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[Qemu-block] [PATCH v4 3/5] qcow2: Reduce REFT_OFFSET_MASK
From: |
Eric Blake |
Subject: |
[Qemu-block] [PATCH v4 3/5] qcow2: Reduce REFT_OFFSET_MASK |
Date: |
Tue, 27 Feb 2018 10:29:42 -0600 |
Match our code to the spec change in the previous patch - there's
no reason for the refcount table to allow larger offsets than the
L1/L2 tables. In practice, no image has more than 64PB of
allocated clusters anyways, as anything beyond that can't be
expressed via L2 mappings to host offsets.
Suggested-by: Alberto Garcia <address@hidden>
Signed-off-by: Eric Blake <address@hidden>
---
v4: new patch
---
block/qcow2.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/block/qcow2.h b/block/qcow2.h
index 883802241fb..afc524ead54 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -442,7 +442,7 @@ typedef enum QCow2MetadataOverlap {
#define L2E_OFFSET_MASK 0x00fffffffffffe00ULL
#define L2E_COMPRESSED_OFFSET_SIZE_MASK 0x3fffffffffffffffULL
-#define REFT_OFFSET_MASK 0xfffffffffffffe00ULL
+#define REFT_OFFSET_MASK 0x00fffffffffffe00ULL
static inline int64_t start_of_cluster(BDRVQcow2State *s, int64_t offset)
{
--
2.14.3