qemu-config.c

   1 #include "qemu-common.h"
   2 #include "qemu-option.h"
   3 #include "qemu-config.h"
   4 #include "sysemu.h"
   5 #include "hw/qdev.h"
   6
   7 QemuOptsList qemu_drive_opts = {
   8     .name = "drive",
   9     .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
  10     .desc = {
  11         {
  12             .name = "bus",
  13             .type = QEMU_OPT_NUMBER,
  14             .help = "bus number",
  15         },{
  16             .name = "unit",
  17             .type = QEMU_OPT_NUMBER,
  18             .help = "unit number (i.e. lun for scsi)",
  19         },{
  20             .name = "if",
  21             .type = QEMU_OPT_STRING,
  22             .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
  23         },{
  24             .name = "index",
  25             .type = QEMU_OPT_NUMBER,
  26         },{
  27             .name = "cyls",
  28             .type = QEMU_OPT_NUMBER,
  29             .help = "number of cylinders (ide disk geometry)",
  30         },{
  31             .name = "heads",
  32             .type = QEMU_OPT_NUMBER,
  33             .help = "number of heads (ide disk geometry)",
  34         },{
  35             .name = "secs",
  36             .type = QEMU_OPT_NUMBER,
  37             .help = "number of sectors (ide disk geometry)",
  38         },{
  39             .name = "trans",
  40             .type = QEMU_OPT_STRING,
  41             .help = "chs translation (auto, lba. none)",
  42         },{
  43             .name = "media",
  44             .type = QEMU_OPT_STRING,
  45             .help = "media type (disk, cdrom)",
  46         },{
  47             .name = "snapshot",
  48             .type = QEMU_OPT_BOOL,
  49         },{
  50             .name = "file",
  51             .type = QEMU_OPT_STRING,
  52             .help = "disk image",
  53         },{
  54             .name = "cache",
  55             .type = QEMU_OPT_STRING,
  56             .help = "host cache usage (none, writeback, writethrough)",
  57         },{
  58             .name = "aio",
  59             .type = QEMU_OPT_STRING,
  60             .help = "host AIO implementation (threads, native)",
  61         },{
  62             .name = "format",
  63             .type = QEMU_OPT_STRING,
  64             .help = "disk format (raw, qcow2, ...)",
  65         },{
  66             .name = "serial",
  67             .type = QEMU_OPT_STRING,
  68         },{
  69             .name = "rerror",
  70             .type = QEMU_OPT_STRING,
  71         },{
  72             .name = "werror",
  73             .type = QEMU_OPT_STRING,
  74         },{
  75             .name = "addr",
  76             .type = QEMU_OPT_STRING,
  77             .help = "pci address (virtio only)",
  78         },{
  79             .name = "readonly",
  80             .type = QEMU_OPT_BOOL,
  81         },{
  82             .name = "boot",
  83             .type = QEMU_OPT_BOOL,
  84             .help = "make this a boot drive",
  85         },
  86         { /* end if list */ }
  87     },
  88 };
  89
  90 QemuOptsList qemu_chardev_opts = {
  91     .name = "chardev",
  92     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  93     .desc = {
  94         {
  95             .name = "backend",
  96             .type = QEMU_OPT_STRING,
  97         },{
  98             .name = "path",
  99             .type = QEMU_OPT_STRING,
 100         },{
 101             .name = "host",
 102             .type = QEMU_OPT_STRING,
 103         },{
 104             .name = "port",
 105             .type = QEMU_OPT_STRING,
 106         },{
 107             .name = "localaddr",
 108             .type = QEMU_OPT_STRING,
 109         },{
 110             .name = "localport",
 111             .type = QEMU_OPT_STRING,
 112         },{
 113             .name = "to",
 114             .type = QEMU_OPT_NUMBER,
 115         },{
 116             .name = "ipv4",
 117             .type = QEMU_OPT_BOOL,
 118         },{
 119             .name = "ipv6",
 120             .type = QEMU_OPT_BOOL,
 121         },{
 122             .name = "wait",
 123             .type = QEMU_OPT_BOOL,
 124         },{
 125             .name = "server",
 126             .type = QEMU_OPT_BOOL,
 127         },{
 128             .name = "delay",
 129             .type = QEMU_OPT_BOOL,
 130         },{
