qemu-config.c

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