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drbd: application writes may set-in-sync in protocol != C

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If "dirty" blocks are written to during resync,
that brings them in-sync.

By explicitly requesting write-acks during resync even in protocol != C,
we now can actually respect this.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg
2014-03-20 11:19:22 +01:00
committed by Philipp Reisner
parent 5d0b17f1a2
commit 08d0dabf48
4 changed files with 49 additions and 31 deletions
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5
drivers/block/drbd/drbd_main.c
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@@ -1639,7 +1639,10 @@ int drbd_send_dblock(struct drbd_peer_device *peer_device, struct drbd_request *
if (peer_device->connection->agreed_pro_version >= 100) {
if (req->rq_state & RQ_EXP_RECEIVE_ACK)
dp_flags |= DP_SEND_RECEIVE_ACK;
if (req->rq_state & RQ_EXP_WRITE_ACK)
/* During resync, request an explicit write ack,
* even in protocol != C */
if (req->rq_state & RQ_EXP_WRITE_ACK
|| (dp_flags & DP_MAY_SET_IN_SYNC))
dp_flags |= DP_SEND_WRITE_ACK;
}
p->dp_flags = cpu_to_be32(dp_flags);