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authorLars Ellenberg <lars.ellenberg@linbit.com>2012-03-26 20:55:17 +0200
committerPhilipp Reisner <philipp.reisner@linbit.com>2012-11-08 16:58:25 +0100
commit9ed57dcbda37a1a1fb25ccda4206cc417e54e813 (patch)
tree90ba7da0f3a11df687b6e53b95460f77b4d58df9
parent648e46b531006b069c66f171151819d10b423c26 (diff)
downloadvexpress-lsk-9ed57dcbda37a1a1fb25ccda4206cc417e54e813.tar.gz
drbd: ignore volume number for drbd barrier packet exchange
Transfer log epochs, and therefore P_BARRIER packets, are per resource, not per volume. We must not associate them with "some random volume". 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_int.h4
-rw-r--r--drivers/block/drbd/drbd_main.c10
-rw-r--r--drivers/block/drbd/drbd_receiver.c53
3 files changed, 31 insertions, 36 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index ab9926e915c..85769085485 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -584,7 +584,7 @@ struct drbd_tl_epoch {
};
struct drbd_epoch {
- struct drbd_conf *mdev;
+ struct drbd_tconn *tconn;
struct list_head list;
unsigned int barrier_nr;
atomic_t epoch_size; /* increased on every request added. */
@@ -1060,7 +1060,7 @@ extern int drbd_send_sizes(struct drbd_conf *mdev, int trigger_reply, enum dds_f
extern int drbd_send_state(struct drbd_conf *mdev, union drbd_state s);
extern int drbd_send_current_state(struct drbd_conf *mdev);
extern int drbd_send_sync_param(struct drbd_conf *mdev);
-extern void drbd_send_b_ack(struct drbd_conf *mdev, u32 barrier_nr,
+extern void drbd_send_b_ack(struct drbd_tconn *tconn, u32 barrier_nr,
u32 set_size);
extern int drbd_send_ack(struct drbd_conf *, enum drbd_packet,
struct drbd_peer_request *);
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 5529d392e5d..f8438d426d0 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1463,21 +1463,21 @@ int drbd_send_bitmap(struct drbd_conf *mdev)
return err;
}
-void drbd_send_b_ack(struct drbd_conf *mdev, u32 barrier_nr, u32 set_size)
+void drbd_send_b_ack(struct drbd_tconn *tconn, u32 barrier_nr, u32 set_size)
{
struct drbd_socket *sock;
struct p_barrier_ack *p;
- if (mdev->state.conn < C_CONNECTED)
+ if (tconn->cstate < C_WF_REPORT_PARAMS)
return;
- sock = &mdev->tconn->meta;
- p = drbd_prepare_command(mdev, sock);
+ sock = &tconn->meta;
+ p = conn_prepare_command(tconn, sock);
if (!p)
return;
p->barrier = barrier_nr;
p->set_size = cpu_to_be32(set_size);
- drbd_send_command(mdev, sock, P_BARRIER_ACK, sizeof(*p), NULL, 0);
+ conn_send_command(tconn, sock, P_BARRIER_ACK, sizeof(*p), NULL, 0);
}
/**
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index b159ad15abe..786a7551079 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1169,11 +1169,15 @@ static enum finish_epoch drbd_may_finish_epoch(struct drbd_tconn *tconn,
(test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags) || ev & EV_CLEANUP)) {
if (!(ev & EV_CLEANUP)) {
spin_unlock(&tconn->epoch_lock);
- drbd_send_b_ack(epoch->mdev, epoch->barrier_nr, epoch_size);
+ drbd_send_b_ack(epoch->tconn, epoch->barrier_nr, epoch_size);
spin_lock(&tconn->epoch_lock);
}
+#if 0
+ /* FIXME: dec unacked on connection, once we have
+ * something to count pending connection packets in. */
if (test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags))
- dec_unacked(epoch->mdev);
+ dec_unacked(epoch->tconn);
+#endif
if (tconn->current_epoch != epoch) {
next_epoch = list_entry(epoch->list.next, struct drbd_epoch, list);
@@ -1369,19 +1373,15 @@ void conn_wait_active_ee_empty(struct drbd_tconn *tconn)
static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct drbd_conf *mdev;
int rv;
struct p_barrier *p = pi->data;
struct drbd_epoch *epoch;
- mdev = vnr_to_mdev(tconn, pi->vnr);
- if (!mdev)
- return -EIO;
-
- inc_unacked(mdev);
-
+ /* FIXME these are unacked on connection,
+ * not a specific (peer)device.
+ */
tconn->current_epoch->barrier_nr = p->barrier;
- tconn->current_epoch->mdev = mdev;
+ tconn->current_epoch->tconn = tconn;
rv = drbd_may_finish_epoch(tconn, tconn->current_epoch, EV_GOT_BARRIER_NR);
/* P_BARRIER_ACK may imply that the corresponding extent is dropped from
@@ -1400,7 +1400,7 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
if (epoch)
break;
else
- dev_warn(DEV, "Allocation of an epoch failed, slowing down\n");
+ conn_warn(tconn, "Allocation of an epoch failed, slowing down\n");
/* Fall through */
case WO_bdev_flush:
@@ -1414,15 +1414,9 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
break;
}
- epoch = tconn->current_epoch;
- wait_event(mdev->ee_wait, atomic_read(&epoch->epoch_size) == 0);
-
- D_ASSERT(atomic_read(&epoch->active) == 0);
- D_ASSERT(epoch->flags == 0);
-
return 0;
default:
- dev_err(DEV, "Strangeness in tconn->write_ordering %d\n", tconn->write_ordering);
+ conn_err(tconn, "Strangeness in tconn->write_ordering %d\n", tconn->write_ordering);
return -EIO;
}
@@ -5049,21 +5043,22 @@ static int got_NegRSDReply(struct drbd_tconn *tconn, struct packet_info *pi)
static int got_BarrierAck(struct drbd_tconn *tconn, struct packet_info *pi)
{
- struct drbd_conf *mdev;
struct p_barrier_ack *p = pi->data;
+ struct drbd_conf *mdev;
+ int vnr;
- mdev = vnr_to_mdev(tconn, pi->vnr);
- if (!mdev)
- return -EIO;
-
- tl_release(mdev->tconn, p->barrier, be32_to_cpu(p->set_size));
+ tl_release(tconn, p->barrier, be32_to_cpu(p->set_size));
- if (mdev->state.conn == C_AHEAD &&
- atomic_read(&mdev->ap_in_flight) == 0 &&
- !test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->flags)) {
- mdev->start_resync_timer.expires = jiffies + HZ;
- add_timer(&mdev->start_resync_timer);
+ rcu_read_lock();
+ idr_for_each_entry(&tconn->volumes, mdev, vnr) {
+ if (mdev->state.conn == C_AHEAD &&
+ atomic_read(&mdev->ap_in_flight) == 0 &&
+ !test_and_set_bit(AHEAD_TO_SYNC_SOURCE, &mdev->flags)) {
+ mdev->start_resync_timer.expires = jiffies + HZ;
+ add_timer(&mdev->start_resync_timer);
+ }
}
+ rcu_read_unlock();
return 0;
}