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[PATCH 24/29] migration, vl: start migration via qmp_migrate_incoming
From: |
Paolo Bonzini |
Subject: |
[PATCH 24/29] migration, vl: start migration via qmp_migrate_incoming |
Date: |
Tue, 27 Oct 2020 14:21:39 -0400 |
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.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
include/migration/misc.h | 1 -
migration/migration.c | 33 ++++++++-------------------------
softmmu/vl.c | 11 +++++++----
3 files changed, 15 insertions(+), 30 deletions(-)
diff --git a/include/migration/misc.h b/include/migration/misc.h
index 34e7d75713..bccc1b6b44 100644
--- a/include/migration/misc.h
+++ b/include/migration/misc.h
@@ -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);
diff --git a/migration/migration.c b/migration/migration.c
index f48b03cac2..d078094c56 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -114,8 +114,6 @@
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 */
@@ -257,19 +255,6 @@ 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.
@@ -380,16 +365,14 @@ 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)) {
@@ -1926,14 +1909,14 @@ 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);
diff --git a/softmmu/vl.c b/softmmu/vl.c
index ae2854d8af..583366510b 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -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"
@@ -4557,10 +4558,12 @@ 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();
--
2.26.2
- [PATCH 11/29] vl: extract various command line desugaring snippets to a new function, (continued)
- [PATCH 11/29] vl: extract various command line desugaring snippets to a new function, Paolo Bonzini, 2020/10/27
- [PATCH 01/29] trace: remove argument from trace_init_file, Paolo Bonzini, 2020/10/27
- [PATCH 08/29] vl: move prelaunch part of qemu_init to new functions, Paolo Bonzini, 2020/10/27
- [PATCH 15/29] vl: extract default devices to separate functions, Paolo Bonzini, 2020/10/27
- [PATCH 23/29] vl: move -global check earlier, Paolo Bonzini, 2020/10/27
- [PATCH 16/29] vl: move CHECKPOINT_INIT after preconfig, Paolo Bonzini, 2020/10/27
- [PATCH 20/29] vl: separate qemu_apply_machine_options, Paolo Bonzini, 2020/10/27
- [PATCH 22/29] vl: initialize displays before preconfig loop, Paolo Bonzini, 2020/10/27
- [PATCH 12/29] vl: create "-net nic -net user" default earlier, Paolo Bonzini, 2020/10/27
- [PATCH 21/29] vl: separate qemu_resolve_machine_memdev, Paolo Bonzini, 2020/10/27
- [PATCH 24/29] migration, vl: start migration via qmp_migrate_incoming,
Paolo Bonzini <=
- [PATCH 14/29] vl: move semihosting command line fallback to qemu_finish_machine_init, Paolo Bonzini, 2020/10/27
- [PATCH 29/29] vl: allow -incoming defer with -preconfig, Paolo Bonzini, 2020/10/27
- [PATCH 28/29] vl: remove separate preconfig main_loop, Paolo Bonzini, 2020/10/27
- [PATCH 18/29] vl: separate qemu_create_late_backends, Paolo Bonzini, 2020/10/27
- [PATCH 26/29] hmp: introduce cmd_available, Paolo Bonzini, 2020/10/27
- [PATCH 25/29] vl: start VM via qmp_cont, Paolo Bonzini, 2020/10/27
- [PATCH 17/29] vl: separate qemu_create_early_backends, Paolo Bonzini, 2020/10/27
- [PATCH 19/29] vl: separate qemu_create_machine, Paolo Bonzini, 2020/10/27
- [PATCH 27/29] remove preconfig state, Paolo Bonzini, 2020/10/27