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             .name = "pretty",
 288             .type = QEMU_OPT_BOOL,
 289         },
 290         { /* end of list */ }
 291     },
 292 };
 293
 294 #ifdef CONFIG_SIMPLE_TRACE
 295 static QemuOptsList qemu_trace_opts = {
 296     .name = "trace",
 297     .implied_opt_name = "trace",
 298     .head = QTAILQ_HEAD_INITIALIZER(qemu_trace_opts.head),
 299     .desc = {
 300         {
 301             .name = "file",
 302             .type = QEMU_OPT_STRING,
 303         },
 304         { /* end if list */ }
 305     },
 306 };
 307 #endif
 308
 309 static QemuOptsList qemu_cpudef_opts = {
 310     .name = "cpudef",
 311     .head = QTAILQ_HEAD_INITIALIZER(qemu_cpudef_opts.head),
 312     .desc = {
 313         {
 314             .name = "name",
 315             .type = QEMU_OPT_STRING,
 316         },{
 317             .name = "level",
 318             .type = QEMU_OPT_NUMBER,
 319         },{
 320             .name = "vendor",
 321             .type = QEMU_OPT_STRING,
 322         },{
 323             .name = "family",
 324             .type = QEMU_OPT_NUMBER,
 325         },{
 326             .name = "model",
 327             .type = QEMU_OPT_NUMBER,
 328         },{
 329             .name = "stepping",
 330             .type = QEMU_OPT_NUMBER,
 331         },{
 332             .name = "feature_edx",      /* cpuid 0000_0001.edx */
 333             .type = QEMU_OPT_STRING,
 334         },{
 335             .name = "feature_ecx",      /* cpuid 0000_0001.ecx */
 336             .type = QEMU_OPT_STRING,
 337         },{
 338             .name = "extfeature_edx",   /* cpuid 8000_0001.edx */
 339             .type = QEMU_OPT_STRING,
 340         },{
 341             .name = "extfeature_ecx",   /* cpuid 8000_0001.ecx */
 342             .type = QEMU_OPT_STRING,
 343         },{
 344             .name = "xlevel",
 345             .type = QEMU_OPT_NUMBER,
 346         },{
 347             .name = "model_id",
 348             .type = QEMU_OPT_STRING,
 349         },{
 350             .name = "vendor_override",
 351             .type = QEMU_OPT_NUMBER,
 352         },
 353         { /* end of list */ }
 354     },
 355 };
 356
 357 static QemuOptsList *vm_config_groups[32] = {
 358     &qemu_drive_opts,
 359     &qemu_chardev_opts,
 360     &qemu_device_opts,
 361     &qemu_netdev_opts,
 362     &qemu_net_opts,
 363     &qemu_rtc_opts,
 364     &qemu_global_opts,
 365     &qemu_mon_opts,
 366     &qemu_cpudef_opts,
 367 #ifdef CONFIG_SIMPLE_TRACE
 368     &qemu_trace_opts,
 369 #endif
 370     NULL,
 371 };
 372
 373 static QemuOptsList *find_list(QemuOptsList **lists, const char *group)
 374 {
 375     int i;
 376
 377     for (i = 0; lists[i] != NULL; i++) {
 378         if (strcmp(lists[i]->name, group) == 0)
 379             break;
 380     }
 381     if (lists[i] == NULL) {
 382         error_report("there is no option group \"%s\"", group);
 383     }
 384     return lists[i];
 385 }
 386
 387 QemuOptsList *qemu_find_opts(const char *group)
 388 {
 389     return find_list(vm_config_groups, group);
 390 }
 391
 392 void qemu_add_opts(QemuOptsList *list)
 393 {
 394     int entries, i;
 395
 396     entries = ARRAY_SIZE(vm_config_groups);
 397     entries--; /* keep list NULL terminated */
 398     for (i = 0; i < entries; i++) {
 399         if (vm_config_groups[i] == NULL) {
 400             vm_config_groups[i] = list;
 401             return;
 402         }
 403     }
 404     fprintf(stderr, "ran out of space in vm_config_groups");
 405     abort();
 406 }
 407
 408 int qemu_set_option(const char *str)
 409 {
 410     char group[64], id[64], arg[64];
 411     QemuOptsList *list;
 412     QemuOpts *opts;
 413     int rc, offset;
 414
 415     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 416     if (rc < 3 || str[offset] != '=') {
 417         error_report("can't parse: \"%s\"", str);
 418         return -1;
 419     }
 420
 421     list = qemu_find_opts(group);
 422     if (list == NULL) {
 423         return -1;
 424     }
 425
 426     opts = qemu_opts_find(list, id);
 427     if (!opts) {
 428         error_report("there is no %s \"%s\" defined",
 429                      list->name, id);
 430         return -1;
