[Qemu-devel] [RFC V2 4/7] block: Add bdrv_dedup_control to start and stop deduplication.

[Benoît Canet]

---
 block.c               |   16 ++++++++++++++++
 include/block/block.h |    1 +
 2 files changed, 17 insertions(+)

diff --git a/block.c b/block.c
index e9d7764..3f0bccc 100644
--- a/block.c
+++ b/block.c
@@ -4306,6 +4306,22 @@ bool bdrv_has_dedup(BlockDriverState *bs)
     return bdi.has_dedup;
 }
 
+/* Start or stop deduplication given the value of enable */
+int bdrv_dedup_control(BlockDriverState *bs, const bool enable)
+{
+    BlockDriver *drv = bs->drv;
+
+    if (!bdrv_has_dedup(bs)) {
+        return -EINVAL;
+    }
+
+    if (drv && drv->bdrv_dedup_control) {
+        drv->bdrv_dedup_control(bs, enable);
+    }
+
+    return 0;
+}
+
 /* needed for generic scsi interface */
 
 int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf)
diff --git a/include/block/block.h b/include/block/block.h
index 55549ae..e06c571 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -307,6 +307,7 @@ int bdrv_is_inserted(BlockDriverState *bs);
 int bdrv_media_changed(BlockDriverState *bs);
 void bdrv_lock_medium(BlockDriverState *bs, bool locked);
 bool bdrv_has_dedup(BlockDriverState *bs);
+int bdrv_dedup_control(BlockDriverState *bs, const bool enable);
 void bdrv_eject(BlockDriverState *bs, bool eject_flag);
 const char *bdrv_get_format_name(BlockDriverState *bs);
 BlockDriverState *bdrv_find(const char *name);
-- 
1.7.10.4