Add qemu 2.4.0

[kvmfornfv.git] / qemu / hw / xen / xen_devconfig.c

diff --git a/qemu/hw/xen/xen_devconfig.c b/qemu/hw/xen/xen_devconfig.c
new file mode 100644 (file)
index 0000000..e138dbb
--- /dev/null
+++ b/qemu/hw/xen/xen_devconfig.c
@@ -0,0 +1,175 @@
+#include "hw/xen/xen_backend.h"
+#include "sysemu/block-backend.h"
+#include "sysemu/blockdev.h"
+
+/* ------------------------------------------------------------- */
+
+struct xs_dirs {
+    char *xs_dir;
+    QTAILQ_ENTRY(xs_dirs) list;
+};
+static QTAILQ_HEAD(xs_dirs_head, xs_dirs) xs_cleanup = QTAILQ_HEAD_INITIALIZER(xs_cleanup);
+
+static void xen_config_cleanup_dir(char *dir)
+{
+    struct xs_dirs *d;
+
+    d = g_malloc(sizeof(*d));
+    d->xs_dir = dir;
+    QTAILQ_INSERT_TAIL(&xs_cleanup, d, list);
+}
+
+void xen_config_cleanup(void)
+{
+    struct xs_dirs *d;
+
+    QTAILQ_FOREACH(d, &xs_cleanup, list) {
+       xs_rm(xenstore, 0, d->xs_dir);
+    }
+}
+
+/* ------------------------------------------------------------- */
+
+static int xen_config_dev_mkdir(char *dev, int p)
+{
+    struct xs_permissions perms[2] = {{
+            .id    = 0, /* set owner: dom0 */
+        },{
+            .id    = xen_domid,
+            .perms = p,
+        }};
+
+    if (!xs_mkdir(xenstore, 0, dev)) {
+       xen_be_printf(NULL, 0, "xs_mkdir %s: failed\n", dev);
+       return -1;
+    }
+    xen_config_cleanup_dir(g_strdup(dev));
+
+    if (!xs_set_permissions(xenstore, 0, dev, perms, 2)) {
+       xen_be_printf(NULL, 0, "xs_set_permissions %s: failed\n", dev);
+       return -1;
+    }
+    return 0;
+}
+
+static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
+                              char *fe, char *be, int len)
+{
+    char *dom;
+
+    dom = xs_get_domain_path(xenstore, xen_domid);
+    snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
+    free(dom);
+
+    dom = xs_get_domain_path(xenstore, 0);
+    snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
+    free(dom);
+
+    xen_config_dev_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
+    xen_config_dev_mkdir(be, XS_PERM_READ);
+    return 0;
+}
+
+static int xen_config_dev_all(char *fe, char *be)
+{
+    /* frontend */
+    if (xen_protocol)
+        xenstore_write_str(fe, "protocol", xen_protocol);
+
+    xenstore_write_int(fe, "state",           XenbusStateInitialising);
+    xenstore_write_int(fe, "backend-id",      0);
+    xenstore_write_str(fe, "backend",         be);
+
+    /* backend */
+    xenstore_write_str(be, "domain",          qemu_name ? qemu_name : "no-name");
+    xenstore_write_int(be, "online",          1);
+    xenstore_write_int(be, "state",           XenbusStateInitialising);
+    xenstore_write_int(be, "frontend-id",     xen_domid);
+    xenstore_write_str(be, "frontend",        fe);
+
+    return 0;
+}
+
+/* ------------------------------------------------------------- */
+
+int xen_config_dev_blk(DriveInfo *disk)
+{
+    char fe[256], be[256], device_name[32];
+    int vdev = 202 * 256 + 16 * disk->unit;
+    int cdrom = disk->media_cd;
+    const char *devtype = cdrom ? "cdrom" : "disk";
+    const char *mode    = cdrom ? "r"     : "w";
+    const char *filename = qemu_opt_get(disk->opts, "file");
+
+    snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit);
+    xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n",
+                  disk->unit, device_name, filename);
+    xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
+
+    /* frontend */
+    xenstore_write_int(fe, "virtual-device",  vdev);
+    xenstore_write_str(fe, "device-type",     devtype);
+
+    /* backend */
+    xenstore_write_str(be, "dev",             device_name);
+    xenstore_write_str(be, "type",            "file");
+    xenstore_write_str(be, "params",          filename);
+    xenstore_write_str(be, "mode",            mode);
+
+    /* common stuff */
+    return xen_config_dev_all(fe, be);
+}
+
+int xen_config_dev_nic(NICInfo *nic)
+{
+    char fe[256], be[256];
+    char mac[20];
+    int vlan_id = -1;
+
+    net_hub_id_for_client(nic->netdev, &vlan_id);
+    snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
+             nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
+             nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
+    xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
+    xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
+
+    /* frontend */
+    xenstore_write_int(fe, "handle",     vlan_id);
+    xenstore_write_str(fe, "mac",        mac);
+
+    /* backend */
+    xenstore_write_int(be, "handle",     vlan_id);
+    xenstore_write_str(be, "mac",        mac);
+
+    /* common stuff */
+    return xen_config_dev_all(fe, be);
+}
+
+int xen_config_dev_vfb(int vdev, const char *type)
+{
+    char fe[256], be[256];
+
+    xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
+
+    /* backend */
+    xenstore_write_str(be, "type",  type);
+
+    /* common stuff */
+    return xen_config_dev_all(fe, be);
+}
+
+int xen_config_dev_vkbd(int vdev)
+{
+    char fe[256], be[256];
+
+    xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
+    return xen_config_dev_all(fe, be);
+}
+
+int xen_config_dev_console(int vdev)
+{
+    char fe[256], be[256];
+
+    xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
+    return xen_config_dev_all(fe, be);
+}