Signed-off-by: Peter Lieven <p...@kamp.de>
---
include/block/block.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/block/block.h b/include/block/block.h
index 599de7d..ee17048 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -18,6 +18,15 @@ typedef struct BlockDriverInfo {
/* offset at which the VM state can be saved (0 if not possible) */
int64_t vm_state_offset;
bool is_dirty;
+ /* do discarded blocks read back as zeroes? */
+ bool discard_zeroes;
+ /* is write zeroes optimized by a discard/unmap operation?
+ * this requires support for the BDRV_REQ_MAY_UNMAP flag. */
+ bool discard_write_zeroes;
+ /* maximum number of sectors that can be discarded at once */
+ int max_discard;
+ /* maximum number of sectors that can zeroized at once */
+ int max_write_zeroes;
} BlockDriverInfo;
typedef struct BlockFragInfo {
--
1.7.9.5
