         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 468     }
 469 }
 470
 471 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 472 {
 473     char line[1024], group[64], id[64], arg[64], value[1024];
 474     Location loc;
 475     QemuOptsList *list = NULL;
 476     QemuOpts *opts = NULL;
 477     int res = -1, lno = 0;
 478
 479     loc_push_none(&loc);
 480     while (fgets(line, sizeof(line), fp) != NULL) {
 481         loc_set_file(fname, ++lno);
 482         if (line[0] == '\n') {
 483             /* skip empty lines */
 484             continue;
 485         }
 486         if (line[0] == '#') {
 487             /* comment */
 488             continue;
 489         }
 490         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 491             /* group with id */
 492             list = find_list(lists, group);
 493             if (list == NULL)
 494                 goto out;
 495             opts = qemu_opts_create(list, id, 1);
 496             continue;
 497         }
 498         if (sscanf(line, "[%63[^]]]", group) == 1) {
 499             /* group without id */
 500             list = find_list(lists, group);
 501             if (list == NULL)
 502                 goto out;
 503             opts = qemu_opts_create(list, NULL, 0);
 504             continue;
 505         }
 506         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 507             /* arg = value */
 508             if (opts == NULL) {
 509                 error_report("no group defined");
 510                 goto out;
 511             }
 512             if (qemu_opt_set(opts, arg, value) != 0) {
 513                 goto out;
 514             }
 515             continue;
 516         }
 517         error_report("parse error");
 518         goto out;
 519     }
 520     if (ferror(fp)) {
 521         error_report("error reading file");
 522         goto out;
 523     }
 524     res = 0;
 525 out:
 526     loc_pop(&loc);
 527     return res;
 528 }
 529
 530 int qemu_read_config_file(const char *filename)
 531 {
 532     FILE *f = fopen(filename, "r");
 533     int ret;
 534
 535     if (f == NULL) {
 536         return -errno;
 537     }
 538
 539     ret = qemu_config_parse(f, vm_config_groups, filename);
 540     fclose(f);
 541
 542     if (ret == 0) {
 543         return 0;
 544     } else {
 545         return -EINVAL;
 546     }
 547 }