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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2010-05-27 09:45:45 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-06-01 11:12:27 +0200 |
| commit | d255e5ff5fc6cc6c60dd014d1261448a7bbc8134 (patch) | |
| tree | af933be5ddb81b1e47be2f91ff558c5c792f2f0f /drivers/block/drbd/drbd_req.c | |
| parent | 32fa7e91f923d8b2578c42016ff3a94efc9968a2 (diff) | |
| download | linux-d255e5ff5fc6cc6c60dd014d1261448a7bbc8134.tar.gz linux-d255e5ff5fc6cc6c60dd014d1261448a7bbc8134.tar.bz2 linux-d255e5ff5fc6cc6c60dd014d1261448a7bbc8134.zip | |
drbd: fix hang on local read errors while disconnected
"canceled" w_read_retry_remote never completed, if they have been
canceled after drbd_disconnect connection teardown cleanup has already
run (or we are currently not connected anyways).
Fixed by not queueing a remote retry if we already know it won't work
(pdsk not uptodate), and cleanup ourselves on "cancel", in case we hit a
race with drbd_disconnect.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/block/drbd/drbd_req.c')
| -rw-r--r-- | drivers/block/drbd/drbd_req.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index e6c4d579eaba..8915644af722 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -452,20 +452,21 @@ void __req_mod(struct drbd_request *req, enum drbd_req_event what, dev_alert(DEV, "Local READ failed sec=%llus size=%u\n", (unsigned long long)req->sector, req->size); - /* _req_mod(req,to_be_send); oops, recursion... */ D_ASSERT(!(req->rq_state & RQ_NET_MASK)); - req->rq_state |= RQ_NET_PENDING; - inc_ap_pending(mdev); __drbd_chk_io_error(mdev, FALSE); put_ldev(mdev); - /* NOTE: if we have no connection, - * or know the peer has no good data either, - * then we don't actually need to "queue_for_net_read", - * but we do so anyways, since the drbd_io_error() - * and the potential state change to "Diskless" - * needs to be done from process context */ + /* no point in retrying if there is no good remote data, + * or we have no connection. */ + if (mdev->state.pdsk != D_UP_TO_DATE) { + _req_may_be_done(req, m); + break; + } + + /* _req_mod(req,to_be_send); oops, recursion... */ + req->rq_state |= RQ_NET_PENDING; + inc_ap_pending(mdev); /* fall through: _req_mod(req,queue_for_net_read); */ case queue_for_net_read: @@ -575,6 +576,9 @@ void __req_mod(struct drbd_request *req, enum drbd_req_event what, _req_may_be_done(req, m); break; + case read_retry_remote_canceled: + req->rq_state &= ~RQ_NET_QUEUED; + /* fall through, in case we raced with drbd_disconnect */ case connection_lost_while_pending: /* transfer log cleanup after connection loss */ /* assert something? */ |