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     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  90     .desc = {
  91         {
  92             .name = "backend",
  93             .type = QEMU_OPT_STRING,
  94         },{
  95             .name = "path",
  96             .type = QEMU_OPT_STRING,
  97         },{
  98             .name = "host",
  99             .type = QEMU_OPT_STRING,
 100         },{
 101             .name = "port",
 102             .type = QEMU_OPT_STRING,
 103         },{
 104             .name = "localaddr",
 105             .type = QEMU_OPT_STRING,
 106         },{
 107             .name = "localport",
 108             .type = QEMU_OPT_STRING,
 109         },{
 110             .name = "to",
 111             .type = QEMU_OPT_NUMBER,
 112         },{
 113             .name = "ipv4",
 114             .type = QEMU_OPT_BOOL,
 115         },{
 116             .name = "ipv6",
 117             .type = QEMU_OPT_BOOL,
 118         },{
 119             .name = "wait",
 120             .type = QEMU_OPT_BOOL,
 121         },{
 122             .name = "server",
 123             .type = QEMU_OPT_BOOL,
 124         },{
 125             .name = "delay",
 126             .type = QEMU_OPT_BOOL,
 127         },{
 128             .name = "telnet",
 129             .type = QEMU_OPT_BOOL,
 130         },{
 131             .name = "width",
 132             .type = QEMU_OPT_NUMBER,
 133         },{
 134             .name = "height",
 135             .type = QEMU_OPT_NUMBER,
 136         },{
 137             .name = "cols",
 138             .type = QEMU_OPT_NUMBER,
 139         },{
 140             .name = "rows",
 141             .type = QEMU_OPT_NUMBER,
 142         },{
 143             .name = "mux",
 144             .type = QEMU_OPT_BOOL,
 145         },{
 146             .name = "signal",
 147             .type = QEMU_OPT_BOOL,
 148         },
 149         { /* end if list */ }
 150     },
 151 };
 152
 153 QemuOptsList qemu_device_opts = {
 154     .name = "device",
 155     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 156     .desc = {
 157         /*
 158          * no elements => accept any
 159          * sanity checking will happen later
 160          * when setting device properties
 161          */
 162         { /* end if list */ }
 163     },
 164 };
 165
 166 QemuOptsList qemu_netdev_opts = {
 167     .name = "netdev",
 168     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 169     .desc = {
 170         /*
 171          * no elements => accept any params
 172          * validation will happen later
 173          */
 174         { /* end of list */ }
 175     },
 176 };
 177
 178 QemuOptsList qemu_net_opts = {
 179     .name = "net",
 180     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 181     .desc = {
 182         /*
 183          * no elements => accept any params
 184          * validation will happen later
 185          */
 186         { /* end of list */ }
 187     },
 188 };
 189
 190 QemuOptsList qemu_rtc_opts = {
 191     .name = "rtc",
 192     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 193     .desc = {
 194         {
 195             .name = "base",
 196             .type = QEMU_OPT_STRING,
 197         },{
 198             .name = "clock",
 199             .type = QEMU_OPT_STRING,
 200 #ifdef TARGET_I386
 201         },{
 202             .name = "driftfix",
 203             .type = QEMU_OPT_STRING,
 204 #endif
 205         },
 206         { /* end if list */ }
 207     },
 208 };
 209
 210 QemuOptsList qemu_global_opts = {
 211     .name = "global",
 212     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 213     .desc = {
 214         {
 215             .name = "driver",
 216             .type = QEMU_OPT_STRING,
 217         },{
 218             .name = "property",
 219             .type = QEMU_OPT_STRING,
 220         },{
 221             .name = "value",
 222             .type = QEMU_OPT_STRING,
 223         },
 224         { /* end if list */ }
 225     },
 226 };
 227
 228 QemuOptsList qemu_mon_opts = {
 229     .name = "mon",
 230     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 231     .desc = {
 232         {
 233             .name = "mode",
 234             .type = QEMU_OPT_STRING,
 235         },{
 236             .name = "chardev",
 237             .type = QEMU_OPT_STRING,
 238         },{
 239             .name = "default",
 240             .type = QEMU_OPT_BOOL,
 241         },
 242         { /* end if list */ }
 243     },
 244 };
 245
 246 QemuOptsList qemu_cpudef_opts = {
 247     .name = "cpudef",
 248     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 249     .desc = {
 250         {
 251             .name = "name",
 252             .type = QEMU_OPT_STRING,
 253         },{
 254             .name = "level",
 255             .type = QEMU_OPT_NUMBER,
 256         },{
 257             .name = "vendor",
 258             .type = QEMU_OPT_STRING,
 259         },{
 260             .name = "family",
 261             .type = QEMU_OPT_NUMBER,
 262         },{
 263             .name = "model",
 264             .type = QEMU_OPT_NUMBER,
 265         },{
 266             .name = "stepping",
 267             .type = QEMU_OPT_NUMBER,
 268         },{
 269             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 270             .type = QEMU_OPT_STRING,
 271         },{
 272             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 273             .type = QEMU_OPT_STRING,
 274         },{
 275             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 276             .type = QEMU_OPT_STRING,
 277         },{
 278             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 279             .type = QEMU_OPT_STRING,
 280         },{
 281             .name = "xlevel",
 282             .type = QEMU_OPT_NUMBER,
 283         },{
 284             .name = "model_id",
