drbd: Use and idr data structure to map volume numbers to mdev pointers
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index ddd2ed7..8d32f9d 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -40,6 +40,7 @@
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/genhd.h>
+#include <linux/idr.h>
#include <net/tcp.h>
#include <linux/lru_cache.h>
#include <linux/prefetch.h>
@@ -916,8 +917,9 @@
char *name; /* Resource name */
struct list_head all_tconn; /* List of all drbd_tconn, prot by global_state_lock */
struct drbd_conf *volume0; /* TODO: Remove me again */
- unsigned long flags;
+ struct idr volumes; /* <tconn, vnr> to mdev mapping */
+ unsigned long flags;
struct net_conf *net_conf; /* protected by get_net_conf() and put_net_conf() */
atomic_t net_cnt; /* Users of net_conf */
wait_queue_head_t net_cnt_wait;