static const char *libxl_tapif_script(libxl__gc *gc)
{
#ifdef __linux__
return libxl__strdup(gc, "no");
#else
return libxl__sprintf(gc, "%s/qemu-ifup", libxl__xen_script_dir_path());
#endif
}
int init_subkind_drbd_disk(libxl__remus_devices_state *rds)
{
STATE_AO_GC(rds->ao);
rds->drbd_probe_script = GCSPRINTF("%s/block-drbd-probe",
libxl__xen_script_dir_path());
return 0;
}
int init_subkind_nic(libxl__checkpoint_devices_state *cds)
{
int rc, ret;
libxl__domain_save_state *dss = CONTAINER_OF(cds, *dss, cds);
libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
rs->nlsock = nl_socket_alloc();
if (!rs->nlsock) {
LOGD(ERROR, dss->domid, "cannot allocate nl socket");
rc = ERROR_FAIL;
goto out;
}
ret = nl_connect(rs->nlsock, NETLINK_ROUTE);
if (ret) {
LOGD(ERROR, dss->domid, "failed to open netlink socket: %s",
nl_geterror(ret));
rc = ERROR_FAIL;
goto out;
}
/* get list of all qdiscs installed on network devs. */
ret = rtnl_qdisc_alloc_cache(rs->nlsock, &rs->qdisc_cache);
if (ret) {
LOGD(ERROR, dss->domid, "failed to allocate qdisc cache: %s",
nl_geterror(ret));
rc = ERROR_FAIL;
goto out;
}
if (dss->remus->netbufscript) {
rs->netbufscript = libxl__strdup(gc, dss->remus->netbufscript);
} else {
rs->netbufscript = GCSPRINTF("%s/remus-netbuf-setup",
libxl__xen_script_dir_path());
}
rc = 0;
out:
return rc;
}
void libxl__colo_restore_setup(libxl__egc *egc,
libxl__colo_restore_state *crs)
{
libxl__domain_create_state *dcs = CONTAINER_OF(crs, *dcs, crs);
libxl__colo_restore_checkpoint_state *crcs;
int rc = ERROR_FAIL;
/* Convenience aliases */
libxl__srm_restore_autogen_callbacks *const callbacks =
&dcs->srs.shs.callbacks.restore.a;
const int domid = crs->domid;
STATE_AO_GC(crs->ao);
GCNEW(crcs);
crs->crcs = crcs;
crcs->crs = crs;
crs->qdisk_setuped = false;
crs->qdisk_used = false;
if (dcs->colo_proxy_script)
crs->colo_proxy_script = libxl__strdup(gc, dcs->colo_proxy_script);
else
crs->colo_proxy_script = GCSPRINTF("%s/colo-proxy-setup",
libxl__xen_script_dir_path());
/* setup dsps */
crcs->dsps.ao = ao;
crcs->dsps.domid = domid;
if (init_dsps(&crcs->dsps))
goto out;
callbacks->postcopy = libxl__colo_restore_domain_resume_callback;
callbacks->wait_checkpoint = libxl__colo_restore_domain_wait_checkpoint_callback;
callbacks->suspend = libxl__colo_restore_domain_suspend_callback;
callbacks->checkpoint = libxl__colo_restore_domain_checkpoint_callback;
/*
* Secondary vm is running in colo mode, so we need to call
* libxl__xc_domain_restore_done() to create secondary vm.
* But we will exit in domain_create_cb(). So replace the
* callback here.