 131             .name = "telnet",
 132             .type = QEMU_OPT_BOOL,
 133         },{
 134             .name = "width",
 135             .type = QEMU_OPT_NUMBER,
 136         },{
 137             .name = "height",
 138             .type = QEMU_OPT_NUMBER,
 139         },{
 140             .name = "cols",
 141             .type = QEMU_OPT_NUMBER,
 142         },{
 143             .name = "rows",
 144             .type = QEMU_OPT_NUMBER,
 145         },{
 146             .name = "mux",
 147             .type = QEMU_OPT_BOOL,
 148         },{
 149             .name = "signal",
 150             .type = QEMU_OPT_BOOL,
 151         },
 152         { /* end if list */ }
 153     },
 154 };
 155
 156 QemuOptsList qemu_device_opts = {
 157     .name = "device",
 158     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 159     .desc = {
 160         /*
 161          * no elements => accept any
 162          * sanity checking will happen later
 163          * when setting device properties
 164          */
 165         { /* end if list */ }
 166     },
 167 };
 168
 169 QemuOptsList qemu_netdev_opts = {
 170     .name = "netdev",
 171     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 172     .desc = {
 173         /*
 174          * no elements => accept any params
 175          * validation will happen later
 176          */
 177         { /* end of list */ }
 178     },
 179 };
 180
 181 QemuOptsList qemu_net_opts = {
 182     .name = "net",
 183     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 184     .desc = {
 185         /*
 186          * no elements => accept any params
 187          * validation will happen later
 188          */
 189         { /* end of list */ }
 190     },
 191 };
 192
 193 QemuOptsList qemu_rtc_opts = {
 194     .name = "rtc",
 195     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 196     .desc = {
 197         {
 198             .name = "base",
 199             .type = QEMU_OPT_STRING,
 200         },{
 201             .name = "clock",
 202             .type = QEMU_OPT_STRING,
 203 #ifdef TARGET_I386
 204         },{
 205             .name = "driftfix",
 206             .type = QEMU_OPT_STRING,
 207 #endif
 208         },
 209         { /* end if list */ }
 210     },
 211 };
 212
 213 QemuOptsList qemu_global_opts = {
 214     .name = "global",
 215     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 216     .desc = {
 217         {
 218             .name = "driver",
 219             .type = QEMU_OPT_STRING,
 220         },{
 221             .name = "property",
 222             .type = QEMU_OPT_STRING,
 223         },{
 224             .name = "value",
 225             .type = QEMU_OPT_STRING,
 226         },
 227         { /* end if list */ }
 228     },
 229 };
 230
 231 QemuOptsList qemu_mon_opts = {
 232     .name = "mon",
 233     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 234     .desc = {
 235         {
 236             .name = "mode",
 237             .type = QEMU_OPT_STRING,
 238         },{
 239             .name = "chardev",
 240             .type = QEMU_OPT_STRING,
 241         },{
 242             .name = "default",
 243             .type = QEMU_OPT_BOOL,
 244         },
 245         { /* end if list */ }
 246     },
 247 };
 248
 249 static QemuOptsList *lists[] = {
 250     &qemu_drive_opts,
 251     &qemu_chardev_opts,
 252     &qemu_device_opts,
 253     &qemu_netdev_opts,
 254     &qemu_net_opts,
 255     &qemu_rtc_opts,
 256     &qemu_global_opts,
 257     &qemu_mon_opts,
 258     NULL,
 259 };
 260
 261 static QemuOptsList *find_list(const char *group)
 262 {
 263     int i;
 264
 265     for (i = 0; lists[i] != NULL; i++) {
 266         if (strcmp(lists[i]->name, group) == 0)
 267             break;
 268     }
 269     if (lists[i] == NULL) {
 270         qemu_error("there is no option group \"%s\"\n", group);
 271     }
 272     return lists[i];
 273 }
 274
 275 int qemu_set_option(const char *str)
 276 {
 277     char group[64], id[64], arg[64];
 278     QemuOptsList *list;
 279     QemuOpts *opts;
 280     int rc, offset;
 281
 282     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 283     if (rc < 3 || str[offset] != '=') {
 284         qemu_error("can't parse: \"%s\"\n", str);
 285         return -1;
 286     }
 287
 288     list = find_list(group);
