[Qemu-devel] [PATCH 4/7] qed: add migration blocker

[Anthony Liguori]

Now when you try to migrate with qed, you get:

(qemu) migrate tcp:localhost:1025
Block format 'qed' used by device 'ide0-hd0' does not support feature 'live 
migration'
(qemu)

Signed-off-by: Anthony Liguori <address@hidden>
---
 block/qed.c |   10 ++++++++++
 block/qed.h |    2 ++
 2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/block/qed.c b/block/qed.c
index d032a45..7e22e77 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -16,6 +16,7 @@
 #include "trace.h"
 #include "qed.h"
 #include "qerror.h"
+#include "migration.h"
 
 static void qed_aio_cancel(BlockDriverAIOCB *blockacb)
 {
@@ -504,6 +505,12 @@ static int bdrv_qed_open(BlockDriverState *bs, int flags)
     s->need_check_timer = qemu_new_timer_ns(vm_clock,
                                             qed_need_check_timer_cb, s);
 
+    error_set(&s->migration_blocker,
+              QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
+              "qed", bs->device_name, "live migration");
+    migrate_add_blocker(s->migration_blocker);
+
+
 out:
     if (ret) {
         qed_free_l2_cache(&s->l2_cache);
@@ -516,6 +523,9 @@ static void bdrv_qed_close(BlockDriverState *bs)
 {
     BDRVQEDState *s = bs->opaque;
 
+    migrate_del_blocker(s->migration_blocker);
+    error_free(s->migration_blocker);
+
     qed_cancel_need_check_timer(s);
     qemu_free_timer(s->need_check_timer);
 
diff --git a/block/qed.h b/block/qed.h
index 388fdb3..62cbd3b 100644
--- a/block/qed.h
+++ b/block/qed.h
@@ -164,6 +164,8 @@ typedef struct {
 
     /* Periodic flush and clear need check flag */
     QEMUTimer *need_check_timer;
+
+    Error *migration_blocker;
 } BDRVQEDState;
 
 enum {
-- 
1.7.4.1