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migration: merge enforce_config_section somewhat

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These two parameters:

- MachineState::enforce_config_section
- MigrationState::send_configuration

are playing similar role here. This patch merges the first one into
second, then we'll have a single place to reference whether we need to
send the configuration section.

I didn't remove the MachineState.enforce_config_section field since when
applying that machine property (in machine_set_property()) we haven't
yet initialized global properties and migration object. Then, it's
still not easy to pass that boolean to MigrationState at such an early
time.

A natural benefit for current patch is that now we kept the meaning of
"enforce-config-section" since it'll still have the highest
priority (that's what "enforce" mean I guess).

Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1498536619-14548-10-git-send-email-peterx@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Peter Xu 2017-06-27 12:10:18 +08:00 committed by Juan Quintela
parent 15c3850325
commit 4ffdb337e7
2 changed files with 14 additions and 10 deletions
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12
migration/migration.c
View file

@ -42,6 +42,7 @@
#include "exec/target_page.h"
#include "io/channel-buffer.h"
#include "migration/colo.h"
#include "hw/boards.h"
#define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */
@ -102,9 +103,20 @@ static MigrationState *current_migration;
void migration_object_init(void)
{
MachineState *ms = MACHINE(qdev_get_machine());
/* This can only be called once. */
assert(!current_migration);
current_migration = MIGRATION_OBJ(object_new(TYPE_MIGRATION));
/*
* We cannot really do this in migration_instance_init() since at
* that time global properties are not yet applied, then this
* value will be definitely replaced by something else.
*/
if (ms->enforce_config_section) {
current_migration->send_configuration = true;
}
}
/* For outgoing */

12
migration/savevm.c
View file

@ -943,20 +943,13 @@ bool qemu_savevm_state_blocked(Error **errp)
return false;
}
static bool enforce_config_section(void)
{
MachineState *machine = MACHINE(qdev_get_machine());
return machine->enforce_config_section;
}
void qemu_savevm_state_header(QEMUFile *f)
{
trace_savevm_state_header();
qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
qemu_put_be32(f, QEMU_VM_FILE_VERSION);
if (migrate_get_current()->send_configuration ||
enforce_config_section()) {
if (migrate_get_current()->send_configuration) {
qemu_put_byte(f, QEMU_VM_CONFIGURATION);
vmstate_save_state(f, &vmstate_configuration, &savevm_state, 0);
}
@ -1980,8 +1973,7 @@ int qemu_loadvm_state(QEMUFile *f)
return -ENOTSUP;
}
if (migrate_get_current()->send_configuration ||
enforce_config_section()) {
if (migrate_get_current()->send_configuration) {
if (qemu_get_byte(f) != QEMU_VM_CONFIGURATION) {
error_report("Configuration section missing");
return -EINVAL;