[Qemu-devel] [PATCHv2 06/20] block: add discard and write_zeroes limits and alignment to BlockDriverState

[Peter Lieven <pl@kamp.de>]

Signed-off-by: Peter Lieven <pl@kamp.de>
---
 include/block/block_int.h |   12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index 85c3474..692b9ed 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -280,6 +280,18 @@ struct BlockDriverState {
     /* the memory alignment required for the buffers handled by this driver */
     int buffer_alignment;
 
+    /* maximum number of sectors that can be discarded at once */
+    int max_discard;
+
+    /* optimal alignment for discard requests in sectors */
+    int64_t discard_alignment;
+
+    /* maximum number of sectors that can zeroized at once */
+    int max_write_zeroes;
+
+    /* optimal alignment for write zeroes requests in sectors */
+    int64_t write_zeroes_alignment;
+
     /* do we need to tell the quest if we have a volatile write cache? */
     int enable_write_cache;
 
-- 
1.7.9.5