[PATCH 08/11] drbd: Implemented conn_lowest_disk()

[Philipp Reisner]

Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
Signed-off-by: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
---
 drivers/block/drbd/drbd_state.c |   12 ++++++++++++
 drivers/block/drbd/drbd_state.h |    1 +
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index e441d1f..5db514e 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -103,6 +103,18 @@ enum drbd_disk_state conn_highest_disk(struct drbd_tconn *tconn)
 	return ds;
 }
 
+enum drbd_disk_state conn_lowest_disk(struct drbd_tconn *tconn)
+{
+	enum drbd_disk_state ds = D_MASK;
+	struct drbd_conf *mdev;
+	int vnr;
+
+	idr_for_each_entry(&tconn->volumes, mdev, vnr)
+		ds = min_t(enum drbd_disk_state, ds, mdev->state.disk);
+
+	return ds;
+}
+
 enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn)
 {
 	enum drbd_disk_state ds = D_DISKLESS;
diff --git a/drivers/block/drbd/drbd_state.h b/drivers/block/drbd/drbd_state.h
index e554537..72e2053 100644
--- a/drivers/block/drbd/drbd_state.h
+++ b/drivers/block/drbd/drbd_state.h
@@ -153,6 +153,7 @@ static inline int drbd_request_state(struct drbd_conf *mdev,
 enum drbd_role conn_highest_role(struct drbd_tconn *tconn);
 enum drbd_role conn_highest_peer(struct drbd_tconn *tconn);
 enum drbd_disk_state conn_highest_disk(struct drbd_tconn *tconn);
+enum drbd_disk_state conn_lowest_disk(struct drbd_tconn *tconn);
 enum drbd_disk_state conn_highest_pdsk(struct drbd_tconn *tconn);
 enum drbd_disk_state conn_lowest_conn(struct drbd_tconn *tconn);
 
-- 
1.7.4.1

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