qemu-config.c

   1 #include "qemu-common.h"
   2 #include "qemu-option.h"
   3 #include "qemu-config.h"
   4
   5 QemuOptsList qemu_drive_opts = {
   6     .name = "drive",
   7     .head = TAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
   8     .desc = {
   9         {
  10             .name = "bus",
  11             .type = QEMU_OPT_NUMBER,
  12             .help = "bus number",
  13         },{
  14             .name = "unit",
  15             .type = QEMU_OPT_NUMBER,
  16             .help = "unit number (i.e. lun for scsi)",
  17         },{
  18             .name = "if",
  19             .type = QEMU_OPT_STRING,
  20             .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
  21         },{
  22             .name = "index",
  23             .type = QEMU_OPT_NUMBER,
  24         },{
  25             .name = "cyls",
  26             .type = QEMU_OPT_NUMBER,
  27             .help = "number of cylinders (ide disk geometry)",
  28         },{
  29             .name = "heads",
  30             .type = QEMU_OPT_NUMBER,
  31             .help = "number of heads (ide disk geometry)",
  32         },{
  33             .name = "secs",
  34             .type = QEMU_OPT_NUMBER,
  35             .help = "number of sectors (ide disk geometry)",
  36         },{
  37             .name = "trans",
  38             .type = QEMU_OPT_STRING,
  39             .help = "chs translation (auto, lba. none)",
  40         },{
  41             .name = "media",
  42             .type = QEMU_OPT_STRING,
  43             .help = "media type (disk, cdrom)",
  44         },{
  45             .name = "snapshot",
  46             .type = QEMU_OPT_BOOL,
  47         },{
  48             .name = "file",
  49             .type = QEMU_OPT_STRING,
  50             .help = "disk image",
  51         },{
  52             .name = "cache",
  53             .type = QEMU_OPT_STRING,
  54             .help = "host cache usage (none, writeback, writethrough)",
  55         },{
  56             .name = "aio",
  57             .type = QEMU_OPT_STRING,
  58             .help = "host AIO implementation (threads, native)",
  59         },{
  60             .name = "format",
  61             .type = QEMU_OPT_STRING,
  62             .help = "disk format (raw, qcow2, ...)",
  63         },{
  64             .name = "serial",
  65             .type = QEMU_OPT_STRING,
  66         },{
  67             .name = "werror",
  68             .type = QEMU_OPT_STRING,
  69         },{
  70             .name = "addr",
  71             .type = QEMU_OPT_STRING,
  72             .help = "pci address (virtio only)",
  73         },
  74         { /* end if list */ }
  75     },
  76 };
  77
  78 QemuOptsList qemu_chardev_opts = {
  79     .name = "chardev",
  80     .head = TAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
  81     .desc = {
  82         {
  83             .name = "backend",
  84             .type = QEMU_OPT_STRING,
  85         },{
  86             .name = "path",
  87             .type = QEMU_OPT_STRING,
  88         },
  89         { /* end if list */ }
  90     },
  91 };
  92
  93 QemuOptsList qemu_device_opts = {
  94     .name = "device",
  95     .head = TAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
  96     .desc = {
  97         /*
  98          * no elements => accept any
  99          * sanity checking will happen later
 100          * when setting device properties
 101          */
 102         { /* end if list */ }
 103     },
 104 };
 105
 106 static QemuOptsList *lists[] = {
 107     &qemu_drive_opts,
 108     &qemu_chardev_opts,
 109     &qemu_device_opts,
 110     NULL,
 111 };
 112
 113 int qemu_set_option(const char *str)
 114 {
 115     char group[64], id[64], arg[64];
 116     QemuOpts *opts;
 117     int i, rc, offset;
 118
 119     rc = sscanf(str, "%63[^.].%63[^.].%63[^=]%n", group, id, arg, &offset);
 120     if (rc < 3 || str[offset] != '=') {
 121         fprintf(stderr, "can't parse: \"%s\"\n", str);
 122         return -1;
 123     }
 124
 125     for (i = 0; lists[i] != NULL; i++) {
 126         if (strcmp(lists[i]->name, group) == 0)
 127             break;
 128     }
 129     if (lists[i] == NULL) {
 130         fprintf(stderr, "there is no option group \"%s\"\n", group);
 131         return -1;
 132     }
 133
 134     opts = qemu_opts_find(lists[i], id);
 135     if (!opts) {
 136         fprintf(stderr, "there is no %s \"%s\" defined\n",
 137                 lists[i]->name, id);
 138         return -1;
 139     }
 140
 141     if (-1 == qemu_opt_set(opts, arg, str+offset+1)) {
 142         fprintf(stderr, "failed to set \"%s\" for %s \"%s\"\n",
 143                 arg, lists[i]->name, id);
 144         return -1;
 145     }
 146     return 0;
 147 }
 148