 285             .type = QEMU_OPT_STRING,
 286         },{
 287             .name = "vendor_override",
 288             .type = QEMU_OPT_NUMBER,
 289         },
 290         { /* end of list */ }
 291     },
 292 };
 293
 294 static QemuOptsList *lists[] = {
 295     &qemu_drive_opts,
 296     &qemu_chardev_opts,
 297     &qemu_device_opts,
 298     &qemu_netdev_opts,
 299     &qemu_net_opts,
 300     &qemu_rtc_opts,
 301     &qemu_global_opts,
 302     &qemu_mon_opts,
 303     &qemu_cpudef_opts,
 304     NULL,
 305 };
 306
 307 static QemuOptsList *find_list(const char *group)
 308 {
 309     int i;
 310
 311     for (i = 0; lists[i] != NULL; i++) {
 312         if (strcmp(lists[i]->name, group) == 0)
 313             break;
 314     }
 315     if (lists[i] == NULL) {
 316         error_report("there is no option group \"%s\"", group);
 317     }
 318     return lists[i];
 319 }
 320
 321 int qemu_set_option(const char *str)
 322 {
 323     char group[64], id[64], arg[64];
 324     QemuOptsList *list;
 325     QemuOpts *opts;
 326     int rc, offset;
 327
 328     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 329     if (rc < 3 || str[offset] != '=') {
 330         error_report("can't parse: \"%s\"", str);
 331         return -1;
 332     }
 333
 334     list = find_list(group);
 335     if (list == NULL) {
 336         return -1;
 337     }
 338
 339     opts = qemu_opts_find(list, id);
 340     if (!opts) {
 341         error_report("there is no %s \"%s\" defined",
 342                      list->name, id);
 343         return -1;
 344     }
 345
 346     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 347         return -1;
 348     }
 349     return 0;
 350 }
 351
 352 int qemu_global_option(const char *str)
 353 {
 354     char driver[64], property[64];
 355     QemuOpts *opts;
 356     int rc, offset;
 357
 358     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 359     if (rc < 2 || str[offset] != '=') {
 360         error_report("can't parse: \"%s\"", str);
 361         return -1;
 362     }
 363
 364     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 365     qemu_opt_set(opts, "driver", driver);
 366     qemu_opt_set(opts, "property", property);
 367     qemu_opt_set(opts, "value", str+offset+1);
 368     return 0;
 369 }
 370
 371 static int qemu_add_one_global(QemuOpts *opts, void *opaque)
 372 {
 373     GlobalProperty *g;
 374
 375     g = qemu_mallocz(sizeof(*g));
 376     g->driver   = qemu_opt_get(opts, "driver");
 377     g->property = qemu_opt_get(opts, "property");
 378     g->value    = qemu_opt_get(opts, "value");
 379     qdev_prop_register_global(g);
 380     return 0;
 381 }
 382
 383 void qemu_add_globals(void)
 384 {
 385     qemu_opts_foreach(&qemu_global_opts, qemu_add_one_global, NULL, 0);
 386 }
 387
 388 struct ConfigWriteData {
 389     QemuOptsList *list;
 390     FILE *fp;
 391 };
 392
 393 static int config_write_opt(const char *name, const char *value, void *opaque)
 394 {
 395     struct ConfigWriteData *data = opaque;
 396
 397     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 398     return 0;
 399 }
 400
 401 static int config_write_opts(QemuOpts *opts, void *opaque)
 402 {
 403     struct ConfigWriteData *data = opaque;
 404     const char *id = qemu_opts_id(opts);
 405
 406     if (id) {
 407         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 408     } else {
 409         fprintf(data->fp, "[%s]\n", data->list->name);
 410     }
 411     qemu_opt_foreach(opts, config_write_opt, data, 0);
 412     fprintf(data->fp, "\n");
 413     return 0;
 414 }
 415
 416 void qemu_config_write(FILE *fp)
 417 {
 418     struct ConfigWriteData data = { .fp = fp };
 419     int i;
 420
 421     fprintf(fp, "# qemu config file\n\n");
 422     for (i = 0; lists[i] != NULL; i++) {
 423         data.list = lists[i];
 424         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 425     }
 426 }
 427
 428 int qemu_config_parse(FILE *fp, const char *fname)
 429 {
 430     char line[1024], group[64], id[64], arg[64], value[1024];
 431     Location loc;
 432     QemuOptsList *list = NULL;
 433     QemuOpts *opts = NULL;
 434     int res = -1, lno = 0;
 435
 436     loc_push_none(&loc);
 437     while (fgets(line, sizeof(line), fp) != NULL) {
 438         loc_set_file(fname, ++lno);
 439         if (line[0] == '\n') {
 440             /* skip empty lines */
 441             continue;
 442         }
 443         if (line[0] == '#') {
 444             /* comment */
 445             continue;
 446         }
 447         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 448             /* group with id */
 449             list = find_list(group);
 450             if (list == NULL)
 451                 goto out;
 452             opts = qemu_opts_create(list, id, 1);
 453             continue;
 454         }
 455         if (sscanf(line, "[%63[^]]]", group) == 1) {
 456             /* group without id */
 457             list = find_list(group);
 458             if (list == NULL)
 459                 goto out;
 460             opts = qemu_opts_create(list, NULL, 0);
 461             continue;
 462         }
 463         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 464             /* arg = value */
 465             if (opts == NULL) {
 466                 error_report("no group defined");
 467                 goto out;
 468             }
 469             if (qemu_opt_set(opts, arg, value) != 0) {
 470                 error_report("failed to set \"%s\" for %s", arg, group);
 471                 goto out;
 472             }
 473             continue;
 474         }
 475         error_report("parse error");
 476         goto out;
 477     }
 478     if (ferror(fp)) {
 479         error_report("error reading file");
 480         goto out;
 481     }
 482     res = 0;
 483 out:
 484     loc_pop(&loc);
 485     return res;
 486 }