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authorLars Ellenberg <lars.ellenberg@linbit.com>2012-06-08 14:09:54 +0200
committerPhilipp Reisner <philipp.reisner@linbit.com>2012-06-12 14:34:51 +0200
commit1ed25b269e3dd5ecc64f17beef9ea21745c39ca6 (patch)
treea311e656c28d4946ddb0849f1a4e42839706e990 /drivers/block/drbd/drbd_req.c
parent4eccc579795290a58e2262fa4e9d083d7672e699 (diff)
downloadvexpress-lsk-1ed25b269e3dd5ecc64f17beef9ea21745c39ca6.tar.gz
drbd: fix list corruption by failing but already aborted reads
If a read is aborted due to force-detach of a supposedly unresponsive local backing device, and retried on the peer, it can happen that the local request later still completes (hopefully with an error). As it may already have been completed to upper layers meanwhile, it must not be retried again now. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block/drbd/drbd_req.c')
-rw-r--r--drivers/block/drbd/drbd_req.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 9c5c84946b0..773f4e2d3c1 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -472,12 +472,17 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
req->rq_state |= RQ_LOCAL_COMPLETED;
req->rq_state &= ~RQ_LOCAL_PENDING;
- D_ASSERT(!(req->rq_state & RQ_NET_MASK));
+ if (req->rq_state & RQ_LOCAL_ABORTED) {
+ _req_may_be_done(req, m);
+ break;
+ }
__drbd_chk_io_error(mdev, false);
goto_queue_for_net_read:
+ D_ASSERT(!(req->rq_state & RQ_NET_MASK));
+
/* no point in retrying if there is no good remote data,
* or we have no connection. */
if (mdev->state.pdsk != D_UP_TO_DATE) {