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 static 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 of list */ }
  84     },
  85 };
  86
  87 static 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 of list */ }
 151     },
 152 };
 153
 154 QemuOptsList qemu_fsdev_opts = {
 155     .name = "fsdev",
 156     .implied_opt_name = "fstype",
 157     .head = QTAILQ_HEAD_INITIALIZER(qemu_fsdev_opts.head),
 158     .desc = {
 159         {
 160             .name = "fstype",
 161             .type = QEMU_OPT_STRING,
 162         }, {
 163             .name = "path",
 164             .type = QEMU_OPT_STRING,
 165         }, {
 166             .name = "security_model",
 167             .type = QEMU_OPT_STRING,
 168         },
 169         { /*End of list */ }
 170     },
 171 };
 172
 173 QemuOptsList qemu_virtfs_opts = {
 174     .name = "virtfs",
 175     .implied_opt_name = "fstype",
 176     .head = QTAILQ_HEAD_INITIALIZER(qemu_virtfs_opts.head),
 177     .desc = {
 178         {
 179             .name = "fstype",
 180             .type = QEMU_OPT_STRING,
 181         }, {
 182             .name = "path",
 183             .type = QEMU_OPT_STRING,
 184         }, {
 185             .name = "mount_tag",
 186             .type = QEMU_OPT_STRING,
 187         }, {
 188             .name = "security_model",
 189             .type = QEMU_OPT_STRING,
 190         },
 191
 192         { /*End of list */ }
 193     },
 194 };
 195
 196 static QemuOptsList qemu_device_opts = {
 197     .name = "device",
 198     .implied_opt_name = "driver",
 199     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 200     .desc = {
 201         /*
 202          * no elements => accept any
 203          * sanity checking will happen later
 204          * when setting device properties
 205          */
 206         { /* end of list */ }
 207     },
 208 };
 209
 210 static QemuOptsList qemu_netdev_opts = {
 211     .name = "netdev",
 212     .implied_opt_name = "type",
 213     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 214     .desc = {
 215         /*
 216          * no elements => accept any params
 217          * validation will happen later
 218          */
 219         { /* end of list */ }
 220     },
 221 };
 222
 223 static QemuOptsList qemu_net_opts = {
 224     .name = "net",
 225     .implied_opt_name = "type",
 226     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 227     .desc = {
 228         /*
 229          * no elements => accept any params
 230          * validation will happen later
 231          */
 232         { /* end of list */ }
 233     },
 234 };
 235
 236 static QemuOptsList qemu_rtc_opts = {
 237     .name = "rtc",
 238     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 239     .desc = {
 240         {
 241             .name = "base",
 242             .type = QEMU_OPT_STRING,
 243         },{
 244             .name = "clock",
 245             .type = QEMU_OPT_STRING,
 246         },{
 247             .name = "driftfix",
 248             .type = QEMU_OPT_STRING,
 249         },
 250         { /* end of list */ }
 251     },
 252 };
 253
 254 static QemuOptsList qemu_global_opts = {
 255     .name = "global",
 256     .head = QTAILQ_HEAD_INITIALIZER(qemu_global_opts.head),
 257     .desc = {
 258         {
 259             .name = "driver",
 260             .type = QEMU_OPT_STRING,
 261         },{
 262             .name = "property",
 263             .type = QEMU_OPT_STRING,
 264         },{
 265             .name = "value",
 266             .type = QEMU_OPT_STRING,
 267         },
 268         { /* end of list */ }
 269     },
 270 };
 271
 272 static QemuOptsList qemu_mon_opts = {
 273     .name = "mon",
 274     .implied_opt_name = "chardev",
 275     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
 276     .desc = {
 277         {
 278             .name = "mode",
 279             .type = QEMU_OPT_STRING,
 280         },{
 281             .name = "chardev",
 282             .type = QEMU_OPT_STRING,
 283         },{
 284             .name = "default",
 285             .type = QEMU_OPT_BOOL,
 286         },
 287         { /* end of list */ }
 288     },
 289 };
 290
 291 static QemuOptsList qemu_cpudef_opts = {
 292     .name = "cpudef",
 293     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 294     .desc = {
 295         {
 296             .name = "name",
 297             .type = QEMU_OPT_STRING,
 298         },{
 299             .name = "level",
 300             .type = QEMU_OPT_NUMBER,
 301         },{
 302             .name = "vendor",
 303             .type = QEMU_OPT_STRING,
 304         },{
 305             .name = "family",
 306             .type = QEMU_OPT_NUMBER,
 307         },{
 308             .name = "model",
 309             .type = QEMU_OPT_NUMBER,
 310         },{
 311             .name = "stepping",
 312             .type = QEMU_OPT_NUMBER,
 313         },{
 314             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 315             .type = QEMU_OPT_STRING,
 316         },{
 317             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 318             .type = QEMU_OPT_STRING,
 319         },{
 320             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 321             .type = QEMU_OPT_STRING,
 322         },{
 323             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 324             .type = QEMU_OPT_STRING,
 325         },{
 326             .name = "xlevel",
 327             .type = QEMU_OPT_NUMBER,
 328         },{
 329             .name = "model_id",
 330             .type = QEMU_OPT_STRING,
 331         },{
 332             .name = "vendor_override",
 333             .type = QEMU_OPT_NUMBER,
 334         },
 335         { /* end of list */ }
 336     },
 337 };
 338
 339 static QemuOptsList *vm_config_groups[32] = {
 340     &qemu_drive_opts,
 341     &qemu_chardev_opts,
 342     &qemu_device_opts,
 343     &qemu_netdev_opts,
 344     &qemu_net_opts,
