A function to zero out local backing device.
Signed-off-by: Nick Wang <[email protected]>
CC: Philipp Reisner <[email protected]>
CC: Lars Ellenberg <[email protected]>
CC: [email protected]
CC: [email protected]
---
drbd/drbd_int.h | 1 +
drbd/drbd_receiver.c | 21 +++++++++++++++++++++
2 files changed, 22 insertions(+)
diff --git a/drbd/drbd_int.h b/drbd/drbd_int.h
index 08d6648..9cc0ef9 100644
--- a/drbd/drbd_int.h
+++ b/drbd/drbd_int.h
@@ -1662,6 +1662,7 @@ extern void drbd_send_acks_wf(struct work_struct *ws);
extern bool drbd_rs_c_min_rate_throttle(struct drbd_device *device);
extern bool drbd_rs_should_slow_down(struct drbd_device *device, sector_t
sector,
bool throttle_if_app_is_waiting);
+extern int zero_out_local_device(struct drbd_device *device);
extern int drbd_submit_peer_request(struct drbd_device *,
struct drbd_peer_request *, const unsigned,
const int);
diff --git a/drbd/drbd_receiver.c b/drbd/drbd_receiver.c
index 5e6b149..47b8fe5 100644
--- a/drbd/drbd_receiver.c
+++ b/drbd/drbd_receiver.c
@@ -1594,6 +1594,27 @@ void drbd_bump_write_ordering(struct drbd_resource
*resource, struct drbd_backin
void conn_wait_active_ee_empty(struct drbd_connection *connection);
/**
+ * zero_out_local_device()
+ * @device: DRBD device.
+ *
+ * Description:
+ * Zero out drbd backing device when creating new uuid.
+ *
+**/
+int zero_out_local_device(struct drbd_device *device)
+{
+ struct block_device *bdev;
+
+ bdev = device->ldev->backing_bdev;
+ if (device->ldev->known_size != drbd_get_capacity(bdev))
+ device->ldev->known_size = drbd_get_capacity(bdev);
+
+ /* zero out the backing device */
+ return blkdev_issue_zeroout(bdev, 0,
+ device->ldev->known_size , GFP_NOIO, false);
+}
+
+/**
* drbd_submit_peer_request()
* @device: DRBD device.
* @peer_req: peer request
--
1.8.4.5
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