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drbd: Fix the WO=drain implementation for multiple volumes

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Wait until IO is drained in all volumes.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-11-10 21:19:11 +01:00
parent 1e9dd2912e
commit 77fede5137
1 changed files with 17 additions and 1 deletions
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18
drivers/block/drbd/drbd_receiver.c
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@ -1334,6 +1334,22 @@ static void drbd_remove_epoch_entry_interval(struct drbd_conf *mdev,
wake_up(&mdev->misc_wait);
}
void conn_wait_active_ee_empty(struct drbd_tconn *tconn)
{
struct drbd_conf *mdev;
int vnr;
rcu_read_lock();
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
kref_get(&mdev->kref);
rcu_read_unlock();
drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
kref_put(&mdev->kref, &drbd_minor_destroy);
rcu_read_lock();
}
rcu_read_unlock();
}
static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct drbd_conf *mdev;
@ -1372,7 +1388,7 @@ static int receive_Barrier(struct drbd_tconn *tconn, struct packet_info *pi)
case WO_bdev_flush:
case WO_drain_io:
drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
conn_wait_active_ee_empty(tconn);
drbd_flush(tconn);
if (atomic_read(&tconn->current_epoch->epoch_size)) {