*/
crs->saved_cb = dcs->callback;
dcs->callback = libxl__colo_domain_create_cb;
crcs->state_file = GCSPRINTF(LIBXL_DEVICE_MODEL_RESTORE_FILE".%d", domid);
crcs->status = LIBXL_COLO_SETUPED;
libxl__logdirty_init(&crcs->lds);
crcs->lds.ao = ao;
crcs->sws.fd = crs->send_back_fd;
crcs->sws.ao = ao;
crcs->sws.back_channel = true;
dcs->cds.concrete_data = crs;
libxl__stream_write_start(egc, &crcs->sws);
rc = 0;
out:
crs->callback(egc, crs, rc);
return;
}
void libxl__colo_save_setup(libxl__egc *egc, libxl__colo_save_state *css)
{
libxl__domain_save_state *dss = CONTAINER_OF(css, *dss, css);
/* Convenience aliases */
libxl__checkpoint_devices_state *const cds = &dss->cds;
libxl__srm_save_autogen_callbacks *const callbacks =
&dss->sws.shs.callbacks.save.a;
STATE_AO_GC(dss->ao);
if (dss->type != LIBXL_DOMAIN_TYPE_HVM) {
LOGD(ERROR, dss->domid, "COLO only supports hvm now");
goto out;
}
css->send_fd = dss->fd;
css->recv_fd = dss->recv_fd;
css->svm_running = false;
css->paused = true;
css->qdisk_setuped = false;
css->qdisk_used = false;
libxl__ev_child_init(&css->child);
css->cps.is_userspace_proxy =
libxl_defbool_val(dss->remus->userspace_colo_proxy);
if (dss->remus->netbufscript)
css->colo_proxy_script = libxl__strdup(gc, dss->remus->netbufscript);
else
css->colo_proxy_script = GCSPRINTF("%s/colo-proxy-setup",
libxl__xen_script_dir_path());
cds->ops = colo_ops;
cds->callback = colo_save_setup_done;
cds->ao = ao;
cds->domid = dss->domid;
cds->concrete_data = css;
/* If enable userspace proxy mode, we don't need VIF */
if (css->cps.is_userspace_proxy) {
cds->device_kind_flags = (1 << LIBXL__DEVICE_KIND_VBD);
/* Use this args we can connect to qemu colo-compare */
cds->nics = libxl__device_list(gc, &libxl__nic_devtype,
cds->domid, &cds->num_nics);
if (cds->num_nics > 0) {
css->cps.checkpoint_host = cds->nics[0].colo_checkpoint_host;
css->cps.checkpoint_port = cds->nics[0].colo_checkpoint_port;
}
} else {
cds->device_kind_flags = (1 << LIBXL__DEVICE_KIND_VIF) |
(1 << LIBXL__DEVICE_KIND_VBD);
}
css->srs.ao = ao;
css->srs.fd = css->recv_fd;
css->srs.back_channel = true;
libxl__stream_read_start(egc, &css->srs);
css->cps.ao = ao;
if (colo_proxy_setup(&css->cps)) {
LOGD(ERROR, cds->domid, "COLO: failed to setup colo proxy for guest");
goto out;
}
if (init_device_subkind(cds))
goto out;
callbacks->suspend = libxl__colo_save_domain_suspend_callback;
callbacks->checkpoint = libxl__colo_save_domain_checkpoint_callback;
callbacks->postcopy = libxl__colo_save_domain_resume_callback;
callbacks->wait_checkpoint = libxl__colo_save_domain_wait_checkpoint_callback;
libxl__checkpoint_devices_setup(egc, &dss->cds);
return;
out:
dss->callback(egc, dss, ERROR_FAIL);
}
int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic,
uint32_t domid, bool hotplug)
{
int rc;
if (!nic->mtu)
nic->mtu = 1492;
if (!nic->model) {
nic->model = strdup("rtl8139");
if (!nic->model) return ERROR_NOMEM;
}
if (libxl__mac_is_default(&nic->mac)) {
const uint8_t *r;
libxl_uuid uuid;
libxl_uuid_generate(&uuid);
r = libxl_uuid_bytearray(&uuid);
nic->mac[0] = 0x00;
nic->mac[1] = 0x16;
nic->mac[2] = 0x3e;
nic->mac[3] = r[0] & 0x7f;
nic->mac[4] = r[1];
nic->mac[5] = r[2];
}
if (!nic->bridge) {
nic->bridge = strdup("xenbr0");
if (!nic->bridge) return ERROR_NOMEM;
}
if ( !nic->script && asprintf(&nic->script, "%s/vif-bridge",
libxl__xen_script_dir_path()) < 0 )
return ERROR_FAIL;
rc = libxl__resolve_domid(gc, nic->backend_domname, &nic->backend_domid);
if (rc < 0) return rc;
switch (libxl__domain_type(gc, domid)) {
case LIBXL_DOMAIN_TYPE_HVM:
if (!nic->nictype) {
if (hotplug ||
(libxl__device_model_version_running(gc, domid) ==
LIBXL_DEVICE_MODEL_VERSION_NONE))
nic->nictype = LIBXL_NIC_TYPE_VIF;
else
nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
}
break;
case LIBXL_DOMAIN_TYPE_PV:
if (nic->nictype == LIBXL_NIC_TYPE_VIF_IOEMU) {
LOG(ERROR, "trying to create PV guest with an emulated interface");
return ERROR_INVAL;
}
nic->nictype = LIBXL_NIC_TYPE_VIF;
break;
case LIBXL_DOMAIN_TYPE_INVALID:
return ERROR_FAIL;
default:
