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