diff options
| author | Philipp Reisner <philipp.reisner@linbit.com> | 2012-08-07 15:28:00 +0400 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-09 17:05:47 +0400 |
| commit | 8a0bab2a6dd05ee35777370be892daba01750712 (patch) | |
| tree | b3111de93bd73df69ee330551c5f55636ae0c0e9 | |
| parent | e959d08d3ef6e48bc3b726bcc07a4ebb9989be94 (diff) | |
| download | linux-8a0bab2a6dd05ee35777370be892daba01750712.tar.xz | |
drbd: Finish requests that completed while IO was frozen
Requests of an acked epoch are stored on the barrier_acked_requests list. In
case the private bio of such a request completes while IO on the drbd device
is suspended [req_mod(completed_ok)] then the request stays there.
When thawing IO because the fence_peer handler returned, then we use
tl_clear() to apply the connection_lost_while_pending event to all requests
on the transfer-log and the barrier_acked_requests list.
Up to now the connection_lost_while_pending event was not applied
on requests on the barrier_acked_requests list. Fixed that.
I.e. now the connection_lost_while_pending and resend events are
applied to requests on the barrier_acked_requests list. For that
it is necessary that the resend event finishes (local only)
READS correctly.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
| -rw-r--r-- | drivers/block/drbd/drbd_req.c | 6 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_state.c | 12 |
2 files changed, 13 insertions, 5 deletions
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c index a9111b68fe2d..6e8d09763510 100644 --- a/drivers/block/drbd/drbd_req.c +++ b/drivers/block/drbd/drbd_req.c @@ -683,6 +683,12 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what, break; case RESEND: + /* Simply complete (local only) READs. */ + if (!(req->rq_state & RQ_WRITE) && !req->w.cb) { + mod_rq_state(req, m, RQ_COMPLETION_SUSP, 0); + break; + } + /* If RQ_NET_OK is already set, we got a P_WRITE_ACK or P_RECV_ACK before the connection loss (B&C only); only P_BARRIER_ACK (or the local completion?) was missing when we suspended. diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index 12f2b4fbe559..c16349aec23c 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -1503,7 +1503,6 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused) if (ns_max.susp_fen) { /* case1: The outdate peer handler is successful: */ if (ns_max.pdsk <= D_OUTDATED) { - tl_clear(tconn); rcu_read_lock(); idr_for_each_entry(&tconn->volumes, mdev, vnr) { if (test_bit(NEW_CUR_UUID, &mdev->flags)) { @@ -1512,10 +1511,13 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused) } } rcu_read_unlock(); - conn_request_state(tconn, - (union drbd_state) { { .susp_fen = 1 } }, - (union drbd_state) { { .susp_fen = 0 } }, - CS_VERBOSE); + spin_lock_irq(&tconn->req_lock); + _tl_restart(tconn, CONNECTION_LOST_WHILE_PENDING); + _conn_request_state(tconn, + (union drbd_state) { { .susp_fen = 1 } }, + (union drbd_state) { { .susp_fen = 0 } }, + CS_VERBOSE); + spin_unlock_irq(&tconn->req_lock); } /* case2: The connection was established again: */ if (ns_min.conn >= C_CONNECTED) { |