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Subject[Patch v2 05/10] drbd: Functions to notify peer node to zero out
Date
Notify peer node to start zeroing out device.
Update state of peer node when both nodes are
finished zeroing.

Signed-off-by: Nick Wang <nwang@suse.com>
CC: Philipp Reisner <philipp.reisner@linbit.com>
CC: Lars Ellenberg <lars.ellenberg@linbit.com>
CC: drbd-dev@lists.linbit.com
CC: linux-kernel@vger.kernel.org
---
drbd/drbd_int.h | 2 ++
drbd/drbd_main.c | 19 +++++++++++++++++++
2 files changed, 21 insertions(+)

diff --git a/drbd/drbd_int.h b/drbd/drbd_int.h
index 014b65e..f43f957 100644
--- a/drbd/drbd_int.h
+++ b/drbd/drbd_int.h
@@ -1208,6 +1208,8 @@ extern int __drbd_send_protocol(struct drbd_connection *connection, enum drbd_pa
extern int drbd_send_protocol(struct drbd_connection *connection);
extern int drbd_send_uuids(struct drbd_peer_device *);
extern int drbd_send_uuids_skip_initial_sync(struct drbd_peer_device *);
+extern int drbd_send_zero_out_start(struct drbd_peer_device *);
+extern int drbd_send_zero_out_finish(struct drbd_peer_device *);
extern int drbd_send_zero_out_ok(struct drbd_peer_device *);
extern int drbd_send_zero_out_fail(struct drbd_peer_device *);
extern void drbd_gen_and_send_sync_uuid(struct drbd_peer_device *);
diff --git a/drbd/drbd_main.c b/drbd/drbd_main.c
index 740015e..2b821cd 100644
--- a/drbd/drbd_main.c
+++ b/drbd/drbd_main.c
@@ -908,6 +908,25 @@ int drbd_send_uuids_skip_initial_sync(struct drbd_peer_device *peer_device)
return _drbd_send_uuids(peer_device, 8);
}

+
+/**
+ * drbd_send_zero_out_start() - Notify peer node to start zero out
+ * @peer_device: DRBD peer device.
+ */
+int drbd_send_zero_out_start(struct drbd_peer_device *peer_device)
+{
+ return _drbd_send_uuids(peer_device, 16);
+}
+
+/**
+ * drbd_send_zero_out_finish() - Notify both node finished zeroing out
+ * @peer_device: DRBD peer device.
+ */
+int drbd_send_zero_out_finish(struct drbd_peer_device *peer_device)
+{
+ return _drbd_send_uuids(peer_device, 32);
+}
+
/**
* _drbd_send_zero_out_state() - Sends the drbd state to the peer
* @peer_device: DRBD peer device.
--
1.8.4.5


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