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authorzhanghailiang <zhang.zhanghailiang@huawei.com>2016-10-27 14:42:56 +0800
committerAmit Shah <amit@amitshah.net>2016-10-30 15:17:39 +0530
commit56ba83d2a871a28ec18b8bb0fcec74ed02bbe06c (patch)
tree00c2152467827c5d03c6ff62aa3635ac75c34782
parent25d0c16f625feb3b6b9bf8079388cdd314e63916 (diff)
downloadqemu-arm-56ba83d2a871a28ec18b8bb0fcec74ed02bbe06c.tar.gz
COLO: Establish a new communicating path for COLO
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>
-rw-r--r--migration/colo.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/migration/colo.c b/migration/colo.c
index 550cc5f122..3a0d8043e6 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -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;