drbd: transfer log epoch numbers are now per resource

cherry-picked from drbd 9 devel branch.

In preparation of multiple connections, the "barrier number" or
"epoch number" needs to be tracked per-resource, not per connection.
The sequence number space will not be reset anymore.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 5b1789af6cdf..d7ca76ce00cb 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -864,6 +864,7 @@ struct drbd_tconn {			/* is a resource from the config file */
         spinlock_t epoch_lock;
         unsigned int epochs;
         enum write_ordering_e write_ordering;
+        atomic_t current_tle_nr;        /* transfer log epoch number */
 
         unsigned long last_reconnect_jif;
         struct drbd_thread receiver;