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