 289     if (list == NULL) {
 290         return -1;
 291     }
 292
 293     opts = qemu_opts_find(list, id);
 294     if (!opts) {
 295         qemu_error("there is no %s \"%s\" defined\n",
 296                    list->name, id);
 297         return -1;
 298     }
 299
 300     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 301         return -1;
 302     }
 303     return 0;
 304 }
 305
 306 int qemu_global_option(const char *str)
 307 {
 308     char driver[64], property[64];
 309     QemuOpts *opts;
 310     int rc, offset;
 311
 312     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 313     if (rc < 2 || str[offset] != '=') {
 314         qemu_error("can't parse: \"%s\"\n", str);
 315         return -1;
 316     }
 317
 318     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 319     qemu_opt_set(opts, "driver", driver);
 320     qemu_opt_set(opts, "property", property);
 321     qemu_opt_set(opts, "value", str+offset+1);
 322     return 0;
 323 }
 324
 325 static int qemu_add_one_global(QemuOpts *opts, void *opaque)
 326 {
 327     GlobalProperty *g;
 328
 329     g = qemu_mallocz(sizeof(*g));
 330     g->driver   = qemu_opt_get(opts, "driver");
 331     g->property = qemu_opt_get(opts, "property");
 332     g->value    = qemu_opt_get(opts, "value");
 333     qdev_prop_register_global(g);
 334     return 0;
 335 }
 336
 337 void qemu_add_globals(void)
 338 {
 339     qemu_opts_foreach(&qemu_global_opts, qemu_add_one_global, NULL, 0);
 340 }
 341
 342 struct ConfigWriteData {
 343     QemuOptsList *list;
 344     FILE *fp;
 345 };
 346
 347 static int config_write_opt(const char *name, const char *value, void *opaque)
 348 {
 349     struct ConfigWriteData *data = opaque;
 350
 351     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 352     return 0;
 353 }
 354
 355 static int config_write_opts(QemuOpts *opts, void *opaque)
 356 {
 357     struct ConfigWriteData *data = opaque;
 358     const char *id = qemu_opts_id(opts);
 359
 360     if (id) {
 361         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 362     } else {
 363         fprintf(data->fp, "[%s]\n", data->list->name);
 364     }
 365     qemu_opt_foreach(opts, config_write_opt, data, 0);
 366     fprintf(data->fp, "\n");
 367     return 0;
 368 }
 369
 370 void qemu_config_write(FILE *fp)
 371 {
 372     struct ConfigWriteData data = { .fp = fp };
 373     int i;
 374
 375     fprintf(fp, "# qemu config file\n\n");
 376     for (i = 0; lists[i] != NULL; i++) {
 377         data.list = lists[i];
 378         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 379     }
 380 }
 381
 382 int qemu_config_parse(FILE *fp)
 383 {
 384     char line[1024], group[64], id[64], arg[64], value[1024];
 385     QemuOptsList *list = NULL;
 386     QemuOpts *opts = NULL;
 387
 388     while (fgets(line, sizeof(line), fp) != NULL) {
 389         if (line[0] == '\n') {
 390             /* skip empty lines */
 391             continue;
 392         }
 393         if (line[0] == '#') {
 394             /* comment */
 395             continue;
 396         }
 397         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 398             /* group with id */
 399             list = find_list(group);
 400             if (list == NULL)
 401                 return -1;
 402             opts = qemu_opts_create(list, id, 1);
 403             continue;
 404         }
 405         if (sscanf(line, "[%63[^]]]", group) == 1) {
 406             /* group without id */
 407             list = find_list(group);
 408             if (list == NULL)
 409                 return -1;
 410             opts = qemu_opts_create(list, NULL, 0);
 411             continue;
 412         }
 413         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 414             /* arg = value */
 415             if (opts == NULL) {
 416                 fprintf(stderr, "no group defined\n");
 417                 return -1;
 418             }
 419             if (qemu_opt_set(opts, arg, value) != 0) {
 420                 fprintf(stderr, "failed to set \"%s\" for %s\n",
 421                         arg, group);
 422                 return -1;
 423             }
 424             continue;
 425         }
 426         fprintf(stderr, "parse error: %s\n", line);
 427         return -1;
 428     }
 429     return 0;
 430 }