qcow caches L2 tables. For migration to work, they would have to be
invalidated. Block migration for now.
Signed-off-by: Kevin Wolf <kw...@redhat.com>
---
block/qcow.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/block/qcow.c b/block/qcow.c
index adecee0..4814ed0 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -26,6 +26,7 @@
#include "module.h"
#include <zlib.h>
#include "aes.h"
+#include "migration.h"
/**************************************************************/
/* QEMU COW block driver with compression and encryption support */
@@ -74,6 +75,7 @@ typedef struct BDRVQcowState {
AES_KEY aes_encrypt_key;
AES_KEY aes_decrypt_key;
CoMutex lock;
+ Error *migration_blocker;
} BDRVQcowState;
static int decompress_cluster(BlockDriverState *bs, uint64_t cluster_offset);
@@ -160,6 +162,12 @@ static int qcow_open(BlockDriverState *bs, int flags)
bs->backing_file[len] = '\0';
}
+ /* Disable migration when qcow images are used */
+ error_set(&s->migration_blocker,
+ QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
+ "qcow", bs->device_name, "live migration");
+ migrate_add_blocker(s->migration_blocker);
+
qemu_co_mutex_init(&s->lock);
return 0;
@@ -604,10 +612,14 @@ static int qcow_co_writev(BlockDriverState *bs, int64_t
sector_num,
static void qcow_close(BlockDriverState *bs)
{
BDRVQcowState *s = bs->opaque;
+
g_free(s->l1_table);
g_free(s->l2_cache);
g_free(s->cluster_cache);
g_free(s->cluster_data);
+
+ migrate_del_blocker(s->migration_blocker);
+ error_free(s->migration_blocker);
}
static int qcow_create(const char *filename, QEMUOptionParameter *options)
--
1.7.6.4
