hw/xen/xen_devconfig.c

   1 #include "qemu/osdep.h"
   2 #include "hw/xen/xen-legacy-backend.h"
   3 #include "qemu/option.h"
   4 #include "sysemu/blockdev.h"
   5 #include "sysemu/sysemu.h"
   6
   7 /* ------------------------------------------------------------- */
   8
   9 static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
  10                                char *fe, char *be, int len)
  11 {
  12     char *dom;
  13
  14     dom = xs_get_domain_path(xenstore, xen_domid);
  15     snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
  16     free(dom);
  17
  18     dom = xs_get_domain_path(xenstore, 0);
  19     snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
  20     free(dom);
  21
  22     xenstore_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
  23     xenstore_mkdir(be, XS_PERM_READ);
  24     return 0;
  25 }
  26
  27 static int xen_config_dev_all(char *fe, char *be)
  28 {
  29     /* frontend */
  30     if (xen_protocol)
  31         xenstore_write_str(fe, "protocol", xen_protocol);
  32
  33     xenstore_write_int(fe, "state",           XenbusStateInitialising);
  34     xenstore_write_int(fe, "backend-id",      0);
  35     xenstore_write_str(fe, "backend",         be);
  36
  37     /* backend */
  38     xenstore_write_str(be, "domain",          qemu_name ? qemu_name : "no-name");
  39     xenstore_write_int(be, "online",          1);
  40     xenstore_write_int(be, "state",           XenbusStateInitialising);
  41     xenstore_write_int(be, "frontend-id",     xen_domid);
  42     xenstore_write_str(be, "frontend",        fe);
  43
  44     return 0;
  45 }
  46
  47 /* ------------------------------------------------------------- */
  48
  49 int xen_config_dev_blk(DriveInfo *disk)
  50 {
  51     char fe[256], be[256], device_name[32];
  52     int vdev = 202 * 256 + 16 * disk->unit;
  53     int cdrom = disk->media_cd;
  54     const char *devtype = cdrom ? "cdrom" : "disk";
  55     const char *mode    = cdrom ? "r"     : "w";
  56     const char *filename = qemu_opt_get(disk->opts, "file");
  57
  58     snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit);
  59     xen_pv_printf(NULL, 1, "config disk %d [%s]: %s\n",
  60                   disk->unit, device_name, filename);
  61     xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
  62
  63     /* frontend */
  64     xenstore_write_int(fe, "virtual-device",  vdev);
  65     xenstore_write_str(fe, "device-type",     devtype);
  66
  67     /* backend */
  68     xenstore_write_str(be, "dev",             device_name);
  69     xenstore_write_str(be, "type",            "file");
  70     xenstore_write_str(be, "params",          filename);
  71     xenstore_write_str(be, "mode",            mode);
  72
  73     /* common stuff */
  74     return xen_config_dev_all(fe, be);
  75 }
  76
  77 int xen_config_dev_nic(NICInfo *nic)
  78 {
  79     char fe[256], be[256];
  80     char mac[20];
  81     int vlan_id = -1;
  82
  83     net_hub_id_for_client(nic->netdev, &vlan_id);
  84     snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
  85              nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
  86              nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
  87     xen_pv_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
  88     xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
  89
  90     /* frontend */
  91     xenstore_write_int(fe, "handle",     vlan_id);
  92     xenstore_write_str(fe, "mac",        mac);
  93
  94     /* backend */
  95     xenstore_write_int(be, "handle",     vlan_id);
  96     xenstore_write_str(be, "mac",        mac);
  97
  98     /* common stuff */
  99     return xen_config_dev_all(fe, be);
 100 }
 101
 102 int xen_config_dev_vfb(int vdev, const char *type)
 103 {
 104     char fe[256], be[256];
 105
 106     xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
 107
 108     /* backend */
 109     xenstore_write_str(be, "type",  type);
 110
 111     /* common stuff */
 112     return xen_config_dev_all(fe, be);
 113 }
 114
 115 int xen_config_dev_vkbd(int vdev)
 116 {
 117     char fe[256], be[256];
 118
 119     xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
 120     return xen_config_dev_all(fe, be);
 121 }
 122
 123 int xen_config_dev_console(int vdev)
 124 {
 125     char fe[256], be[256];
 126
 127     xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
 128     return xen_config_dev_all(fe, be);
 129 }