From: Lars Ellenberg Date: Tue, 24 Jul 2012 07:31:18 +0000 (+0200) Subject: drbd: __req_mod: make DISCARD_WRITE and independend case X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=934722a2dbf87b43d39c787441e511157d5add94;p=deliverable%2Flinux.git drbd: __req_mod: make DISCARD_WRITE and independend case cherry-picked and adapted from drbd 9 devel branch This looks cleaner to me, and also gets rid of the other ugly if-inside-case-fall-through. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg --- diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index 329528d9dec7..f2ba43e78377 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -609,13 +609,19 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what, case DISCARD_WRITE: /* for discarded conflicting writes of multiple primaries, * there is no need to keep anything in the tl, potential - * node crashes are covered by the activity log. */ - mod_rq_state(req, NULL, 0, RQ_NET_DONE); - /* fall through */ + * node crashes are covered by the activity log. + * + * If this request had been marked as RQ_POSTPONED before, + * it will actually not be discarded, but "restarted", + * resubmitted from the retry worker context. */ + D_ASSERT(req->rq_state & RQ_NET_PENDING); + D_ASSERT(req->rq_state & RQ_EXP_WRITE_ACK); + mod_rq_state(req, m, RQ_NET_PENDING, RQ_NET_DONE|RQ_NET_OK); + break; + case WRITE_ACKED_BY_PEER_AND_SIS: + req->rq_state |= RQ_NET_SIS; case WRITE_ACKED_BY_PEER: - if (what == WRITE_ACKED_BY_PEER_AND_SIS) - req->rq_state |= RQ_NET_SIS; D_ASSERT(req->rq_state & RQ_EXP_WRITE_ACK); /* protocol C; successfully written on peer. * Nothing more to do here.