static void domcreate_bootloader_done(libxl__egc *egc,
libxl__bootloader_state *bl,
int rc)
{
libxl__domain_create_state *dcs = CONTAINER_OF(bl, *dcs, bl);
STATE_AO_GC(bl->ao);
/* convenience aliases */
const uint32_t domid = dcs->guest_domid;
libxl_domain_config *const d_config = dcs->guest_config;
libxl_domain_build_info *const info = &d_config->b_info;
const int restore_fd = dcs->restore_fd;
libxl__domain_build_state *const state = &dcs->build_state;
libxl__srm_restore_autogen_callbacks *const callbacks =
&dcs->shs.callbacks.restore.a;
if (rc) {
domcreate_rebuild_done(egc, dcs, rc);
return;
}
/* consume bootloader outputs. state->pv_{kernel,ramdisk} have
* been initialised by the bootloader already.
*/
state->pv_cmdline = bl->cmdline;
/* We might be going to call libxl__spawn_local_dm, or _spawn_stub_dm.
* Fill in any field required by either, including both relevant
* callbacks (_spawn_stub_dm will overwrite our trespass if needed). */
dcs->dmss.dm.spawn.ao = ao;
dcs->dmss.dm.guest_config = dcs->guest_config;
dcs->dmss.dm.build_state = &dcs->build_state;
dcs->dmss.dm.callback = domcreate_devmodel_started;
dcs->dmss.callback = domcreate_devmodel_started;
if ( restore_fd < 0 ) {
rc = libxl__domain_build(gc, &d_config->b_info, domid, state);
domcreate_rebuild_done(egc, dcs, rc);
return;
}
/* Restore */
rc = libxl__build_pre(gc, domid, info, state);
if (rc)
goto out;
/* read signature */
int hvm, pae, superpages;
switch (info->type) {
case LIBXL_DOMAIN_TYPE_HVM:
hvm = 1;
superpages = 1;
pae = libxl_defbool_val(info->u.hvm.pae);
callbacks->toolstack_restore = libxl__toolstack_restore;
break;
case LIBXL_DOMAIN_TYPE_PV:
hvm = 0;
superpages = 0;
pae = 1;
break;
default:
rc = ERROR_INVAL;
goto out;
}
libxl__xc_domain_restore(egc, dcs,
hvm, pae, superpages, 1);
return;
out:
libxl__xc_domain_restore_done(egc, dcs, rc, 0, 0);
}
/*
* Returns a boolean indicating whether a further action should be set
* up by the caller. This is needed to prevent mutual recursion with
* stream_continue().
*
* It is a bug for this function to ever call stream_continue() or
* setup_read_record().
*/
static bool process_record(libxl__egc *egc,
libxl__stream_read_state *stream)
{
STATE_AO_GC(stream->ao);
libxl__domain_create_state *dcs = stream->dcs;
libxl__sr_record_buf *rec;
bool further_action_needed = false;
int rc = 0;
/* Pop a record from the head of the queue. */
assert(!LIBXL_STAILQ_EMPTY(&stream->record_queue));
rec = LIBXL_STAILQ_FIRST(&stream->record_queue);
LIBXL_STAILQ_REMOVE_HEAD(&stream->record_queue, entry);
LOG(DEBUG, "Record: %u, length %u", rec->hdr.type, rec->hdr.length);
switch (rec->hdr.type) {
case REC_TYPE_END:
stream_complete(egc, stream, 0);
break;
case REC_TYPE_LIBXC_CONTEXT:
libxl__xc_domain_restore(egc, dcs, &stream->shs, 0, 0, 0);
break;
case REC_TYPE_EMULATOR_XENSTORE_DATA:
if (dcs->guest_config->b_info.device_model_version ==
LIBXL_DEVICE_MODEL_VERSION_NONE) {
rc = ERROR_FAIL;
LOG(ERROR,
"Received a xenstore emulator record when none was expected");
goto err;
}
if (rec->hdr.length < sizeof(libxl__sr_emulator_hdr)) {
rc = ERROR_FAIL;
LOG(ERROR,
"Emulator xenstore data record too short to contain header");
goto err;
}
rc = libxl__restore_emulator_xenstore_data(dcs,
rec->body + sizeof(libxl__sr_emulator_hdr),
rec->hdr.length - sizeof(libxl__sr_emulator_hdr));
if (rc)
goto err;
/*
* libxl__restore_emulator_xenstore_data() is a synchronous function.
* Request that our caller queues another action for us.
*/
further_action_needed = true;
break;
case REC_TYPE_EMULATOR_CONTEXT:
if (dcs->guest_config->b_info.device_model_version ==
LIBXL_DEVICE_MODEL_VERSION_NONE) {
rc = ERROR_FAIL;
LOG(ERROR,
"Received an emulator context record when none was expected");
goto err;
}
write_emulator_blob(egc, stream, rec);
break;
case REC_TYPE_CHECKPOINT_END:
if (!stream->in_checkpoint) {
LOG(ERROR, "Unexpected CHECKPOINT_END record in stream");
rc = ERROR_FAIL;
goto err;
}
checkpoint_done(egc, stream, 0);
break;
default:
LOG(ERROR, "Unrecognised record 0x%08x", rec->hdr.type);
rc = ERROR_FAIL;
goto err;
}
assert(!rc);
free_record(rec);
return further_action_needed;
err:
assert(rc);
free_record(rec);
stream_complete(egc, stream, rc);
return false;
}
