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 = "werror",
  69             .type = QEMU_OPT_STRING,
  70         },{
  71             .name = "addr",
  72             .type = QEMU_OPT_STRING,
  73             .help = "pci address (virtio only)",
  74         },{
  75             .name = "readonly",
  76             .type = QEMU_OPT_BOOL,
  77         },
  78         { /* end if list */ }
  79     },
  80 };
  81
  82 QemuOptsList qemu_chardev_opts = {
  83     .name = "chardev",
  84     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  85     .desc = {
  86         {
  87             .name = "backend",
  88             .type = QEMU_OPT_STRING,
  89         },{
  90             .name = "path",
  91             .type = QEMU_OPT_STRING,
  92         },{
  93             .name = "host",
  94             .type = QEMU_OPT_STRING,
  95         },{
  96             .name = "port",
  97             .type = QEMU_OPT_STRING,
  98         },{
  99             .name = "localaddr",
 100             .type = QEMU_OPT_STRING,
 101         },{
 102             .name = "localport",
 103             .type = QEMU_OPT_STRING,
 104         },{
 105             .name = "to",
 106             .type = QEMU_OPT_NUMBER,
 107         },{
 108             .name = "ipv4",
 109             .type = QEMU_OPT_BOOL,
 110         },{
 111             .name = "ipv6",
 112             .type = QEMU_OPT_BOOL,
 113         },{
 114             .name = "wait",
 115             .type = QEMU_OPT_BOOL,
 116         },{
 117             .name = "server",
 118             .type = QEMU_OPT_BOOL,
 119         },{
 120             .name = "delay",
 121             .type = QEMU_OPT_BOOL,
 122         },{
 123             .name = "telnet",
 124             .type = QEMU_OPT_BOOL,
 125         },{
 126             .name = "width",
 127             .type = QEMU_OPT_NUMBER,
 128         },{
 129             .name = "height",
 130             .type = QEMU_OPT_NUMBER,
 131         },{
 132             .name = "cols",
 133             .type = QEMU_OPT_NUMBER,
 134         },{
 135             .name = "rows",
 136             .type = QEMU_OPT_NUMBER,
 137         },{
 138             .name = "mux",
 139             .type = QEMU_OPT_BOOL,
 140         },{
 141             .name = "signal",
 142             .type = QEMU_OPT_BOOL,
 143         },
 144         { /* end if list */ }
 145     },
 146 };
 147
 148 QemuOptsList qemu_device_opts = {
 149     .name = "device",
 150     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
 151     .desc = {
 152         /*
 153          * no elements => accept any
 154          * sanity checking will happen later
 155          * when setting device properties
 156          */
 157         { /* end if list */ }
 158     },
 159 };
 160
 161 QemuOptsList qemu_netdev_opts = {
 162     .name = "netdev",
 163     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
 164     .desc = {
 165         /*
 166          * no elements => accept any params
 167          * validation will happen later
 168          */
 169         { /* end of list */ }
 170     },
 171 };
 172
 173 QemuOptsList qemu_net_opts = {
 174     .name = "net",
 175     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
 176     .desc = {
 177         /*
 178          * no elements => accept any params
 179          * validation will happen later
 180          */
 181         { /* end of list */ }
 182     },
 183 };
 184
 185 QemuOptsList qemu_rtc_opts = {
 186     .name = "rtc",
 187     .head = QTAILQ_HEAD_INITIALIZER(qemu_rtc_opts.head),
 188     .desc = {
 189         {
 190             .name = "base",
 191             .type = QEMU_OPT_STRING,
 192         },{
 193             .name = "clock",
 194             .type = QEMU_OPT_STRING,
 195 #ifdef TARGET_I386
 196         },{
 197             .name = "driftfix",
 198             .type = QEMU_OPT_STRING,
 199 #endif
 200         },
 201         { /* end if list */ }
 202     },
 203 };
 204
 205 static QemuOptsList *lists[] = {
 206     &qemu_drive_opts,
 207     &qemu_chardev_opts,
 208     &qemu_device_opts,
 209     &qemu_netdev_opts,