abort();
}
return rc;
}
static void libxl__device_nic_add(libxl__egc *egc, uint32_t domid,
libxl_device_nic *nic,
libxl__ao_device *aodev)
{
STATE_AO_GC(aodev->ao);
flexarray_t *front;
flexarray_t *back;
libxl__device *device;
int rc;
xs_transaction_t t = XBT_NULL;
libxl_domain_config d_config;
libxl_device_nic nic_saved;
libxl__domain_userdata_lock *lock = NULL;
libxl_domain_config_init(&d_config);
libxl_device_nic_init(&nic_saved);
libxl_device_nic_copy(CTX, &nic_saved, nic);
rc = libxl__device_nic_setdefault(gc, nic, domid, aodev->update_json);
if (rc) goto out;
front = flexarray_make(gc, 16, 1);
back = flexarray_make(gc, 18, 1);
if (nic->devid == -1) {
if ((nic->devid = libxl__device_nextid(gc, domid, "vif")) < 0) {
rc = ERROR_FAIL;
goto out;
}
}
libxl__update_config_nic(gc, &nic_saved, nic);
GCNEW(device);
rc = libxl__device_from_nic(gc, domid, nic, device);
if ( rc != 0 ) goto out;
flexarray_append(back, "frontend-id");
flexarray_append(back, GCSPRINTF("%d", domid));
flexarray_append(back, "online");
flexarray_append(back, "1");
flexarray_append(back, "state");
flexarray_append(back, GCSPRINTF("%d", XenbusStateInitialising));
if (nic->script)
flexarray_append_pair(back, "script",
libxl__abs_path(gc, nic->script,
libxl__xen_script_dir_path()));
if (nic->ifname) {
flexarray_append(back, "vifname");
flexarray_append(back, nic->ifname);
}
if (nic->coloft_forwarddev) {
flexarray_append(back, "forwarddev");
flexarray_append(back, nic->coloft_forwarddev);
}
flexarray_append(back, "mac");
flexarray_append(back,GCSPRINTF(LIBXL_MAC_FMT, LIBXL_MAC_BYTES(nic->mac)));
if (nic->ip) {
flexarray_append(back, "ip");
flexarray_append(back, libxl__strdup(gc, nic->ip));
}
if (nic->gatewaydev) {
flexarray_append(back, "gatewaydev");
flexarray_append(back, libxl__strdup(gc, nic->gatewaydev));
}
if (nic->rate_interval_usecs > 0) {
flexarray_append(back, "rate");
flexarray_append(back, GCSPRINTF("%"PRIu64",%"PRIu32"",
nic->rate_bytes_per_interval,
nic->rate_interval_usecs));
}
flexarray_append(back, "bridge");
flexarray_append(back, libxl__strdup(gc, nic->bridge));
flexarray_append(back, "handle");
flexarray_append(back, GCSPRINTF("%d", nic->devid));
flexarray_append(back, "type");
flexarray_append(back, libxl__strdup(gc,
libxl_nic_type_to_string(nic->nictype)));
flexarray_append(front, "backend-id");
flexarray_append(front, GCSPRINTF("%d", nic->backend_domid));
flexarray_append(front, "state");
flexarray_append(front, GCSPRINTF("%d", XenbusStateInitialising));
flexarray_append(front, "handle");
flexarray_append(front, GCSPRINTF("%d", nic->devid));
flexarray_append(front, "mac");
flexarray_append(front, GCSPRINTF(
LIBXL_MAC_FMT, LIBXL_MAC_BYTES(nic->mac)));
if (aodev->update_json) {
lock = libxl__lock_domain_userdata(gc, domid);
if (!lock) {
rc = ERROR_LOCK_FAIL;
goto out;
}
rc = libxl__get_domain_configuration(gc, domid, &d_config);
if (rc) goto out;
DEVICE_ADD(nic, nics, domid, &nic_saved, COMPARE_DEVID, &d_config);
rc = libxl__dm_check_start(gc, &d_config, domid);
if (rc) goto out;
}
for (;;) {
rc = libxl__xs_transaction_start(gc, &t);
if (rc) goto out;
rc = libxl__device_exists(gc, t, device);
if (rc < 0) goto out;
if (rc == 1) { /* already exists in xenstore */
LOG(ERROR, "device already exists in xenstore");
aodev->action = LIBXL__DEVICE_ACTION_ADD; /* for error message */
rc = ERROR_DEVICE_EXISTS;
goto out;
}
if (aodev->update_json) {
rc = libxl__set_domain_configuration(gc, domid, &d_config);
if (rc) goto out;
}
libxl__device_generic_add(gc, t, device,
libxl__xs_kvs_of_flexarray(gc, back,
back->count),
libxl__xs_kvs_of_flexarray(gc, front,
front->count),
NULL);
rc = libxl__xs_transaction_commit(gc, &t);
if (!rc) break;
if (rc < 0) goto out;
}
aodev->dev = device;
aodev->action = LIBXL__DEVICE_ACTION_ADD;
libxl__wait_device_connection(egc, aodev);
rc = 0;
out:
libxl__xs_transaction_abort(gc, &t);
if (lock) libxl__unlock_domain_userdata(lock);
libxl_device_nic_dispose(&nic_saved);
libxl_domain_config_dispose(&d_config);
aodev->rc = rc;
if (rc) aodev->callback(egc, aodev);
return;
}
