Re: [Qemu-block] [PATCH v3 14/39] qcow2: Add offset_to_l2_slice_index()

[Max Reitz]

On 2018-01-26 15:59, Alberto Garcia wrote:
> Similar to offset_to_l2_index(), this function takes a guest offset
> and returns the index in the L2 slice that contains its L2 entry.
> 
> An L2 slice has currently the same size as an L2 table (one cluster),
> so both functions return the same value for now.
> 
> Signed-off-by: Alberto Garcia 
> Reviewed-by: Eric Blake 
> ---
>  block/qcow2.h | 5 +
>  1 file changed, 5 insertions(+)

Reviewed-by: Max Reitz 



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[Qemu-block] [PATCH v3 14/39] qcow2: Add offset_to_l2_slice_index()

[Alberto Garcia]

Similar to offset_to_l2_index(), this function takes a guest offset
and returns the index in the L2 slice that contains its L2 entry.

An L2 slice has currently the same size as an L2 table (one cluster),
so both functions return the same value for now.

Signed-off-by: Alberto Garcia 
Reviewed-by: Eric Blake 
---
 block/qcow2.h | 5 +
 1 file changed, 5 insertions(+)

diff --git a/block/qcow2.h b/block/qcow2.h
index e0aee88811..87b5c4063e 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -474,6 +474,11 @@ static inline int offset_to_l2_index(BDRVQcow2State *s, 
int64_t offset)
 return (offset >> s->cluster_bits) & (s->l2_size - 1);
 }
 
+static inline int offset_to_l2_slice_index(BDRVQcow2State *s, int64_t offset)
+{
+return (offset >> s->cluster_bits) & (s->l2_slice_size - 1);
+}
+
 static inline int64_t align_offset(int64_t offset, int n)
 {
 offset = (offset + n - 1) & ~(n - 1);
-- 
2.11.0