dm thin metadata: delete btrees when releasing metadata snapshot

[deliverable/linux.git] / drivers / md / md-cluster.c

diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index fcfc4b9b26728029e59023ae3762d271b8f7a676..0072190515e0f6edca1e09718dae5102b3e7d274 100644 (file)
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -44,6 +44,7 @@ struct resync_info {
 
 /* md_cluster_info flags */
 #define                MD_CLUSTER_WAITING_FOR_NEWDISK          1
+#define                MD_CLUSTER_SUSPEND_READ_BALANCING       2
 
 
 struct md_cluster_info {
@@ -275,6 +276,9 @@ clear_bit:
 
 static void recover_prep(void *arg)
 {
+       struct mddev *mddev = arg;
+       struct md_cluster_info *cinfo = mddev->cluster_info;
+       set_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state);
 }
 
 static void recover_slot(void *arg, struct dlm_slot *slot)
@@ -307,6 +311,7 @@ static void recover_done(void *arg, struct dlm_slot *slots,
 
        cinfo->slot_number = our_slot;
        complete(&cinfo->completion);
+       clear_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state);
 }
 
 static const struct dlm_lockspace_ops md_ls_ops = {
@@ -816,12 +821,17 @@ static void resync_finish(struct mddev *mddev)
        resync_send(mddev, RESYNCING, 0, 0);
 }
 
-static int area_resyncing(struct mddev *mddev, sector_t lo, sector_t hi)
+static int area_resyncing(struct mddev *mddev, int direction,
+               sector_t lo, sector_t hi)
 {
        struct md_cluster_info *cinfo = mddev->cluster_info;
        int ret = 0;
        struct suspend_info *s;
 
+       if ((direction == READ) &&
+               test_bit(MD_CLUSTER_SUSPEND_READ_BALANCING, &cinfo->state))
+               return 1;
+
        spin_lock_irq(&cinfo->suspend_lock);
        if (list_empty(&cinfo->suspend_list))
                goto out;