637c53ffcb
Add a Xenstore directory for each supported pv backend. This will allow Xen tools to decide which backend type to use in case there are multiple possibilities. The information is added under /local/domain/<backend-domid>/device-model/<domid>/backends before the "running" state is written to Xenstore. Using a directory for each backend enables us to add parameters for specific backends in the future. This interface is documented in the Xen source repository in the file docs/misc/qemu-backends.txt In order to reuse the Xenstore directory creation already present in hw/xen/xen_devconfig.c move the related functions to hw/xen/xen_backend.c where they fit better. Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Reviewed-by: Wei Liu <wei.liu2@citrix.com> Message-id: 1463062421-613-3-git-send-email-jgross@suse.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
#include "qemu/osdep.h"
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#include "hw/xen/xen_backend.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/blockdev.h"
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/* ------------------------------------------------------------- */
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static int xen_config_dev_dirs(const char *ftype, const char *btype, int vdev,
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char *fe, char *be, int len)
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{
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char *dom;
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dom = xs_get_domain_path(xenstore, xen_domid);
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snprintf(fe, len, "%s/device/%s/%d", dom, ftype, vdev);
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free(dom);
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dom = xs_get_domain_path(xenstore, 0);
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snprintf(be, len, "%s/backend/%s/%d/%d", dom, btype, xen_domid, vdev);
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free(dom);
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xenstore_mkdir(fe, XS_PERM_READ | XS_PERM_WRITE);
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xenstore_mkdir(be, XS_PERM_READ);
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return 0;
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}
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static int xen_config_dev_all(char *fe, char *be)
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{
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/* frontend */
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if (xen_protocol)
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xenstore_write_str(fe, "protocol", xen_protocol);
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xenstore_write_int(fe, "state", XenbusStateInitialising);
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xenstore_write_int(fe, "backend-id", 0);
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xenstore_write_str(fe, "backend", be);
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/* backend */
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xenstore_write_str(be, "domain", qemu_name ? qemu_name : "no-name");
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xenstore_write_int(be, "online", 1);
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xenstore_write_int(be, "state", XenbusStateInitialising);
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xenstore_write_int(be, "frontend-id", xen_domid);
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xenstore_write_str(be, "frontend", fe);
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return 0;
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}
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/* ------------------------------------------------------------- */
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int xen_config_dev_blk(DriveInfo *disk)
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{
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char fe[256], be[256], device_name[32];
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int vdev = 202 * 256 + 16 * disk->unit;
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int cdrom = disk->media_cd;
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const char *devtype = cdrom ? "cdrom" : "disk";
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const char *mode = cdrom ? "r" : "w";
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const char *filename = qemu_opt_get(disk->opts, "file");
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snprintf(device_name, sizeof(device_name), "xvd%c", 'a' + disk->unit);
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xen_be_printf(NULL, 1, "config disk %d [%s]: %s\n",
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disk->unit, device_name, filename);
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xen_config_dev_dirs("vbd", "qdisk", vdev, fe, be, sizeof(fe));
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/* frontend */
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xenstore_write_int(fe, "virtual-device", vdev);
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xenstore_write_str(fe, "device-type", devtype);
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/* backend */
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xenstore_write_str(be, "dev", device_name);
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xenstore_write_str(be, "type", "file");
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xenstore_write_str(be, "params", filename);
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xenstore_write_str(be, "mode", mode);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_nic(NICInfo *nic)
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{
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char fe[256], be[256];
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char mac[20];
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int vlan_id = -1;
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net_hub_id_for_client(nic->netdev, &vlan_id);
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snprintf(mac, sizeof(mac), "%02x:%02x:%02x:%02x:%02x:%02x",
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nic->macaddr.a[0], nic->macaddr.a[1], nic->macaddr.a[2],
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nic->macaddr.a[3], nic->macaddr.a[4], nic->macaddr.a[5]);
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xen_be_printf(NULL, 1, "config nic %d: mac=\"%s\"\n", vlan_id, mac);
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xen_config_dev_dirs("vif", "qnic", vlan_id, fe, be, sizeof(fe));
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/* frontend */
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xenstore_write_int(fe, "handle", vlan_id);
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xenstore_write_str(fe, "mac", mac);
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/* backend */
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xenstore_write_int(be, "handle", vlan_id);
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xenstore_write_str(be, "mac", mac);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_vfb(int vdev, const char *type)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("vfb", "vfb", vdev, fe, be, sizeof(fe));
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/* backend */
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xenstore_write_str(be, "type", type);
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/* common stuff */
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_vkbd(int vdev)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("vkbd", "vkbd", vdev, fe, be, sizeof(fe));
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return xen_config_dev_all(fe, be);
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}
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int xen_config_dev_console(int vdev)
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{
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char fe[256], be[256];
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xen_config_dev_dirs("console", "console", vdev, fe, be, sizeof(fe));
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return xen_config_dev_all(fe, be);
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}
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