This is a preparation patch for implementing the support for the
write-zeroes operations for null_blk. We introduce a new bool flag
write-zeroes for nullb_device structure so that user can either set
this value through configfs when null_blk is memory backed or use
module parameter. Following two patches are implementing respective
support for REQ_OP_WRITE_ZEROES.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
drivers/block/null_blk.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/block/null_blk.h b/drivers/block/null_blk.h
index 34b22d6523ba..ecd1e45f6eb9 100644
--- a/drivers/block/null_blk.h
+++ b/drivers/block/null_blk.h
@@ -63,6 +63,7 @@ struct nullb_device {
bool power; /* power on/off the device */
bool memory_backed; /* if data is stored in memory */
bool discard; /* if support discard */
+ bool write_zeroes; /* if support write_zeroes */
bool zoned; /* if device is zoned */
};
--
2.17.0
