From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Tue, 29 Mar 2011 16:15:49 +0000 (+0200)
Subject: drbd: Implemented conn_lowest_disk()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=4669265a7bb146ae072951e26c8527fdc733eff6;p=deliverable%2Flinux.git

drbd: Implemented conn_lowest_disk()

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_state.c b/drivers/block/drbd/drbd_state.c
index 36703fee3b0c..896d5dc833cb 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -121,6 +121,18 @@ 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 286af0612dc4..757f9d93643f 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_conns conn_lowest_conn(struct drbd_tconn *tconn);