 210     &qemu_net_opts,
 211     &qemu_rtc_opts,
 212     NULL,
 213 };
 214
 215 static QemuOptsList *find_list(const char *group)
 216 {
 217     int i;
 218
 219     for (i = 0; lists[i] != NULL; i++) {
 220         if (strcmp(lists[i]->name, group) == 0)
 221             break;
 222     }
 223     if (lists[i] == NULL) {
 224         qemu_error("there is no option group \"%s\"\n", group);
 225     }
 226     return lists[i];
 227 }
 228
 229 int qemu_set_option(const char *str)
 230 {
 231     char group[64], id[64], arg[64];
 232     QemuOptsList *list;
 233     QemuOpts *opts;
 234     int rc, offset;
 235
 236     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 237     if (rc < 3 || str[offset] != '=') {
 238         qemu_error("can't parse: \"%s\"\n", str);
 239         return -1;
 240     }
 241
 242     list = find_list(group);
 243     if (list == NULL) {
 244         return -1;
 245     }
 246
 247     opts = qemu_opts_find(list, id);
 248     if (!opts) {
 249         qemu_error("there is no %s \"%s\" defined\n",
 250                    list->name, id);
 251         return -1;
 252     }
 253
 254     if (qemu_opt_set(opts, arg, str+offset+1) == -1) {
 255         return -1;
 256     }
 257     return 0;
 258 }
 259
 260 struct ConfigWriteData {
 261     QemuOptsList *list;
 262     FILE *fp;
 263 };
 264
 265 static int config_write_opt(const char *name, const char *value, void *opaque)
 266 {
 267     struct ConfigWriteData *data = opaque;
 268
 269     fprintf(data->fp, "  %s = \"%s\"\n", name, value);
 270     return 0;
 271 }
 272
 273 static int config_write_opts(QemuOpts *opts, void *opaque)
 274 {
 275     struct ConfigWriteData *data = opaque;
 276     const char *id = qemu_opts_id(opts);
 277
 278     if (id) {
 279         fprintf(data->fp, "[%s \"%s\"]\n", data->list->name, id);
 280     } else {
 281         fprintf(data->fp, "[%s]\n", data->list->name);
 282     }
 283     qemu_opt_foreach(opts, config_write_opt, data, 0);
 284     fprintf(data->fp, "\n");
 285     return 0;
 286 }
 287
 288 void qemu_config_write(FILE *fp)
 289 {
 290     struct ConfigWriteData data = { .fp = fp };
 291     int i;
 292
 293     fprintf(fp, "# qemu config file\n\n");
 294     for (i = 0; lists[i] != NULL; i++) {
 295         data.list = lists[i];
 296         qemu_opts_foreach(data.list, config_write_opts, &data, 0);
 297     }
 298 }
 299
 300 int qemu_config_parse(FILE *fp)
 301 {
 302     char line[1024], group[64], id[64], arg[64], value[1024];
 303     QemuOptsList *list = NULL;
 304     QemuOpts *opts = NULL;
 305
 306     while (fgets(line, sizeof(line), fp) != NULL) {
 307         if (line[0] == '\n') {
 308             /* skip empty lines */
 309             continue;
 310         }
 311         if (line[0] == '#') {
 312             /* comment */
 313             continue;
 314         }
 315         if (sscanf(line, "[%63s \"%63[^\"]\"]", group, id) == 2) {
 316             /* group with id */
 317             list = find_list(group);
 318             if (list == NULL)
 319                 return -1;
 320             opts = qemu_opts_create(list, id, 1);
 321             continue;
 322         }
 323         if (sscanf(line, "[%63[^]]]", group) == 1) {
 324             /* group without id */
 325             list = find_list(group);
 326             if (list == NULL)
 327                 return -1;
 328             opts = qemu_opts_create(list, NULL, 0);
 329             continue;
 330         }
 331         if (sscanf(line, " %63s = \"%1023[^\"]\"", arg, value) == 2) {
 332             /* arg = value */
 333             if (opts == NULL) {
 334                 fprintf(stderr, "no group defined\n");
 335                 return -1;
 336             }
 337             if (qemu_opt_set(opts, arg, value) != 0) {
 338                 fprintf(stderr, "failed to set \"%s\" for %s\n",
 339                         arg, group);
 340                 return -1;
 341             }
 342             continue;
 343         }
 344         fprintf(stderr, "parse error: %s\n", line);
 345         return -1;
 346     }
 347     return 0;
 348 }