 345     &qemu_rtc_opts,
 346     &qemu_global_opts,
 347     &qemu_mon_opts,
 348     &qemu_cpudef_opts,
 349     NULL,
 350 };
 351
 352 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 353 {
 354     int i;
 355
 356     for (i = 0; lists[i] != NULL; i++) {
 357         if (strcmp(lists[i]->name, group) == 0)
 358             break;
 359     }
 360     if (lists[i] == NULL) {
 361         error_report("there is no option group \"%s\"", group);
 362     }
 363     return lists[i];
 364 }
 365
 366 QemuOptsList *qemu_find_opts(const char *group)
 367 {
 368     return find_list(vm_config_groups, group);
 369 }
 370
 371 void qemu_add_opts(QemuOptsList *list)
 372 {
 373     int entries, i;
 374
 375     entries = ARRAY_SIZE(vm_config_groups);
 376     entries--; /* keep list NULL terminated */
 377     for (i = 0; i < entries; i++) {
 378         if (vm_config_groups[i] == NULL) {
 379             vm_config_groups[i] = list;
 380             return;
 381         }
 382     }
 383     fprintf(stderr, "ran out of space in vm_config_groups");
 384     abort();
 385 }
 386
 387 int qemu_set_option(const char *str)
 388 {
 389     char group[64], id[64], arg[64];
 390     QemuOptsList *list;
 391     QemuOpts *opts;
 392     int rc, offset;
 393
 394     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 395     if (rc < 3 || str[offset] != '=') {
 396         error_report("can't parse: \"%s\"", str);
 397         return -1;
 398     }
 399
 400     list = qemu_find_opts(group);
 401     if (list == NULL) {
 402         return -1;
 403     }
 404
 405     opts = qemu_opts_find(list, id);
 406     if (!opts) {
 407         error_report("there is no %s \"%s\" defined",
 408                      list->name, id);
 409         return -1;
 410     }
 411
 412     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 413         return -1;
 414     }
 415     return 0;
 416 }
 417
 418 int qemu_global_option(const char *str)
 419 {
 420     char driver[64], property[64];
 421     QemuOpts *opts;
 422     int rc, offset;
 423
 424     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 425     if (rc < 2 || str[offset] != '=') {
 426         error_report("can't parse: \"%s\"", str);
 427         return -1;
 428     }
 429
 430     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 431     qemu_opt_set(opts, "driver", driver);
 432     qemu_opt_set(opts, "property", property);
 433     qemu_opt_set(opts, "value", str+offset+1);
 434     return 0;
 435 }
 436
 437 struct ConfigWriteData {
 438     QemuOptsList *list;
 439     FILE *fp;
 440 };
 441
 442 static int config_write_opt(const char *name, const char *value, void *opaque)
 443 {
 444     struct ConfigWriteData *data = opaque;
 445
 446     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 447     return 0;
 448 }
 449
 450 static int config_write_opts(QemuOpts *opts, void *opaque)
 451 {
 452     struct ConfigWriteData *data = opaque;
 453     const char *id = qemu_opts_id(opts);
 454
 455     if (id) {
 456         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 457     } else {
 458         fprintf(data->fp, "[%s]\n", data->list->name);
 459     }
 460     qemu_opt_foreach(opts, config_write_opt, data, 0);
 461     fprintf(data->fp, "\n");
 462     return 0;
 463 }
 464
 465 void qemu_config_write(FILE *fp)
 466 {
 467     struct ConfigWriteData data = { .fp = fp };
 468     QemuOptsList **lists = vm_config_groups;
 469     int i;
 470
 471     fprintf(fp, "# qemu config file\n\n");
 472     for (i = 0; lists[i] != NULL; i++) {
 473         data.list = lists[i];
 474         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 475     }
 476 }
 477
 478 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 479 {
 480     char line[1024], group[64], id[64], arg[64], value[1024];
 481     Location loc;
 482     QemuOptsList *list = NULL;
 483     QemuOpts *opts = NULL;
 484     int res = -1, lno = 0;
 485
 486     loc_push_none(&loc);
 487     while (fgets(line, sizeof(line), fp) != NULL) {
 488         loc_set_file(fname, ++lno);
 489         if (line[0] == '\n') {
 490             /* skip empty lines */
 491             continue;
 492         }
 493         if (line[0] == '#') {
 494             /* comment */
 495             continue;
 496         }
 497         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 498             /* group with id */
 499             list = find_list(lists, group);
 500             if (list == NULL)
 501                 goto out;
 502             opts = qemu_opts_create(list, id, 1);
 503             continue;
 504         }
 505         if (sscanf(line, "[%63[^]]]", group) == 1) {
 506             /* group without id */
 507             list = find_list(lists, group);
 508             if (list == NULL)
 509                 goto out;
 510             opts = qemu_opts_create(list, NULL, 0);
 511             continue;
 512         }
 513         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 514             /* arg = value */
 515             if (opts == NULL) {
 516                 error_report("no group defined");
 517                 goto out;
 518             }
 519             if (qemu_opt_set(opts, arg, value) != 0) {
 520                 goto out;
 521             }
 522             continue;
 523         }
 524         error_report("parse error");
 525         goto out;
 526     }
 527     if (ferror(fp)) {
 528         error_report("error reading file");
 529         goto out;
 530     }
 531     res = 0;
 532 out:
 533     loc_pop(&loc);
 534     return res;
 535 }
 536
 537 int qemu_read_config_file(const char *filename)
 538 {
 539     FILE *f = fopen(filename, "r");
 540     int ret;
 541
 542     if (f == NULL) {
 543         return -errno;
 544     }
 545
 546     ret = qemu_config_parse(f, vm_config_groups, filename);
 547     fclose(f);
 548
 549     if (ret == 0) {
 550         return 0;
 551     } else {
 552         return -EINVAL;
 553     }
 554 }