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COLO: Establish a new communicating path for COLO

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This new communication path will be used for returning messages
from Secondary side to Primary side.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit@amitshah.net>
This commit is contained in:
zhanghailiang
2016-10-27 14:42:56 +08:00
committed by Amit Shah
parent 25d0c16f62
commit 56ba83d2a8
1 changed files with 28 additions and 0 deletions
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28
migration/colo.c
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@@ -14,6 +14,7 @@
#include "sysemu/sysemu.h"
#include "migration/colo.h"
#include "trace.h"
#include "qemu/error-report.h"
bool colo_supported(void)
{
@@ -36,6 +37,12 @@ bool migration_incoming_in_colo_state(void)
static void colo_process_checkpoint(MigrationState *s)
{
s->rp_state.from_dst_file = qemu_file_get_return_path(s->to_dst_file);
if (!s->rp_state.from_dst_file) {
error_report("Open QEMUFile from_dst_file failed");
goto out;
}
qemu_mutex_lock_iothread();
vm_start();
qemu_mutex_unlock_iothread();
@@ -43,6 +50,10 @@ static void colo_process_checkpoint(MigrationState *s)
/* TODO: COLO checkpoint savevm loop */
out:
if (s->rp_state.from_dst_file) {
qemu_fclose(s->rp_state.from_dst_file);
}
}
void migrate_start_colo_process(MigrationState *s)
@@ -61,8 +72,25 @@ void *colo_process_incoming_thread(void *opaque)
migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_COLO);
mis->to_src_file = qemu_file_get_return_path(mis->from_src_file);
if (!mis->to_src_file) {
error_report("COLO incoming thread: Open QEMUFile to_src_file failed");
goto out;
}
/*
* Note: the communication between Primary side and Secondary side
* should be sequential, we set the fd to unblocked in migration incoming
* coroutine, and here we are in the COLO incoming thread, so it is ok to
* set the fd back to blocked.
*/
qemu_file_set_blocking(mis->from_src_file, true);
/* TODO: COLO checkpoint restore loop */
out:
if (mis->to_src_file) {
qemu_fclose(mis->to_src_file);
}
migration_incoming_exit_colo();
return NULL;