From patchwork Wed Jan 16 16:25:09 2013
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Subject: [RFC,V1,03/12] block: Add bdrv_has_dedup.
Date: Wed, 16 Jan 2013 06:25:09 -0000
From: =?utf-8?q?Beno=C3=AEt_Canet_=3Cbenoit=40irqsave=2Enet=3E?=
X-Patchwork-Id: 212973
Message-Id: <1358353518-5421-4-git-send-email-benoit@irqsave.net>
To: qemu-devel@nongnu.org
Cc: kwolf@redhat.com, pbonzini@redhat.com,
 =?UTF-8?q?Beno=C3=AEt=20Canet?= <benoit@irqsave.net>, stefanha@redhat.com

---
 block.c               |   15 +++++++++++++++
 include/block/block.h |    1 +
 2 files changed, 16 insertions(+)


diff --git a/block.c b/block.c
index a245653..aee33e0 100644
--- a/block.c
+++ b/block.c
@@ -4327,6 +4327,21 @@ void bdrv_lock_medium(BlockDriverState *bs, bool locked)
     }
 }
 
+/* Return true if the device has deduplication */
+bool bdrv_has_dedup(BlockDriverState *bs)
+{
+    BlockDriverInfo bdi;
+    int ret = 0;
+
+    ret = bdrv_get_info((BlockDriverState *) bs, &bdi);
+
+    if (ret < 0) {
+        return false;
+    }
+
+    return bdi.has_dedup;
+}
+
 /* 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 2043560..e6f86ac 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -306,6 +306,7 @@ void bdrv_set_enable_write_cache(BlockDriverState *bs, bool wce);
 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);
 void bdrv_eject(BlockDriverState *bs, bool eject_flag);
 const char *bdrv_get_format_name(BlockDriverState *bs);
 BlockDriverState *bdrv_find(const char *name);