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