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migration, vl: start migration via qmp_migrate_incoming 

Make qemu_start_incoming_migration local to migration/migration.c.
By using the runstate instead of a separate flag, vl need not do
anything to setup deferred incoming migration.

qmp_migrate_incoming also does not need the deferred_incoming flag
anymore, because "-incoming PROTOCOL" will clear the "once" flag
before the main loop starts.  Therefore, later invocations of
the migrate-incoming command will fail with the existing
"The incoming migration has already been started" error message.

Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-10-27 04:22:57 -04:00
parent cca686b44a
commit e69d50d621
3 changed files with 15 additions and 30 deletions
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1
include/migration/misc.h
View File

@ -58,7 +58,6 @@ void dump_vmstate_json_to_file(FILE *out_fp);
/* migration/migration.c */
void migration_object_init(void);
void migration_shutdown(void);
void qemu_start_incoming_migration(const char *uri, Error **errp);
bool migration_is_idle(void);
bool migration_is_active(MigrationState *);
void add_migration_state_change_notifier(Notifier *notify);

33
migration/migration.c
View File

@ -118,8 +118,6 @@
static NotifierList migration_state_notifiers =
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
static bool deferred_incoming;
/* Messages sent on the return path from destination to source */
enum mig_rp_message_type {
MIG_RP_MSG_INVALID = 0, /* Must be 0 */
@ -275,19 +273,6 @@ static bool migrate_late_block_activate(void)
MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
}
/*
* Called on -incoming with a defer: uri.
* The migration can be started later after any parameters have been
* changed.
*/
static void deferred_incoming_migration(Error **errp)
{
if (deferred_incoming) {
error_setg(errp, "Incoming migration already deferred");
}
deferred_incoming = true;
}
/*
* Send a message on the return channel back to the source
* of the migration.
@ -429,16 +414,14 @@ void migrate_add_address(SocketAddress *address)
addrs->value = QAPI_CLONE(SocketAddress, address);
}
void qemu_start_incoming_migration(const char *uri, Error **errp)
static void qemu_start_incoming_migration(const char *uri, Error **errp)
{
const char *p = NULL;
qapi_event_send_migration(MIGRATION_STATUS_SETUP);
if (!strcmp(uri, "defer")) {
deferred_incoming_migration(errp);
} else if (strstart(uri, "tcp:", &p) ||
strstart(uri, "unix:", NULL) ||
strstart(uri, "vsock:", NULL)) {
if (strstart(uri, "tcp:", &p) ||
strstart(uri, "unix:", NULL) ||
strstart(uri, "vsock:", NULL)) {
socket_start_incoming_migration(p ? p : uri, errp);
#ifdef CONFIG_RDMA
} else if (strstart(uri, "rdma:", &p)) {
@ -1988,14 +1971,14 @@ void qmp_migrate_incoming(const char *uri, Error **errp)
Error *local_err = NULL;
static bool once = true;
if (!deferred_incoming) {
error_setg(errp, "For use with '-incoming defer'");
return;
}
if (!once) {
error_setg(errp, "The incoming migration has already been started");
return;
}
if (!runstate_check(RUN_STATE_INMIGRATE)) {
error_setg(errp, "'-incoming' was not specified on the command line");
return;
}
qemu_start_incoming_migration(uri, &local_err);

11
softmmu/vl.c
View File

@ -109,6 +109,7 @@
#include "qapi/qapi-visit-block-core.h"
#include "qapi/qapi-visit-ui.h"
#include "qapi/qapi-commands-block-core.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-commands-run-state.h"
#include "qapi/qapi-commands-ui.h"
#include "qapi/qmp/qerror.h"
@ -4556,10 +4557,12 @@ void qemu_init(int argc, char **argv, char **envp)
}
if (incoming) {
Error *local_err = NULL;
qemu_start_incoming_migration(incoming, &local_err);
if (local_err) {
error_reportf_err(local_err, "-incoming %s: ", incoming);
exit(1);
if (strcmp(incoming, "defer") != 0) {
qmp_migrate_incoming(incoming, &local_err);
if (local_err) {
error_reportf_err(local_err, "-incoming %s: ", incoming);
exit(1);
}
}
} else if (autostart) {
vm_start();