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         { /* end if list */ }
  83     },
  84 };
  85
  86 QemuOptsList qemu_chardev_opts = {
  87     .name = "chardev",
  88     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  89     .desc = {
  90         {
  91             .name = "backend",
  92             .type = QEMU_OPT_STRING,
  93         },{
  94             .name = "path",
  95             .type = QEMU_OPT_STRING,
  96         },{
  97             .name = "host",
  98             .type = QEMU_OPT_STRING,
  99         },{
 100             .name = "port",
 101             .type = QEMU_OPT_STRING,
 102         },{
 103             .name = "localaddr",
 104             .type = QEMU_OPT_STRING,
 105         },{
 106             .name = "localport",
 107             .type = QEMU_OPT_STRING,
 108         },{
 109             .name = "to",
 110             .type = QEMU_OPT_NUMBER,
 111         },{
 112             .name = "ipv4",
 113             .type = QEMU_OPT_BOOL,
 114         },{
 115             .name = "ipv6",
 116             .type = QEMU_OPT_BOOL,
 117         },{
 118             .name = "wait",
 119             .type = QEMU_OPT_BOOL,
 120         },{
 121             .name = "server",
 122             .type = QEMU_OPT_BOOL,
 123         },{
 124             .name = "delay",
 125             .type = QEMU_OPT_BOOL,
 126         },{
 127             .name = "telnet",
 128             .type = QEMU_OPT_BOOL,
 129         },{
 130             .name = "width",
 131             .type = QEMU_OPT_NUMBER,
 132         },{
 133             .name = "height",
 134             .type = QEMU_OPT_NUMBER,
 135         },{
 136             .name = "cols",
 137             .type = QEMU_OPT_NUMBER,
 138         },{
 139             .name = "rows",
 140             .type = QEMU_OPT_NUMBER,
 141         },{
 142             .name = "mux",
 143             .type = QEMU_OPT_BOOL,
 144         },{
 145             .name = "signal",
 146             .type = QEMU_OPT_BOOL,
 147         },
 148         { /* end if list */ }
 149     },
 150 };
 151
 152 QemuOptsList qemu_device_opts = {
 153     .name = "device",
 154     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 155     .desc = {
 156         /*
 157          * no elements => accept any
 158          * sanity checking will happen later
 159          * when setting device properties
 160          */
 161         { /* end if list */ }
 162     },
 163 };
 164
 165 QemuOptsList qemu_netdev_opts = {
 166     .name = "netdev",
 167     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 168     .desc = {
 169         /*
 170          * no elements => accept any params
 171          * validation will happen later
 172          */
 173         { /* end of list */ }
 174     },
 175 };
 176
 177 QemuOptsList qemu_net_opts = {
 178     .name = "net",
 179     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 180     .desc = {
 181         /*
 182          * no elements => accept any params
 183          * validation will happen later
 184          */
 185         { /* end of list */ }
 186     },
 187 };
 188
 189 QemuOptsList qemu_rtc_opts = {
 190     .name = "rtc",
 191     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 192     .desc = {
 193         {
 194             .name = "base",
 195             .type = QEMU_OPT_STRING,
 196         },{
 197             .name = "clock",
 198             .type = QEMU_OPT_STRING,
 199 #ifdef TARGET_I386
 200         },{
 201             .name = "driftfix",
 202             .type = QEMU_OPT_STRING,
 203 #endif
 204         },
 205         { /* end if list */ }
 206     },
 207 };
 208
 209 QemuOptsList qemu_global_opts = {
 210     .name = "global",
 211     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 212     .desc = {
 213         {
 214             .name = "driver",
 215             .type = QEMU_OPT_STRING,
 216         },{
 217             .name = "property",
 218             .type = QEMU_OPT_STRING,
 219         },{
 220             .name = "value",
 221             .type = QEMU_OPT_STRING,
 222         },
 223         { /* end if list */ }
 224     },
 225 };
 226
 227 QemuOptsList qemu_mon_opts = {
 228     .name = "mon",
 229     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 230     .desc = {
 231         {
 232             .name = "mode",
 233             .type = QEMU_OPT_STRING,
 234         },{
 235             .name = "chardev",
 236             .type = QEMU_OPT_STRING,
 237         },{
 238             .name = "default",
 239             .type = QEMU_OPT_BOOL,
 240         },
 241         { /* end if list */ }
 242     },
 243 };
 244
 245 static QemuOptsList *lists[] = {
 246     &qemu_drive_opts,
 247     &qemu_chardev_opts,
 248     &qemu_device_opts,
 249     &qemu_netdev_opts,
 250     &qemu_net_opts,
 251     &qemu_rtc_opts,
 252     &qemu_global_opts,
 253     &qemu_mon_opts,
 254     NULL,
 255 };
 256
 257 static QemuOptsList *find_list(const char *group)
 258 {
 259     int i;
 260
