LXR qemu/hw/xen/xen

   1#include "qemu/osdep.h"
   2#include "hw/xen/xen_backend.h"
   3#include "qemu/option.h"
   4#include "sysemu/block-backend.h"
   5#include "sysemu/blockdev.h"
   6
   7/* ------------------------------------------------------------- */
   8
   9static 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
  27static 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
  49int 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
  77int 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
 102int 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
 115int 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
 123int 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}
 130