 431     }
 432
 433     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 434         return -1;
 435     }
 436     return 0;
 437 }
 438
 439 int qemu_global_option(const char *str)
 440 {
 441     char driver[64], property[64];
 442     QemuOpts *opts;
 443     int rc, offset;
 444
 445     rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
 446     if (rc < 2 || str[offset] != '=') {
 447         error_report("can't parse: \"%s\"", str);
 448         return -1;
 449     }
 450
 451     opts = qemu_opts_create(&qemu_global_opts, NULL, 0);
 452     qemu_opt_set(opts, "driver", driver);
 453     qemu_opt_set(opts, "property", property);
 454     qemu_opt_set(opts, "value", str+offset+1);
 455     return 0;
 456 }
 457
 458 struct ConfigWriteData {
 459     QemuOptsList *list;
 460     FILE *fp;
 461 };
 462
 463 static int config_write_opt(const char *name, const char *value, void *opaque)
 464 {
 465     struct ConfigWriteData *data = opaque;
 466
 467     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 468     return 0;
 469 }
 470
 471 static int config_write_opts(QemuOpts *opts, void *opaque)
 472 {
 473     struct ConfigWriteData *data = opaque;
 474     const char *id = qemu_opts_id(opts);
 475
 476     if (id) {
 477         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 478     } else {
 479         fprintf(data->fp, "[%s]\n", data->list->name);
 480     }
 481     qemu_opt_foreach(opts, config_write_opt, data, 0);
 482     fprintf(data->fp, "\n");
 483     return 0;
 484 }
 485
 486 void qemu_config_write(FILE *fp)
 487 {
 488     struct ConfigWriteData data = { .fp = fp };
 489     QemuOptsList **lists = vm_config_groups;
 490     int i;
 491
 492     fprintf(fp, "# qemu config file\n\n");
 493     for (i = 0; lists[i] != NULL; i++) {
 494         data.list = lists[i];
 495         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 496     }
 497 }
 498
 499 int qemu_config_parse(FILE *fp, QemuOptsList **lists, const char *fname)
 500 {
 501     char line[1024], group[64], id[64], arg[64], value[1024];
 502     Location loc;
 503     QemuOptsList *list = NULL;
 504     QemuOpts *opts = NULL;
 505     int res = -1, lno = 0;
 506
 507     loc_push_none(&loc);
 508     while (fgets(line, sizeof(line), fp) != NULL) {
 509         loc_set_file(fname, ++lno);
 510         if (line[0] == '\n') {
 511             /* skip empty lines */
 512             continue;
 513         }
 514         if (line[0] == '#') {
 515             /* comment */
 516             continue;
 517         }
 518         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 519             /* group with id */
 520             list = find_list(lists, group);
 521             if (list == NULL)
 522                 goto out;
 523             opts = qemu_opts_create(list, id, 1);
 524             continue;
 525         }
 526         if (sscanf(line, "[%63[^]]]", group) == 1) {
 527             /* group without id */
 528             list = find_list(lists, group);
 529             if (list == NULL)
 530                 goto out;
 531             opts = qemu_opts_create(list, NULL, 0);
 532             continue;
 533         }
 534         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 535             /* arg = value */
 536             if (opts == NULL) {
 537                 error_report("no group defined");
 538                 goto out;
 539             }
 540             if (qemu_opt_set(opts, arg, value) != 0) {
 541                 goto out;
 542             }
 543             continue;
 544         }
 545         error_report("parse error");
 546         goto out;
 547     }
 548     if (ferror(fp)) {
 549         error_report("error reading file");
 550         goto out;
 551     }
 552     res = 0;
 553 out:
 554     loc_pop(&loc);
 555     return res;
 556 }
 557
 558 int qemu_read_config_file(const char *filename)
 559 {
 560     FILE *f = fopen(filename, "r");
 561     int ret;
 562
 563     if (f == NULL) {
 564         return -errno;
 565     }
 566
 567     ret = qemu_config_parse(f, vm_config_groups, filename);
 568     fclose(f);
 569
 570     if (ret == 0) {
 571         return 0;
 572     } else {
 573         return -EINVAL;
 574     }
 575 }