 261     for (i = 0; lists[i] != NULL; i++) {
 262         if (strcmp(lists[i]->name, group) == 0)
 263             break;
 264     }
 265     if (lists[i] == NULL) {
 266         qemu_error("there is no option group \"%s\"\n", group);
 267     }
 268     return lists[i];
 269 }
 270
 271 int qemu_set_option(const char *str)
 272 {
 273     char group[64], id[64], arg[64];
 274     QemuOptsList *list;
 275     QemuOpts *opts;
 276     int rc, offset;
 277
 278     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 279     if (rc < 3 || str[offset] != '=') {
 280         qemu_error("can't parse: \"%s\"\n", str);
 281         return -1;
 282     }
 283
 284     list = find_list(group);
 285     if (list == NULL) {
 286         return -1;
 287     }
 288
 289     opts = qemu_opts_find(list, id);
 290     if (!opts) {
 291         qemu_error("there is no %s \"%s\" defined\n",
 292                    list->name, id);
 293         return -1;
 294     }
 295
 296     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 297         return -1;
 298     }
 299     return 0;
 300 }
 301
 302 int qemu_global_option(const char *str)
 303 {
 304     char driver[64], property[64];
 305     QemuOpts *opts;
 306     int rc, offset;
 307
 308     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 309     if (rc < 2 || str[offset] != '=') {
 310         qemu_error("can't parse: \"%s\"\n", str);
 311         return -1;
 312     }
 313
 314     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 315     qemu_opt_set(opts, "driver", driver);
 316     qemu_opt_set(opts, "property", property);
 317     qemu_opt_set(opts, "value", str+offset+1);
 318     return 0;
 319 }
 320
 321 static int qemu_add_one_global(QemuOpts *opts, void *opaque)
 322 {
 323     GlobalProperty *g;
 324
 325     g = qemu_mallocz(sizeof(*g));
 326     g->driver   = qemu_opt_get(opts, "driver");
 327     g->property = qemu_opt_get(opts, "property");
 328     g->value    = qemu_opt_get(opts, "value");
 329     qdev_prop_register_global(g);
 330     return 0;
 331 }
 332
 333 void qemu_add_globals(void)
 334 {
 335     qemu_opts_foreach(&qemu_global_opts, qemu_add_one_global, NULL, 0);
 336 }
 337
 338 struct ConfigWriteData {
 339     QemuOptsList *list;
 340     FILE *fp;
 341 };
 342
 343 static int config_write_opt(const char *name, const char *value, void *opaque)
 344 {
 345     struct ConfigWriteData *data = opaque;
 346
 347     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 348     return 0;
 349 }
 350
 351 static int config_write_opts(QemuOpts *opts, void *opaque)
 352 {
 353     struct ConfigWriteData *data = opaque;
 354     const char *id = qemu_opts_id(opts);
 355
 356     if (id) {
 357         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 358     } else {
 359         fprintf(data->fp, "[%s]\n", data->list->name);
 360     }
 361     qemu_opt_foreach(opts, config_write_opt, data, 0);
 362     fprintf(data->fp, "\n");
 363     return 0;
 364 }
 365
 366 void qemu_config_write(FILE *fp)
 367 {
 368     struct ConfigWriteData data = { .fp = fp };
 369     int i;
 370
 371     fprintf(fp, "# qemu config file\n\n");
 372     for (i = 0; lists[i] != NULL; i++) {
 373         data.list = lists[i];
 374         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 375     }
 376 }
 377
 378 int qemu_config_parse(FILE *fp)
 379 {
 380     char line[1024], group[64], id[64], arg[64], value[1024];
 381     QemuOptsList *list = NULL;
 382     QemuOpts *opts = NULL;
 383
 384     while (fgets(line, sizeof(line), fp) != NULL) {
 385         if (line[0] == '\n') {
 386             /* skip empty lines */
 387             continue;
 388         }
 389         if (line[0] == '#') {
 390             /* comment */
 391             continue;
 392         }
 393         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 394             /* group with id */
 395             list = find_list(group);
 396             if (list == NULL)
 397                 return -1;
 398             opts = qemu_opts_create(list, id, 1);
 399             continue;
 400         }
 401         if (sscanf(line, "[%63[^]]]", group) == 1) {
 402             /* group without id */
 403             list = find_list(group);
 404             if (list == NULL)
 405                 return -1;
 406             opts = qemu_opts_create(list, NULL, 0);
 407             continue;
 408         }
 409         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 410             /* arg = value */
 411             if (opts == NULL) {
 412                 fprintf(stderr, "no group defined\n");
 413                 return -1;
 414             }
 415             if (qemu_opt_set(opts, arg, value) != 0) {
 416                 fprintf(stderr, "failed to set \"%s\" for %s\n",
 417                         arg, group);
 418                 return -1;
 419             }
 420             continue;
 421         }
 422         fprintf(stderr, "parse error: %s\n", line);
 423         return -1;
 424     }
 425     return 0;
 426 }